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Case Quarries, Portland, Middlesex Co., Connecticut, USA

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Latitude & Longitude (WGS84): 41° 37' 31'' North , 72° 34' 47'' West
Latitude & Longitude (decimal): 41.62528,-72.57972
GeoHash:G#: drkku3thc
Locality type:Group of Quarries
Köppen climate type:Dfa : Hot-summer humid continental climate


The basic history and details are provided by Cameron et al (1954):

The Case prospects lie in the town of Portland, 4.5 miles N. 39° E. of the center of Portland village...

The property is owned by Myron N. Case, Rose Hill, Portland. The Worth Spar Co., Inc., of Cobalt quarried three pegmatites on the property for feldspar from 1933 to 1935. In the summer of 1939 Frank Bajorek of Portland mined the westernmost pegmatite (no. 1 quarry, pl. 43) for feldspar. The Worth Spar Co. prospected the no. 2 pegmatite for sheet mica in August and October 1942. The workings are opencuts that range from 60 to 110 feet in length, 7 to 45 feet in width and 10 to 25 feet in maximum depth. All are flooded.

The pegmatites were mapped by E. N. Cameron and V. E. Shainin in March 1943 and were studied period­ically until December 1943 (fig. 130 and pl. 43). The U. S. Bureau of Mines and Geological Survey cooperated in surface and subsurface exploration of the pegmatites from May to November 1943. E. E. Maillot was in charge of the project for the Bureau of Mines and V. E. Shainin studied the subsurface geology for the Geological Survey. The no. 2 and 3 quarries were pumped, and 14 holes totaling 1,673.5 feet were made by diamond-drill.

The three pegmatites on the Case property lie within 500 feet of one another. They strike north to northeast and differ in direction and magnitude of dip. The pegmatites cut granite-gneiss (Monson gneiss), the foliation of which strikes generally northward and dips 20°-30° W.

The no. 1 pegmatite, westernmost of the group, is 5 to 7.5 feet thick, strikes N. 70 E. and dips 35°-45° SE. It has been quarried for about 100 feet along strike and to a maximum depth of 17 feet. It may have terminated upward a short distance above the rim of the workings. The pegmatite has a border zone 1/2 to 1 inch thick consisting of fine-grained granular quartz, plagioclase, [microcline] perthite, and beryl. The rest of the pegmatite (designated [microcline] perthite-quartz zone on pl. 43) consists of medium- to extremely coarse-grained [microcline] perthite and quartz, with subordinate plagioclase and muscovite, and accessory beryl, garnet, and columbite-tantalite. Muscovite forms small, colorless to gray-green, heavily stained books, irregularly distributed. In general, the texture of this material is progressively coarser toward the center of the pegmatite. There is no clearly defined quartz core exposed, but in places in the central part of the pegmatite there are irregular bodies of quartz, against which the [microcline] perthite crystals are euhedral. Offshoots of the quartz bodies extend outward across the surrounding pegmatite along fractures. In addition, veins of quartz occur along the contacts with wall rock. Debris left in the north end of the opencut suggests the presence of a small quartz core flanked by a perthite-quartz zone similar to that of the no. 2 pegmatite described below.

High-grade [microcline] perthite constitutes at least 50 percent of the [microcline] perthite-quartz zone visible. Beryl occurs chiefly in the border zone and the outermost 12 to 18 inches of the perthite-quartz zone, and is most abundant in the footwall part of the perthite-quartz zone. The crystals range from 1/8 inch to 4 inches in length and from 1/16 inch to 3 inches in diameter. Measurements of all crystals in the cross-section of the pegmatite in the northern face of the quarry indicate a beryl content of 0.15 per­cent. However, the exposures available for measurement are few, and the accuracy of the figure obtained for grade is doubtful. Waste rock on the dump seemed to show considerably more beryl in material derived from the [microcline] perthite-quartz zone than is indicated by the crystal measurements. Measurements of beryl crystals in the footwall part of the border zone indicated 0.41 percent beryl.

The no. 2 pegmatite (mined in the no. 2 quarry) is a tabular lens that strikes N. 17° E. and dips 15° NW. At the surface, it has a strike length of 60 feet. It probably terminates beneath overburden less than 40 feet northward from the quarry. The south edge of the lens plunges southward from the open cut at a moderate angle. One hundred and eighty feet down dip from its surface outcrop, the inferred strike length of the pegmatite is 155 feet. The thickness of the body ranges from 10 feet at the surface to about 16 feet at a point 180 feet down dip.

The pegmatite is distinctly zoned. The border zone, 2 to 4 inches thick, is composed of fine-grained quartz, [microcline] perthite, and plagioclase, with accessory muscovite, garnet, beryl, and tourmaline. The wall zone, 2 to 6 inches thick, consists of medium-grained [microcline] perthite, plagioclase, and quartz, with accessory muscovite, beryl, and garnet. The intermediate zone, 1 to 4 feet thick, is similar to the wall zone but is composed chiefly of quartz and extremely coarse [microcline] perthite. The core averages 5 feet in thickness and is composed of coarsely crystalline milky quartz, accessory [microcline] perthite in scattered large, euhedral crystals, and rare beryl. [Microcline] Perthite crystals in the [microcline] perthite-quartz intermediate zone are euhedral against quartz of the core. The zonal structure was clearly recognizable in 3 of the 4 drill holes that intersected the pegmatite 1, 2, and 5. Cores from holes 5 and 7 were inadequate for the construction of logs.

Beryl occurs in the border and wall zones in scattered crystals ¼ to ¾ inches in diameter and as much as 3 inches long. Some crystals in the [microcline] perthite-quartz zone are 9 inches in diameter and 10 inches long. Measurements on exposures in the quarry (230 square feet) suggest that the average beryl content of the pegmatite is 0.34 percent. On the basis of this figure, and diamond drilling, 53 tons of beryl are indicated and 27 tons are inferred to lie beneath the surface to a depth of 180 feet clown the dip.

The percentage of high-grade feldspar in the no. 2 pegmatite is less than that in the no. 1 pegmatite but [microcline] perthite in the [microcline] perthite-quartz zone is mostly pure and separable by hand sorting.

The no. 3 pegmatite, northernmost of the group, is a tabular lens that strikes N. 25° to 48° E. and dips 63° to 71° NW. The crest of the lens plunges gently northward and southward from the quarry. The strike length of the pegmatite ranges from 70 feet at the surface to at least 350 feet at a level 120 feet down dip from the workings. Along strike the dike is thickest in the center (7 feet) and thins to less than 2 feet both north and south of the workings. The pegmatite was probably not intersected by drill hole 14. It is believed to terminate above the hole but below elevation 240 feet (pl. 43, sec. A-A’).

The dike exhibits a fairly distinct zonal structure in the no. 3 quarry. The border zone, ½ to 1 inch thick, is composed of quartz, [microcline] perthite, and plagioclase, with accessory black tourmaline, muscovite, beryl, and garnet. The wall zone, 1 to 2 feet thick, is irregular and in places absent. It is composed of quartz and plagioclase with various amounts of coarse-grained [microcline] perthite, subordinate muscovite, accessory beryl, tourmaline, and columbite-tantalite. The pegmatite inside the wall zone consists of coarse-grained [microcline] perthite and quartz with accessory beryl and plagioclase. There is no true quartz core, but irregular bodies of quartz are present in the quartz-[microcline] perthite zone. Neighboring [microcline] perthite crystals are euhedral against the quartz bodies. The zonal structure of the pegmatite was recognized in the diamond-drill hole cores, although it was less clearly defined than at the surface.

Beryl occurs in the border zone in crystals less than ¼ inch in diameter and 1 inch long, and in the wall zone crystals as much as 2 inches in diameter and 5 inches long. The footwall part of the wall zone appears to contain more beryl than the hanging-wall part, and the beryl crystals are larger. Counts made on the northern and southern faces of the quarry (250 square feet of pegmatite), before and after exploratory blasting, indicate an average beryl content of 0.22 percent. From this figure and data of the Bureau of Mines, 25 tons of beryl is indicated and 6 tons inferred to lie beneath the surface to a depth of 120 feet down the dip.

The Case nos. 2 and 3 pegmatites are inferred to contain slightly more than 100 tons of beryl, mostly in small crystals. Recovery by hand-cobbing would unquestionably be difficult. Each of the three pegmatites contains limited tonnages of high-grade, hand separable [microcline] perthite, and the no. 2 pegmatite probably contains at least 6,000 tons of coarse milky quartz that appears to be of high purity and could be separated readily by hand.


Exploratory drilling to estimate beryl resources was done by the U. S. Bureau of Mines (Boos, Maillot & Mosier, 1949), but commercial beryl production was not recommended, beryl removal being limited to subsequent decades of specimen collecting.

The beryl crystals are colored white, yellow, pale to deep green, and pale to deep blue, with the blue to green colors being typical. The vast majority of crystals are frozen in matrix, but a few pocket crystals are known.

During the fall of 1983 a fourth pegmatite was discovered in the middle of the other three (Cross, 1987), amazingly missed by all the earlier drilling. It mostly consists of a massive, milky quartz core a few meters thick, with a relatively narrow, fine to coarse-grained, albite-microcline-smoky quartz-muscovite wall zone typically <0.2m thick. This pegmatite is very rich in beryl, and is worked by local mineral collectors for beryl crystals. It yields isolated or clusters of short hexagonal prisms, with basal pinacoids up to 15 cm across, terminated in the quartz core, where dozens of molds of removed beryls can be seen. These beryls have a subhedral, tapered "root" within the wall zone, with the crystals' c axes oriented subnormal to the steeply-dipping pegmatite contact. Cross (1987) reports individual crystals weighing over 22 kilograms.

Other pegmatite minerals, both common and rare, are reported in the references listed below. Particularly noteworthy are the bismuth mineral suite, small but usually excellent columbite-(Fe) crystals to 5 cm, sub to euhedral red-brown monazite-(Ce) crystals around 1 cm or so, and the very rare minerals liandratite and possibly petscheckite. These last two species are based on unpublished X-ray diffraction testing by Fred Davis.

The bismuth minerals occur together, being produced by successive weathering of primary bismuthinite, which occurs as lead-grey, metallic sectile masses. The bismite occurs here as tiny, light yellow or green massive fragments that are scaly or earthy. Bismutite reportedly is bright green and is found in thin scaly masses with a vitreous or pearly luster. Goethite is usually associated with them. Huff, Huff, & Vajdak (1996) report that pyrite is associated with the bismuthinite (apparently weathering into the goethite) and based on XRD and microprobe analyses, the bright green mineral reported as bismutite is bismutoferrite.

Collecting is allowed only via permit issued by the Connecticut DEEP to educational organizations (schools, mineral clubs, etc.). See link below.

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


34 valid minerals. 3 erroneous literature entries.

Detailed Mineral List:

Albite
Formula: Na(AlSi3O8)
Habit: mostly anhedral grains, rare blocky pocket crystals
Colour: white
Description: Largely a rock-forming component of the pegmatites. Rarely lining small pockets.
Reference: Cameron, Eugene N., Larrabee David M., McNair, Andrew H., Page, James T., Stewart, Glenn W., and Shainin, Vincent E. (1954), Pegmatite Investigations 1942-45 New England. USGS Professional Paper 255.; Stugard, Frederick, Jr. (1958), Pegmatites of the Middletown Area, Connecticut. USGS Bulletin 1042-Q.
Almandine
Formula: Fe2+3Al2(SiO4)3
Habit: trapezohedral
Colour: maroon
Description: Crystals usually very small and concentrated near border zones, but known to at least 3 cm. Not analyzed, but XRF data of many district pegmatitic garnets shows them to be mostly almandine but with a significant spessartine component.
Reference: Cameron, Eugene N., Larrabee David M., McNair, Andrew H., Page, James T., Stewart, Glenn W., and Shainin, Vincent E. (1954), Pegmatite Investigations 1942-45 New England. USGS Professional Paper 255.
Annite
Formula: KFe2+3(AlSi3O10)(OH)2
Habit: anhedral tabular
Colour: black
Description: fka biotite
Reference: Schooner, Richard. (1958), The Mineralogy of the Portland-East Hampton-Middletown-Haddam Area in Connecticut (With a few notes on Glastonbury and Marlborough). Published by Richard Schooner; Ralph Lieser of Pappy’s Beryl Shop, East Hampton; and Howard Pate of Fluorescent House, Branford, Connecticut.
Autunite
Formula: Ca(UO2)2(PO4)2 · 11H2O
Description: see meta-autunite
Reference: Schooner, Richard. (1958), The Mineralogy of the Portland-East Hampton-Middletown-Haddam Area in Connecticut (With a few notes on Glastonbury and Marlborough). Published by Richard Schooner; Ralph Lieser of Pappy’s Beryl Shop, East Hampton; and Howard Pate of Fluorescent House, Branford, Connecticut.
Beryl
Formula: Be3Al2(Si6O18)
Habit: elongated to short hexagonal prisms
Colour: colorless, yellow, green, blue
Description: Present in all the pegmatites, but particularly in the number 4 pegmatite where it occurs as isolated or clusters of short hexagonal prisms, with basal pinacoids up to 15 cm across, terminated in the quartz core, where dozens of molds of removed beryls can be seen. These beryls have a subhedral, tapered "root" within the wall zone, with the crystals' c axes oriented subnormal to the steeply-dipping pegmatite contact. Cross (1987) reports individual crystals weighing over 22 kilograms.
Reference: Cameron, Eugene N., Larrabee David M., McNair, Andrew H., Page, James T., Stewart, Glenn W., and Shainin, Vincent E. (1954), Pegmatite Investigations 1942-45 New England. USGS Professional Paper 255.; Schooner, Richard. (1958), The Mineralogy of the Portland-East Hampton-Middletown-Haddam Area in Connecticut (With a few notes on Glastonbury and Marlborough). Published by Richard Schooner; Ralph Lieser of Pappy’s Beryl Shop, East Hampton; and Howard Pate of Fluorescent House, Branford, Connecticut.; Cross, L. M. (1987), A New Occurrence of Beryl at Case Quarries, Portland, Connecticut. Rocks & Minerals: 62(2): 116-7.
Beryl var: Aquamarine
Formula: Be3Al2Si6O18
Habit: hexagonal prisms with pinacoids
Colour: blue-green to blue
Description: Present in all the pegmatites, but particularly in the number 4 pegmatite where it occurs as isolated or clusters of short hexagonal prisms, with basal pinacoids up to 15 cm across, terminated in the quartz core, where dozens of molds of removed beryls can be seen. These beryls have a subhedral, tapered "root" within the wall zone, with the crystals' c axes oriented subnormal to the steeply-dipping pegmatite contact. Cross (1987) reports individual crystals weighing over 22 kilograms.
Reference: Cameron, Eugene N., Larrabee David M., McNair, Andrew H., Page, James T., Stewart, Glenn W., and Shainin, Vincent E. (1954), Pegmatite Investigations 1942-45 New England. USGS Professional Paper 255.; Schooner, Richard. (1958), The Mineralogy of the Portland-East Hampton-Middletown-Haddam Area in Connecticut (With a few notes on Glastonbury and Marlborough). Published by Richard Schooner; Ralph Lieser of Pappy’s Beryl Shop, East Hampton; and Howard Pate of Fluorescent House, Branford, Connecticut.; Cross, L. M. (1987), A New Occurrence of Beryl at Case Quarries, Portland, Connecticut. Rocks & Minerals: 62(2): 116-7.
Beryl var: Heliodor
Formula: Be3Al2(Si6O18)
Habit: elongated to short hexagonal prisms
Colour: yellow
Description: Much less common than the green and blue varieties.
Reference: Cameron, Eugene N., Larrabee David M., McNair, Andrew H., Page, James T., Stewart, Glenn W., and Shainin, Vincent E. (1954), Pegmatite Investigations 1942-45 New England. USGS Professional Paper 255.; Schooner, Richard. (1958), The Mineralogy of the Portland-East Hampton-Middletown-Haddam Area in Connecticut (With a few notes on Glastonbury and Marlborough). Published by Richard Schooner; Ralph Lieser of Pappy’s Beryl Shop, East Hampton; and Howard Pate of Fluorescent House, Branford, Connecticut.
Bismite
Formula: Bi2O3
Habit: coatings
Colour: yellow
Description: as coatings on feldspar and quartz, an alteration product of bismutite.
Reference: Schooner, Richard. (1958), The Mineralogy of the Portland-East Hampton-Middletown-Haddam Area in Connecticut (With a few notes on Glastonbury and Marlborough). Published by Richard Schooner; Ralph Lieser of Pappy’s Beryl Shop, East Hampton; and Howard Pate of Fluorescent House, Branford, Connecticut.; Huff, R. C., R. G. Huff, J. Vajdak. (1996), An Occurrence of Bismutoferrite in Portland, Connecticut. Rocks & Minerals: 71(3): 197.; Rocks & Minerals (1955) 30:351-358
Bismuthinite
Formula: Bi2S3
Habit: platy to prismatic, striated masses and subhedral crystals
Colour: gray
Description: platy masses to striated crystals typically with green and yellow secondaries, in iron-stained pegmatite due to oxidation of associated pyrite.
Reference: Schooner, Richard. (1958), The Mineralogy of the Portland-East Hampton-Middletown-Haddam Area in Connecticut (With a few notes on Glastonbury and Marlborough). Published by Richard Schooner; Ralph Lieser of Pappy’s Beryl Shop, East Hampton; and Howard Pate of Fluorescent House, Branford, Connecticut.
Bismutite
Formula: (BiO)2CO3
Habit: massive, coatings
Colour: green
Description: Alteration of bismuthinite and associated with yellow bismite and goethite (from oxidation of associated pyrite). Schooner (1958) says the identity of this material was confirmed by an x-ray study, made at Harvard University by Mary E. Mrose.
Reference: Schooner, Richard. (1958), The Mineralogy of the Portland-East Hampton-Middletown-Haddam Area in Connecticut (With a few notes on Glastonbury and Marlborough). Published by Richard Schooner; Ralph Lieser of Pappy’s Beryl Shop, East Hampton; and Howard Pate of Fluorescent House, Branford, Connecticut.; Vajdak, Josef. (1997), New Mineral Finds in 1996, News from Vajdak of Pequa Rare Minerals and Metals. Mineral News: 13:(3): 1,4,5.
Bismutoferrite
Formula: Fe3+2Bi(SiO4)2(OH)
Habit: massive coatings
Colour: green
Description: Associated with bismuthinite and pyrite with secondary bismite, bismutite (some or all may in fact be bismutoferrite) and goethite staining pegmatite matrix.
Reference: Huff, R. C., R. G. Huff, J. Vajdak. (1996), An Occurrence of Bismutoferrite in Portland, Connecticut. Rocks & Minerals: 71(3): 197.; Vajdak, Josef. (1997), New Mineral Finds in 1996, News from Vajdak of Pequa Rare Minerals and Metals. Mineral News: 13:(3): 1,4,5.
Chalcopyrite
Formula: CuFeS2
Description: Included in a list by Schooner (1958) with no details, but very plausibly in small quantities.
Reference: Schooner, Richard. (1958), The Mineralogy of the Portland-East Hampton-Middletown-Haddam Area in Connecticut (With a few notes on Glastonbury and Marlborough). Published by Richard Schooner; Ralph Lieser of Pappy’s Beryl Shop, East Hampton; and Howard Pate of Fluorescent House, Branford, Connecticut.
Columbite-(Fe)
Formula: FeNb2O6
Habit: tabular to elongated prisms
Colour: black with iridescence
Description: Found in all the pegmatites usually to a couple of cm, the crystals typically subhedral when in matrix, euhedral crystals from pockets very rare but can reach 3 cm.
Reference: Cameron, Eugene N., Larrabee David M., McNair, Andrew H., Page, James T., Stewart, Glenn W., and Shainin, Vincent E. (1954), Pegmatite Investigations 1942-45 New England. USGS Professional Paper 255.
Cordierite
Formula: (Mg,Fe)2Al3(AlSi5O18)
Habit: elongated prisms
Colour: dark purple to gray (altered to gray-green on surface)
Description: Crystals to a few cm long found in a coarse-grained phase (albite, smoky quartz, cordierite, biotite) of the metamorphic rock surrounding the pegmatites.
Reference: Collection of David and Brenda Bodnar
Cuprobismutite
Formula: Cu8AgBi13S24
Habit: massive, coatings
Description: Associated with bismuthinite and pyrite with secondary bismite, bismutite (some or all may in fact be bismutoferrite) and goethite staining pegmatite matrix.
Reference: Vajdak, Josef. (1997), New Mineral Finds in 1996, News from Vajdak of Pequa Rare Minerals and Metals. Mineral News: 13:(3): 1,4,5.
Epidote
Formula: {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Habit: elongated, striated, prismatic
Colour: dark olive green
Description: Found in quartz-rich, retrograde metamorphic segregations in the Glastonbury gneiss hosting the pegmatites. Crystals to 4 cm.
Reference: Januzzi, Ronald E. (1976). Mineral Localities of Connecticut and Southeastern New York State. Mineralogical Press/Taylor Associates, Danbury, Connecticut.; Dave Bodnar collection.
'Feldspar Group'
Habit: anhedral to subhedral blocky
Colour: white, tan, pale pink
Description: aka - microcline. A major rock-forming component of the pegmatites, the largest and best crystals terminate in the quartz cores and can reach over 20 cm.
Reference: Cameron, Eugene N., Larrabee David M., McNair, Andrew H., Page, James T., Stewart, Glenn W., and Shainin, Vincent E. (1954), Pegmatite Investigations 1942-45 New England. USGS Professional Paper 255.
'Feldspar Group var: Perthite'
Habit: anhedral to subhedral blocky
Colour: white, tan, pale pink
Description: aka - microcline. A major rock-forming component of the pegmatites, the largest and best crystals terminate in the quartz cores and can reach over 20 cm.
Reference: Cameron, Eugene N., Larrabee David M., McNair, Andrew H., Page, James T., Stewart, Glenn W., and Shainin, Vincent E. (1954), Pegmatite Investigations 1942-45 New England. USGS Professional Paper 255.
Fluorapatite
Formula: Ca5(PO4)3F
Habit: massive
Colour: gray
Fluorescence: yellow
Description: Typically massive and inconspicuous, revealed by its yellow SW UV fluorescence.
Reference: Schooner, Richard. (1958), The Mineralogy of the Portland-East Hampton-Middletown-Haddam Area in Connecticut (With a few notes on Glastonbury and Marlborough). Published by Richard Schooner; Ralph Lieser of Pappy’s Beryl Shop, East Hampton; and Howard Pate of Fluorescent House, Branford, Connecticut.
Fluorapatite var: Mn-bearing Fluorapatite
Formula: (Ca,Mn2+)5(PO4)3(F,Cl,OH) or Ca5([P,Mn5+]O4)3(F,Cl,OH)
Habit: massive
Colour: gray
Fluorescence: yellow
Description: Typically massive and inconspicuous, revealed by its yellow SW UV fluorescence.
Reference: Jones, Robert W. Jr., (1960), Luminescent Minerals of Connecticut, A Guide to Their Properties and Locations. Fluorescent House. Branford, Connecticut.
Goethite
Formula: α-Fe3+O(OH)
Habit: massive, earthy, coatings
Colour: brown
Description: From the oxidation of pyrite associated with bismuth minerals.
Reference: Schooner, Richard. (1958), The Mineralogy of the Portland-East Hampton-Middletown-Haddam Area in Connecticut (With a few notes on Glastonbury and Marlborough). Published by Richard Schooner; Ralph Lieser of Pappy’s Beryl Shop, East Hampton; and Howard Pate of Fluorescent House, Branford, Connecticut.
'Hornblende'
Habit: subhedral elongated prisms
Colour: black
Description: Rock-forming component of the host Glastonbury Gneiss.
Reference: Schooner, Richard. (1958), The Mineralogy of the Portland-East Hampton-Middletown-Haddam Area in Connecticut (With a few notes on Glastonbury and Marlborough). Published by Richard Schooner; Ralph Lieser of Pappy’s Beryl Shop, East Hampton; and Howard Pate of Fluorescent House, Branford, Connecticut.
Liandratite
Formula: U(Nb,Ta)2O8
Habit: massive
Colour: yellow
Description: Associated with petscheckite and columbite.
Reference: Personal collection of Fred E Davis, and EDS analysis
'Limonite'
Formula: (Fe,O,OH,H2O)
Description: See goethite.
Reference: Schooner, Richard. (1958), The Mineralogy of the Portland-East Hampton-Middletown-Haddam Area in Connecticut (With a few notes on Glastonbury and Marlborough). Published by Richard Schooner; Ralph Lieser of Pappy’s Beryl Shop, East Hampton; and Howard Pate of Fluorescent House, Branford, Connecticut.
'Manganese Oxides'
Habit: dendritic coatings
Colour: black to dark brown
Reference: Harold Moritz collection
'Manganese Oxides var: Manganese Dendrites'
Habit: dendritic coatings
Colour: black to dark brown
Reference: Harold Moritz collection
Meta-autunite
Formula: Ca(UO2)2(PO4)2 · 6-8H2O
Habit: coatings
Colour: pale yellow
Fluorescence: bright green
Description: Alteration of uraninite. (All "autunite" in collections has dehydrated to meta-autunite.)
Reference: Schooner, Richard. (1958), The Mineralogy of the Portland-East Hampton-Middletown-Haddam Area in Connecticut (With a few notes on Glastonbury and Marlborough). Published by Richard Schooner; Ralph Lieser of Pappy’s Beryl Shop, East Hampton; and Howard Pate of Fluorescent House, Branford, Connecticut.
Metatorbernite
Formula: Cu(UO2)2(PO4)2 · 8H2O
Habit: coatings of micro crystals
Colour: green
Description: Alteration of uraninite. (All "torbernite" in collections has dehydrated to metatorbernite).
Reference: Schooner, Richard. (1958), The Mineralogy of the Portland-East Hampton-Middletown-Haddam Area in Connecticut (With a few notes on Glastonbury and Marlborough). Published by Richard Schooner; Ralph Lieser of Pappy’s Beryl Shop, East Hampton; and Howard Pate of Fluorescent House, Branford, Connecticut.
Microcline
Formula: K(AlSi3O8)
Habit: anhedral to subhedral blocky
Colour: white, tan, pale pink
Description: aka - perthite. A major rock-forming component of the pegmatites, the largest and best crystals terminate in the quartz cores and can reach over 20 cm.
Reference: Cameron, Eugene N., Larrabee David M., McNair, Andrew H., Page, James T., Stewart, Glenn W., and Shainin, Vincent E. (1954), Pegmatite Investigations 1942-45 New England. USGS Professional Paper 255.
Monazite-(Ce)
Formula: Ce(PO4)
Habit: subhedral to euhedral wedge-shaped
Colour: brown
Description: Crystals typically less than 2 cm and usually found loose in the dumps using gamma-ray detectors.
Reference: Fred E Davis - collection
Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Habit: tabular
Colour: silvery, gray-green, rum
Description: Rarely in euhedral crystals, mostly cleavages of subhedral crystals to 20 cm.
Reference: Cameron, Eugene N., Larrabee David M., McNair, Andrew H., Page, James T., Stewart, Glenn W., and Shainin, Vincent E. (1954), Pegmatite Investigations 1942-45 New England. USGS Professional Paper 255.
Opal
Formula: SiO2 · nH2O
Description: see Opal-AN variety.
Reference: Jones, Robert W. Jr., (1960), Luminescent Minerals of Connecticut, A Guide to Their Properties and Locations. Fluorescent House. Branford, Connecticut.
Opal var: Opal-AN
Formula: SiO2 · nH2O
Habit: coatings
Description: Colorless coatings found only by their bright green SW UV fluorescence.
Reference: Jones, Robert W. Jr., (1960), Luminescent Minerals of Connecticut, A Guide to Their Properties and Locations. Fluorescent House. Branford, Connecticut.
Orthoclase
Formula: K(AlSi3O8)
Description: Erroneously reported by old literature or casual collectors. Microcline has been verified by Cameron et al (1954) and Stugard (1958) as the only potassium feldspar for the entire Middletown pegmatite district.
Reference: Schooner, Richard. (1958), The Mineralogy of the Portland-East Hampton-Middletown-Haddam Area in Connecticut (With a few notes on Glastonbury and Marlborough). Published by Richard Schooner; Ralph Lieser of Pappy’s Beryl Shop, East Hampton; and Howard Pate of Fluorescent House, Branford, Connecticut.
Petscheckite ?
Formula: UFe(Nb,Ta)2O8
Habit: massive
Colour: black
Description: Glassy metamict material associated with liandratite and columbite. Data required to substantiate this entry.
Reference: Found by Fred Davis
Phosphuranylite
Formula: (H3O)3KCa(UO2)7(PO4)4O4 · 8H2O
Pyrite
Formula: FeS2
Description: Associated with bismuth minerals and altered to goethite.
Reference: Huff, R. C., R. G. Huff, J. Vajdak. (1996), An Occurrence of Bismutoferrite in Portland, Connecticut. Rocks & Minerals: 71(3): 197.
Pyrolusite
Formula: Mn4+O2
Description: No pyrolusite dendrite or staining in a granite pegmatite in the world has been verified as pyrolusite. The name was a mistake in the nineteenth century which has been widely publicized.
Reference: Schooner, Richard. (1958), The Mineralogy of the Portland-East Hampton-Middletown-Haddam Area in Connecticut (With a few notes on Glastonbury and Marlborough). Published by Richard Schooner; Ralph Lieser of Pappy’s Beryl Shop, East Hampton; and Howard Pate of Fluorescent House, Branford, Connecticut.
Quartz
Formula: SiO2
Habit: mostly massive, rare as prismatic crystals
Colour: colorless, milky, smoky
Description: Overwhelmingly a rock-forming component of the pegmatites, but a few pocket crystals known.
Reference: Cameron, Eugene N., Larrabee David M., McNair, Andrew H., Page, James T., Stewart, Glenn W., and Shainin, Vincent E. (1954), Pegmatite Investigations 1942-45 New England. USGS Professional Paper 255.
Quartz var: Milky Quartz
Formula: SiO2
Habit: massive
Colour: milky white
Description: Major rock forming component of the pegmatites, especially the core zones.
Reference: Schooner, Richard. (1958), The Mineralogy of the Portland-East Hampton-Middletown-Haddam Area in Connecticut (With a few notes on Glastonbury and Marlborough). Published by Richard Schooner; Ralph Lieser of Pappy’s Beryl Shop, East Hampton; and Howard Pate of Fluorescent House, Branford, Connecticut.
Quartz var: Smoky Quartz
Formula: SiO2
Habit: mostly massive, rarely prismatic
Colour: gray
Description: Overwhelmingly a rock-forming component of the pegmatites, but a few pocket crystals known.
Reference: Harold Moritz collection
Samarskite-(Y)
Formula: (Y,Fe3+,Fe2+,U,Th,Ca)2(Nb,Ta)2O8
Colour: black
Reference: Albini, Anthony J. (1979), Selected Pegmatite Quarries of the Central Connecticut Region. Masters thesis.
Schorl
Formula: Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
Habit: elongated prisms
Colour: black
Description: Usually as elongated subhedral prisms, poorly terminated, to a few cms. Typically found in the fine-grained wall zones and like the beryls oriented with their long axis sub-perpendicular to the contact with the host gneiss.
Reference: Cameron, Eugene N., Larrabee David M., McNair, Andrew H., Page, James T., Stewart, Glenn W., and Shainin, Vincent E. (1954), Pegmatite Investigations 1942-45 New England. USGS Professional Paper 255.
Spessartine ?
Formula: Mn2+3Al2(SiO4)3
Description: XRF analyses of many Middletown district pegmatites shows the majority to be almandine, though with significant spessartine component. No analyses verifying a spessartine from Case is documented.
Reference: Schooner, Richard. (1958), The Mineralogy of the Portland-East Hampton-Middletown-Haddam Area in Connecticut (With a few notes on Glastonbury and Marlborough). Published by Richard Schooner; Ralph Lieser of Pappy’s Beryl Shop, East Hampton; and Howard Pate of Fluorescent House, Branford, Connecticut.
'Tantalite'
Formula: (Mn,Fe)(Ta,Nb)2O6
Description: Listed generically by the references as part of the columbite-tantalite series. No analyses of end-member tantalite from Case are known.
Reference: Schooner, Richard. (1958), The Mineralogy of the Portland-East Hampton-Middletown-Haddam Area in Connecticut (With a few notes on Glastonbury and Marlborough). Published by Richard Schooner; Ralph Lieser of Pappy’s Beryl Shop, East Hampton; and Howard Pate of Fluorescent House, Branford, Connecticut.; Cameron, Eugene N., Larrabee David M., McNair, Andrew H., Page, James T., Stewart, Glenn W., and Shainin, Vincent E. (1954), Pegmatite Investigations 1942-45 New England. USGS Professional Paper 255.
'Thorogummite'
Formula: (Th,U)(SiO4)1-x(OH)4x
Colour: pale yellow
Description: Specimen in the collection of Andrew Kruegel identified by SEM-EDS.
Reference: Specimen in collection of Andrew Kruegel
Torbernite
Formula: Cu(UO2)2(PO4)2 · 12H2O
Description: see Meta-torbernite
Reference: Schooner, Richard. (1958), The Mineralogy of the Portland-East Hampton-Middletown-Haddam Area in Connecticut (With a few notes on Glastonbury and Marlborough). Published by Richard Schooner; Ralph Lieser of Pappy’s Beryl Shop, East Hampton; and Howard Pate of Fluorescent House, Branford, Connecticut.
Uraninite
Formula: UO2
Habit: subhedral
Colour: black
Description: Typically as small (<0.5 cm) grains best found using gamma-ray detectors.
Reference: Schooner, Richard. (1958), The Mineralogy of the Portland-East Hampton-Middletown-Haddam Area in Connecticut (With a few notes on Glastonbury and Marlborough). Published by Richard Schooner; Ralph Lieser of Pappy’s Beryl Shop, East Hampton; and Howard Pate of Fluorescent House, Branford, Connecticut.
Uranophane
Formula: Ca(UO2)2(SiO3OH)2 · 5H2O
Description: Alteration of uraninite, listed by Schooner (1958) with no details, but very plausible.
Reference: Schooner, Richard. (1958), The Mineralogy of the Portland-East Hampton-Middletown-Haddam Area in Connecticut (With a few notes on Glastonbury and Marlborough). Published by Richard Schooner; Ralph Lieser of Pappy’s Beryl Shop, East Hampton; and Howard Pate of Fluorescent House, Branford, Connecticut.
'Uranpyrochlore (of Hogarth 1977)'
Formula: (Ca,U,Ce)2(Nb,Ti,Ta)2O6(OH,F)
Description: Specimen in Andrew Kruegel collection identified by SEM-EDS.
Reference: Specimen in collection of Andrew Kruegel
Zircon
Formula: Zr(SiO4)
Description: See cyrtolite variety.
Reference: Schooner, Richard. (1958), The Mineralogy of the Portland-East Hampton-Middletown-Haddam Area in Connecticut (With a few notes on Glastonbury and Marlborough). Published by Richard Schooner; Ralph Lieser of Pappy’s Beryl Shop, East Hampton; and Howard Pate of Fluorescent House, Branford, Connecticut.
Zircon var: Cyrtolite
Formula: Zr[(SiO4),(OH)4]
Habit: curved crystals
Colour: pale brown
Fluorescence: yellow
Description: Generally very small but euhedral crystals.
Reference: Schooner, Richard. (1958), The Mineralogy of the Portland-East Hampton-Middletown-Haddam Area in Connecticut (With a few notes on Glastonbury and Marlborough). Published by Richard Schooner; Ralph Lieser of Pappy’s Beryl Shop, East Hampton; and Howard Pate of Fluorescent House, Branford, Connecticut.

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
Bismuthinite2.DB.05Bi2S3
Chalcopyrite2.CB.10aCuFeS2
Cuprobismutite2.JA.10aCu8AgBi13S24
'Pyrite'2.EB.05aFeS2
Group 4 - Oxides and Hydroxides
Bismite4.CB.60Bi2O3
Columbite-(Fe)4.DB.35FeNb2O6
Goethite4.00.α-Fe3+O(OH)
Liandratite4.DH.35U(Nb,Ta)2O8
Opal4.DA.10SiO2 · nH2O
var: Opal-AN4.DA.10SiO2 · nH2O
'Petscheckite' ?4.DH.35UFe(Nb,Ta)2O8
'Pyrolusite' ?4.DB.05Mn4+O2
'Quartz'4.DA.05SiO2
var: Milky Quartz4.DA.05SiO2
var: Smoky Quartz4.DA.05SiO2
'Samarskite-(Y)'4.DB.25(Y,Fe3+,Fe2+,U,Th,Ca)2(Nb,Ta)2O8
Uraninite4.DL.05UO2
Uranpyrochlore (of Hogarth 1977)4.DH.15(Ca,U,Ce)2(Nb,Ti,Ta)2O6(OH,F)
Group 5 - Nitrates and Carbonates
Bismutite5.BE.25(BiO)2CO3
Group 8 - Phosphates, Arsenates and Vanadates
Autunite8.EB.05Ca(UO2)2(PO4)2 · 11H2O
Fluorapatite8.BN.05Ca5(PO4)3F
var: Mn-bearing Fluorapatite8.BN.05(Ca,Mn2+)5(PO4)3(F,Cl,OH) or Ca5([P,Mn5+]O4)3(F,Cl,OH)
'Meta-autunite'8.EB.10Ca(UO2)2(PO4)2 · 6-8H2O
'Metatorbernite'8.EB.10Cu(UO2)2(PO4)2 · 8H2O
Monazite-(Ce)8.AD.50Ce(PO4)
'Phosphuranylite'8.EC.10(H3O)3KCa(UO2)7(PO4)4O4 · 8H2O
Torbernite8.EB.05Cu(UO2)2(PO4)2 · 12H2O
Group 9 - Silicates
'Albite'9.FA.35Na(AlSi3O8)
'Almandine'9.AD.25Fe2+3Al2(SiO4)3
'Annite'9.EC.20KFe2+3(AlSi3O10)(OH)2
Beryl9.CJ.05Be3Al2(Si6O18)
var: Aquamarine9.CJ.05Be3Al2Si6O18
var: Heliodor9.CJ.05Be3Al2(Si6O18)
Bismutoferrite9.ED.25Fe3+2Bi(SiO4)2(OH)
Cordierite9.CJ.10(Mg,Fe)2Al3(AlSi5O18)
Epidote9.BG.05a{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
'Microcline'9.FA.30K(AlSi3O8)
Muscovite9.EC.15KAl2(AlSi3O10)(OH)2
Orthoclase ?9.FA.30K(AlSi3O8)
'Schorl'9.CK.05Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
Spessartine ?9.AD.25Mn2+3Al2(SiO4)3
Uranophane9.AK.15Ca(UO2)2(SiO3OH)2 · 5H2O
Zircon9.AD.30Zr(SiO4)
var: Cyrtolite9.AD.30Zr[(SiO4),(OH)4]
Unclassified Minerals, Rocks, etc.
Feldspar Group-
'var: Perthite'-
Hornblende-
Limonite-(Fe,O,OH,H2O)
'Manganese Oxides'-
'var: Manganese Dendrites'-
Tantalite ?-(Mn,Fe)(Ta,Nb)2O6
Thorogummite-(Th,U)(SiO4)1-x(OH)4x

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmBnXp, with (m+n):p = 1:1
Chalcopyrite2.9.1.1CuFeS2
AmBnXp, with (m+n):p = 2:3
Bismuthinite2.11.2.3Bi2S3
AmBnXp, with (m+n):p = 1:2
Pyrite2.12.1.1FeS2
Group 3 - SULFOSALTS
1 < ø < 2
Cuprobismutite3.8.2.1Cu8AgBi13S24
Group 4 - SIMPLE OXIDES
A2X3
Bismite4.3.10.2Bi2O3
AX2
Pyrolusite ?4.4.1.4Mn4+O2
Group 5 - OXIDES CONTAINING URANIUM OR THORIUM
AXO2·xH2O
Uraninite5.1.1.1UO2
Group 6 - HYDROXIDES AND OXIDES CONTAINING HYDROXYL
XO(OH)
Goethite6.1.1.2α-Fe3+O(OH)
Group 8 - MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM
ABO4
Liandratite8.1.9.1U(Nb,Ta)2O8
Petscheckite ?8.1.9.2UFe(Nb,Ta)2O8
Samarskite-(Y)8.1.11.1(Y,Fe3+,Fe2+,U,Th,Ca)2(Nb,Ta)2O8
A2B2O6(O,OH,F)
'Uranpyrochlore (of Hogarth 1977)'8.2.1.7(Ca,U,Ce)2(Nb,Ti,Ta)2O6(OH,F)
AB2O6
Columbite-(Fe)8.3.2.2FeNb2O6
Group 16a - ANHYDROUS CARBONATES CONTAINING HYDROXYL OR HALOGEN
Bismutite16a.3.5.1(BiO)2CO3
Group 38 - ANHYDROUS NORMAL PHOSPHATES, ARSENATES, AND VANADATES
AXO4
Monazite-(Ce)38.4.3.1Ce(PO4)
Group 40 - HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
AB2(XO4)2·xH2O, containing (UO2)2+
Autunite40.2a.1.1Ca(UO2)2(PO4)2 · 11H2O
Meta-autunite40.2a.1.2Ca(UO2)2(PO4)2 · 6-8H2O
Metatorbernite40.2a.13.2Cu(UO2)2(PO4)2 · 8H2O
Torbernite40.2a.13.1Cu(UO2)2(PO4)2 · 12H2O
Group 41 - ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
A5(XO4)3Zq
Fluorapatite41.8.1.1Ca5(PO4)3F
Group 42 - HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
(AB)5(XO4)2Zq·xH2O
Phosphuranylite42.4.8.1(H3O)3KCa(UO2)7(PO4)4O4 · 8H2O
Group 51 - NESOSILICATES Insular SiO4 Groups Only
Insular SiO4 Groups Only with cations in [6] and >[6] coordination
Almandine51.4.3a.2Fe2+3Al2(SiO4)3
Spessartine ?51.4.3a.3Mn2+3Al2(SiO4)3
Insular SiO4 Groups Only with cations in >[6] coordination
'Thorogummite'51.5.2.5(Th,U)(SiO4)1-x(OH)4x
Zircon51.5.2.1Zr(SiO4)
Group 53 - NESOSILICATES Insular SiO4 Groups and Other Anions or Complex Cations
Insular SiO4 Groups and Other Anions of Complex Cations with (UO2)
Uranophane53.3.1.2Ca(UO2)2(SiO3OH)2 · 5H2O
Group 58 - SOROSILICATES Insular, Mixed, Single, and Larger Tetrahedral Groups
Insular, Mixed, Single, and Larger Tetrahedral Groups with cations in [6] and higher coordination; single and double groups (n = 1, 2)
Epidote58.2.1a.7{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Group 61 - CYCLOSILICATES Six-Membered Rings
Six-Membered Rings with [Si6O18] rings; possible (OH) and Al substitution
Beryl61.1.1.1Be3Al2(Si6O18)
Six-Membered Rings with Al substituted rings
Cordierite61.2.1.1(Mg,Fe)2Al3(AlSi5O18)
Six-Membered Rings with borate groups
Schorl61.3.1.10Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 1:1 layers
Bismutoferrite71.1.3.1Fe3+2Bi(SiO4)2(OH)
Sheets of 6-membered rings with 2:1 layers
Annite71.2.2b.3KFe2+3(AlSi3O10)(OH)2
Muscovite71.2.2a.1KAl2(AlSi3O10)(OH)2
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Si Tetrahedral Frameworks - SiO2 with H2O and organics
Opal75.2.1.1SiO2 · nH2O
Group 76 - TECTOSILICATES Al-Si Framework
Al-Si Framework with Al-Si frameworks
Albite76.1.3.1Na(AlSi3O8)
Microcline76.1.1.5K(AlSi3O8)
Orthoclase ?76.1.1.1K(AlSi3O8)
Unclassified Minerals, Rocks, etc.
Beryl
var: Aquamarine
-Be3Al2Si6O18
var: Heliodor-Be3Al2(Si6O18)
'Feldspar Group'-
'var: Perthite'-
Fluorapatite
var: Mn-bearing Fluorapatite
-(Ca,Mn2+)5(PO4)3(F,Cl,OH) or Ca5([P,Mn5+]O4)3(F,Cl,OH)
'Hornblende'-
'Limonite'-(Fe,O,OH,H2O)
'Manganese Oxides'-
'var: Manganese Dendrites'-
Opal
var: Opal-AN
-SiO2 · nH2O
Quartz
var: Milky Quartz
-SiO2
var: Smoky Quartz-SiO2
'Tantalite' ?-(Mn,Fe)(Ta,Nb)2O6
Zircon
var: Cyrtolite
-Zr[(SiO4),(OH)4]

List of minerals for each chemical element

HHydrogen
H AnniteKFe32+(AlSi3O10)(OH)2
H AutuniteCa(UO2)2(PO4)2 · 11H2O
H BismutoferriteFe23+Bi(SiO4)2(OH)
H Zircon (var: Cyrtolite)Zr[(SiO4),(OH)4]
H Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
H Goethiteα-Fe3+O(OH)
H Limonite(Fe,O,OH,H2O)
H Meta-autuniteCa(UO2)2(PO4)2 · 6-8H2O
H MetatorberniteCu(UO2)2(PO4)2 · 8H2O
H Fluorapatite (var: Mn-bearing Fluorapatite)(Ca,Mn2+)5(PO4)3(F,Cl,OH) or Ca5([P,Mn5+]O4)3(F,Cl,OH)
H MuscoviteKAl2(AlSi3O10)(OH)2
H OpalSiO2 · nH2O
H Opal (var: Opal-AN)SiO2 · nH2O
H Phosphuranylite(H3O)3KCa(UO2)7(PO4)4O4 · 8H2O
H SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
H Thorogummite(Th,U)(SiO4)1-x(OH)4x
H TorberniteCu(UO2)2(PO4)2 · 12H2O
H UranophaneCa(UO2)2(SiO3OH)2 · 5H2O
H Uranpyrochlore (of Hogarth 1977)(Ca,U,Ce)2(Nb,Ti,Ta)2O6(OH,F)
BeBeryllium
Be Beryl (var: Aquamarine)Be3Al2Si6O18
Be BerylBe3Al2(Si6O18)
Be Beryl (var: Heliodor)Be3Al2(Si6O18)
BBoron
B SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
CCarbon
C Bismutite(BiO)2CO3
OOxygen
O AlbiteNa(AlSi3O8)
O AlmandineFe32+Al2(SiO4)3
O AnniteKFe32+(AlSi3O10)(OH)2
O Beryl (var: Aquamarine)Be3Al2Si6O18
O AutuniteCa(UO2)2(PO4)2 · 11H2O
O BerylBe3Al2(Si6O18)
O BismiteBi2O3
O Bismutite(BiO)2CO3
O BismutoferriteFe23+Bi(SiO4)2(OH)
O Columbite-(Fe)FeNb2O6
O Cordierite(Mg,Fe)2Al3(AlSi5O18)
O Zircon (var: Cyrtolite)Zr[(SiO4),(OH)4]
O Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
O FluorapatiteCa5(PO4)3F
O Goethiteα-Fe3+O(OH)
O Beryl (var: Heliodor)Be3Al2(Si6O18)
O LiandratiteU(Nb,Ta)2O8
O Limonite(Fe,O,OH,H2O)
O Meta-autuniteCa(UO2)2(PO4)2 · 6-8H2O
O MetatorberniteCu(UO2)2(PO4)2 · 8H2O
O MicroclineK(AlSi3O8)
O Quartz (var: Milky Quartz)SiO2
O Fluorapatite (var: Mn-bearing Fluorapatite)(Ca,Mn2+)5(PO4)3(F,Cl,OH) or Ca5([P,Mn5+]O4)3(F,Cl,OH)
O Monazite-(Ce)Ce(PO4)
O MuscoviteKAl2(AlSi3O10)(OH)2
O OpalSiO2 · nH2O
O Opal (var: Opal-AN)SiO2 · nH2O
O OrthoclaseK(AlSi3O8)
O PetscheckiteUFe(Nb,Ta)2O8
O Phosphuranylite(H3O)3KCa(UO2)7(PO4)4O4 · 8H2O
O PyrolusiteMn4+O2
O QuartzSiO2
O Samarskite-(Y)(Y,Fe3+,Fe2+,U,Th,Ca)2(Nb,Ta)2O8
O SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
O Quartz (var: Smoky Quartz)SiO2
O SpessartineMn32+Al2(SiO4)3
O Tantalite(Mn,Fe)(Ta,Nb)2O6
O Thorogummite(Th,U)(SiO4)1-x(OH)4x
O TorberniteCu(UO2)2(PO4)2 · 12H2O
O UraniniteUO2
O UranophaneCa(UO2)2(SiO3OH)2 · 5H2O
O Uranpyrochlore (of Hogarth 1977)(Ca,U,Ce)2(Nb,Ti,Ta)2O6(OH,F)
O ZirconZr(SiO4)
FFluorine
F FluorapatiteCa5(PO4)3F
F Fluorapatite (var: Mn-bearing Fluorapatite)(Ca,Mn2+)5(PO4)3(F,Cl,OH) or Ca5([P,Mn5+]O4)3(F,Cl,OH)
F Uranpyrochlore (of Hogarth 1977)(Ca,U,Ce)2(Nb,Ti,Ta)2O6(OH,F)
NaSodium
Na AlbiteNa(AlSi3O8)
Na SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
MgMagnesium
Mg Cordierite(Mg,Fe)2Al3(AlSi5O18)
AlAluminium
Al AlbiteNa(AlSi3O8)
Al AlmandineFe32+Al2(SiO4)3
Al AnniteKFe32+(AlSi3O10)(OH)2
Al Beryl (var: Aquamarine)Be3Al2Si6O18
Al BerylBe3Al2(Si6O18)
Al Cordierite(Mg,Fe)2Al3(AlSi5O18)
Al Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Al Beryl (var: Heliodor)Be3Al2(Si6O18)
Al MicroclineK(AlSi3O8)
Al MuscoviteKAl2(AlSi3O10)(OH)2
Al OrthoclaseK(AlSi3O8)
Al SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
Al SpessartineMn32+Al2(SiO4)3
SiSilicon
Si AlbiteNa(AlSi3O8)
Si AlmandineFe32+Al2(SiO4)3
Si AnniteKFe32+(AlSi3O10)(OH)2
Si Beryl (var: Aquamarine)Be3Al2Si6O18
Si BerylBe3Al2(Si6O18)
Si BismutoferriteFe23+Bi(SiO4)2(OH)
Si Cordierite(Mg,Fe)2Al3(AlSi5O18)
Si Zircon (var: Cyrtolite)Zr[(SiO4),(OH)4]
Si Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Si Beryl (var: Heliodor)Be3Al2(Si6O18)
Si MicroclineK(AlSi3O8)
Si Quartz (var: Milky Quartz)SiO2
Si MuscoviteKAl2(AlSi3O10)(OH)2
Si OpalSiO2 · nH2O
Si Opal (var: Opal-AN)SiO2 · nH2O
Si OrthoclaseK(AlSi3O8)
Si QuartzSiO2
Si SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
Si Quartz (var: Smoky Quartz)SiO2
Si SpessartineMn32+Al2(SiO4)3
Si Thorogummite(Th,U)(SiO4)1-x(OH)4x
Si UranophaneCa(UO2)2(SiO3OH)2 · 5H2O
Si ZirconZr(SiO4)
PPhosphorus
P AutuniteCa(UO2)2(PO4)2 · 11H2O
P FluorapatiteCa5(PO4)3F
P Meta-autuniteCa(UO2)2(PO4)2 · 6-8H2O
P MetatorberniteCu(UO2)2(PO4)2 · 8H2O
P Fluorapatite (var: Mn-bearing Fluorapatite)(Ca,Mn2+)5(PO4)3(F,Cl,OH) or Ca5([P,Mn5+]O4)3(F,Cl,OH)
P Monazite-(Ce)Ce(PO4)
P Phosphuranylite(H3O)3KCa(UO2)7(PO4)4O4 · 8H2O
P TorberniteCu(UO2)2(PO4)2 · 12H2O
SSulfur
S BismuthiniteBi2S3
S ChalcopyriteCuFeS2
S CuprobismutiteCu8AgBi13S24
S PyriteFeS2
ClChlorine
Cl Fluorapatite (var: Mn-bearing Fluorapatite)(Ca,Mn2+)5(PO4)3(F,Cl,OH) or Ca5([P,Mn5+]O4)3(F,Cl,OH)
KPotassium
K AnniteKFe32+(AlSi3O10)(OH)2
K MicroclineK(AlSi3O8)
K MuscoviteKAl2(AlSi3O10)(OH)2
K OrthoclaseK(AlSi3O8)
K Phosphuranylite(H3O)3KCa(UO2)7(PO4)4O4 · 8H2O
CaCalcium
Ca AutuniteCa(UO2)2(PO4)2 · 11H2O
Ca Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Ca FluorapatiteCa5(PO4)3F
Ca Meta-autuniteCa(UO2)2(PO4)2 · 6-8H2O
Ca Fluorapatite (var: Mn-bearing Fluorapatite)(Ca,Mn2+)5(PO4)3(F,Cl,OH) or Ca5([P,Mn5+]O4)3(F,Cl,OH)
Ca Phosphuranylite(H3O)3KCa(UO2)7(PO4)4O4 · 8H2O
Ca Samarskite-(Y)(Y,Fe3+,Fe2+,U,Th,Ca)2(Nb,Ta)2O8
Ca UranophaneCa(UO2)2(SiO3OH)2 · 5H2O
Ca Uranpyrochlore (of Hogarth 1977)(Ca,U,Ce)2(Nb,Ti,Ta)2O6(OH,F)
TiTitanium
Ti Uranpyrochlore (of Hogarth 1977)(Ca,U,Ce)2(Nb,Ti,Ta)2O6(OH,F)
MnManganese
Mn Fluorapatite (var: Mn-bearing Fluorapatite)(Ca,Mn2+)5(PO4)3(F,Cl,OH) or Ca5([P,Mn5+]O4)3(F,Cl,OH)
Mn PyrolusiteMn4+O2
Mn SpessartineMn32+Al2(SiO4)3
Mn Tantalite(Mn,Fe)(Ta,Nb)2O6
FeIron
Fe AlmandineFe32+Al2(SiO4)3
Fe AnniteKFe32+(AlSi3O10)(OH)2
Fe BismutoferriteFe23+Bi(SiO4)2(OH)
Fe ChalcopyriteCuFeS2
Fe Columbite-(Fe)FeNb2O6
Fe Cordierite(Mg,Fe)2Al3(AlSi5O18)
Fe Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Fe Goethiteα-Fe3+O(OH)
Fe Limonite(Fe,O,OH,H2O)
Fe PetscheckiteUFe(Nb,Ta)2O8
Fe PyriteFeS2
Fe Samarskite-(Y)(Y,Fe3+,Fe2+,U,Th,Ca)2(Nb,Ta)2O8
Fe SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
Fe Tantalite(Mn,Fe)(Ta,Nb)2O6
CuCopper
Cu ChalcopyriteCuFeS2
Cu CuprobismutiteCu8AgBi13S24
Cu MetatorberniteCu(UO2)2(PO4)2 · 8H2O
Cu TorberniteCu(UO2)2(PO4)2 · 12H2O
YYttrium
Y Samarskite-(Y)(Y,Fe3+,Fe2+,U,Th,Ca)2(Nb,Ta)2O8
ZrZirconium
Zr Zircon (var: Cyrtolite)Zr[(SiO4),(OH)4]
Zr ZirconZr(SiO4)
NbNiobium
Nb Columbite-(Fe)FeNb2O6
Nb LiandratiteU(Nb,Ta)2O8
Nb PetscheckiteUFe(Nb,Ta)2O8
Nb Samarskite-(Y)(Y,Fe3+,Fe2+,U,Th,Ca)2(Nb,Ta)2O8
Nb Tantalite(Mn,Fe)(Ta,Nb)2O6
Nb Uranpyrochlore (of Hogarth 1977)(Ca,U,Ce)2(Nb,Ti,Ta)2O6(OH,F)
AgSilver
Ag CuprobismutiteCu8AgBi13S24
CeCerium
Ce Monazite-(Ce)Ce(PO4)
Ce Uranpyrochlore (of Hogarth 1977)(Ca,U,Ce)2(Nb,Ti,Ta)2O6(OH,F)
TaTantalum
Ta LiandratiteU(Nb,Ta)2O8
Ta PetscheckiteUFe(Nb,Ta)2O8
Ta Samarskite-(Y)(Y,Fe3+,Fe2+,U,Th,Ca)2(Nb,Ta)2O8
Ta Tantalite(Mn,Fe)(Ta,Nb)2O6
Ta Uranpyrochlore (of Hogarth 1977)(Ca,U,Ce)2(Nb,Ti,Ta)2O6(OH,F)
BiBismuth
Bi BismiteBi2O3
Bi BismuthiniteBi2S3
Bi Bismutite(BiO)2CO3
Bi BismutoferriteFe23+Bi(SiO4)2(OH)
Bi CuprobismutiteCu8AgBi13S24
ThThorium
Th Samarskite-(Y)(Y,Fe3+,Fe2+,U,Th,Ca)2(Nb,Ta)2O8
Th Thorogummite(Th,U)(SiO4)1-x(OH)4x
UUranium
U AutuniteCa(UO2)2(PO4)2 · 11H2O
U LiandratiteU(Nb,Ta)2O8
U Meta-autuniteCa(UO2)2(PO4)2 · 6-8H2O
U MetatorberniteCu(UO2)2(PO4)2 · 8H2O
U PetscheckiteUFe(Nb,Ta)2O8
U Phosphuranylite(H3O)3KCa(UO2)7(PO4)4O4 · 8H2O
U Samarskite-(Y)(Y,Fe3+,Fe2+,U,Th,Ca)2(Nb,Ta)2O8
U Thorogummite(Th,U)(SiO4)1-x(OH)4x
U TorberniteCu(UO2)2(PO4)2 · 12H2O
U UraniniteUO2
U UranophaneCa(UO2)2(SiO3OH)2 · 5H2O
U Uranpyrochlore (of Hogarth 1977)(Ca,U,Ce)2(Nb,Ti,Ta)2O6(OH,F)

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Boos, M. F., E. E. Maillot and McHenry Mosier. (1949), Investigation of Portland Beryl-Mica District, Middlesex County, Conn. US Bureau of Mines Report of Investigation 4425.
Cameron, Eugene N., Larrabee David M., McNair, Andrew H., Page, James T., Stewart, Glenn W., and Shainin, Vincent E. (1954), Pegmatite Investigations 1942-45 New England. USGS Professional Paper 255.
Schooner, Richard. (1955): 90 Minerals from 1 Connecticut Hill. Rocks & Minerals: 30(7-8): 351-8.
Schooner, Richard. (1958), The Mineralogy of the Portland-East Hampton-Middletown-Haddam Area in Connecticut (With a few notes on Glastonbury and Marlborough). Published by Richard Schooner; Ralph Lieser of Pappy’s Beryl Shop, East Hampton; and Howard Pate of Fluorescent House, Branford, Connecticut.
Stugard, Frederick, Jr. (1958), Pegmatites of the Middletown Area, Connecticut. USGS Bulletin 1042-Q.
Jones, Robert W., Jr. (1960), Luminescent Minerals of Connecticut, A Guide to Their Properties and Locations. Fluorescent House. Branford, Connecticut.
Schooner, Richard. (1961), The Mineralogy of Connecticut. Fluorescent House, Branford, Connecticut.
Ryerson, Kathleen. (1972): Rock Hound's Guide to Connecticut. Pequot Press.
Webster, Bud. (1978), Mineral Collector’s Field Guide Connecticut. Privately published.
Albini, Anthony J. (1979), Selected Pegmatite Quarries of the Central Connecticut Region. Masters thesis.
Webster, Bud and Bill Shelton. (1979), Mineral Collector’s Field Guide the Northeast.
Cross, L. M. (1987), A New Occurrence of Beryl at Case Quarries, Portland, Connecticut. Rocks & Minerals: 62(2): 116-7.
Robinson, George W. and Vandall T. King. (1988), What's New in Minerals? Mineralogical Record: 19(5): 332.
Weber, Marcelle H. and Earle C. Sullivan. (1995), Connecticut Mineral Locality Index. Rocks & Minerals (Connecticut Issue): 70(6): 403.
Huff, R. C., R. G. Huff, J. Vajdak. (1996), An Occurrence of Bismutoferrite in Portland, Connecticut. Rocks & Minerals: 71(3): 197.
Vajdak, Josef. (1997), New Mineral Finds in 1996, News from Vajdak of Pequa Rare Minerals and Metals. Mineral News: 13:(3): 1,4,5.
Davis, Fred E. (2000), June 17th Field Trip: Case Prospects. Triassic Valley Bulletin, New Haven Mineral Club.

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