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Hewitt Gem Quarry (Herb's Gem Quarry; Sawmill Quarry), Haddam, Middlesex Co., Connecticut, USAi
Regional Level Types
Hewitt Gem Quarry (Herb's Gem Quarry; Sawmill Quarry)Quarry
Haddam- not defined -
Middlesex Co.County
ConnecticutState
USACountry

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Key
Lock Map
Latitude & Longitude (WGS84): 41° 27' 10'' North , 72° 30' 38'' West
Latitude & Longitude (decimal): 41.45278,-72.51056
GeoHash:G#: drk7vfprv
Locality type:Quarry
Köppen climate type:Cfa : Humid subtropical climate


Herb Hewitt’s gem mine was a popular collecting place during the 1960s and 1970s and since 2013 has become one again. It is a group of small pegmatite quarries that boasted mineralogy and specimen quality similar to the famous Gillette Quarry across the river in Haddam Neck. Both are zoned pegmatites with cleavelandite and lithium enrichment and feature beryls with clear to pale green cores and pink overgrowths among other minerals.

Major activity apparently began around 1960 because it is mentioned briefly in Schooner (1961) but not at all in Schooner (1958). However, there was activity before then, as Williams (circa 1945) mentions that "At a Feldspar prospect on land of a Mr. Elly near Turkeyhill Road, green tourmaline in muscovite, lepidolite, smoky quartz, fine transparent crystals." Indeed, according to town records, the quarry was once owned by William Ely, and was sold to Ernest McNutt, by his daughter Alice Ely, in 1944. Ernest McNutt rented the quarry to the Hewitts for some years then sold it to them on March 28, 1960.

This is largely substantiated by Gregory (1966):

The outcropping was first worked in the early 1940's for feldspar by Mr. DeLucca who came from Maine. After selling two truck loads of feldspar to the Bon-Ami Company in Manchester, Connecticut, Mr. DeLucca had to give up the operation because of an accident. The old quarry was known as the Saw Mill Quarry. A saw mill was built here in the early 1950's to process the large trees in the area.

In August, 1961, Herbert Hewitt leased the land for mining and prospecting. He found that the dike of pegmatite extended underground quite some distance to the northeast. Mr. Hewitt and his brother have been working the quarry for the last four years, looking for strategic minerals needed for defense and the space age.


In the 1940s, apparently Mr. Ely owned it but Mr. DeLucca worked it.

To attract rockhounds to this fee collecting site, Herb Hewitt published advertisement fliers. The color ad featured a pile of multi-colored gem beryl rough, much of which was actually from the Roebling Quarry in Upper Merryall, which the Hewitts also worked.

The first technical description of it comes from Barton and Goldsmith (1968):

The Sawmill quarry … is in Haddam on the west flank of Long Hill about 300 feet east of Jail Hill Road and one-half mile north of Turkey Hill Cemetery. It is on a tract of approximately 23 acres owned by Ernest McNutt and under lease in 1963 to Howard Hewitt of Paterson, N.J. There has been small, intermittent production of gem beryl for several years prior to and during 1963.

The quarry area (fig. 32) is underlain by intercalated biotite and hornblende schists and gneisses interrupted by numerous, small pegmatite dikes and sills many of which have been prospected for gem beryl. The country rocks strike approximately north-south and schistosity and banding in the rocks range in dip from vertical to 45° E. The Sawmill Quarry is the only pegmatite on the hill which has been developed.

At the Sawmill Quarry a small sill has been opened by four small prospect pits. The sill strikes N 3° W and dips 45° to 86° E with the foliation of the enclosing rocks. It is exposed for 400 feet along strike and is about 10 feet thick. Because of its eastward dip it has not been explored to any extent downdip, where it runs beneath rising ground forming the west slope of Long Hill (also erroneously called Turkey Hill by local prospectors). The pegmatite is zoned, but poorly exposed in the rubble-strewn pits.

The pegmatite was estimated to contain 0.1 to 0.2 percent beryl. Much of it was beautiful blue, green, white, pink, and multicolored doubly terminated gem and specimen crystals. The multicolored beryl has a green core, and white prism faces grading to pink at either end. Crystals averaged about 1 by 3 inches, but were up to 10 inches long.


Taber (1971) described and economically assessed the pegmatite for the Hewitts:

The principal pegmatite body...is exposed in two pits totalling about 150 feet in length, up to 30 feet wide, and over 15 feet deep. The widest part, the north end, is split in two by a large horst or sliver of country rock occupying the middle third of the body. The pegmatite trends north-south and dips steeply eastward. Both ends are covered.

The mineralogy is complex: contained minerals are, feldspar (both plagioclase and orthoclose groups of various colors, including white, tan, green, gray, orange, pink), quartz (including smoky), muscovite, tourmaline (black and golden), beryl (green, aquamarine, yellow, colorless), red garnet, red fluorite, lepidolite, and many others not identified by the writer. Many of the beryls are large enough (over 1 inch diameter) and of gem quality, but fractured by blasting.

No commercial product in volume has been produced from this body so far and the writer has doubts if any will be. However, pegmatites are notoriously unpredictable. In general, the feldspar masses are too small and impure, muscovite books and masses are too small and scattered, and the tenor of the beryl is too low and crystals too small for hand cobbing to upgrade any of these products profitably. However, the variety of minerals and the gem qualities of beryl and tourmaline make the pit a favorite for rockhounds. Also, the pegmatite rock itself has been used as a rock garden stone and a market of a few hundred tons a year can be easily developed.


Herb Hewitt reportedly lived at the quarry during the 1960's and after he passed away in the early 1970's, his brother, Howard, took over trying to promote the quarry for a while and was in his 80's at the time. Howard never worked the quarry as Herb had. The heyday of this locality came to an end when Howard died in 1981. His widow, Emily Hewitt, inherited the land and she used the southern half of the land, #220 Turkey Hill Road, to build the Valley Evangelical Free Church. She sold the northern half, #202 Turkey Hill Road, which contains most if not all of the Hewitt Quarry, to Joseph Mazzotta of Middletown. Aerial photos from 2012 show that the site was abandoned with the pits partially filled in, but most of the dumps remain.

In 2013, James Sipperly introduced Anthony J. Albini and Ray Meyers to owner Joseph Mazzotta. Thereafter, A. J. Albini and Jim Sipperly reviewed the dumps and Joseph Mazzotta started to bulldoze the dumps under A. J. Albini's direction. Since then, several mineral club field trips have been allowed in 2014-15 under owner supervision. As a result, much new material has come to light, including amazonite, several varieties of beryl, masses of deep red to almost black chlorophane, and pockets with smoky quartz. The current owner doesn't want people collecting there (outside of some scheduled field trips) because of hunters in the area.

In 2015, several collectors found the pink, fibrous, lithium-rich muscovite variety "schernikite", first described at the Gillette quarry, in a miarolitic cavity with elbaite to 15 cm, including the "Trick or Treat Pocket" on October 31. In many ways the mineralization at Hewitt is similar to that at Gillette, which is located only 2.7 miles directly North.

Regions containing this locality

North America Plate

Plate - 4,950 mineral species & varietal names listed

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Commodity List

This is a list of exploitable or exploited mineral commodities recorded at this locality.


Mineral List


30 valid minerals.

Detailed Mineral List:

Albite
Formula: Na(AlSi3O8)
Habit: fine granular, to coarse blocky
Colour: white to very pale blue when granular and wet
Description: Stugard (1958) established through sampling various pegmatites that albite is the plagioclase of the Middletown Pegmatite District, though this location was not sampled it is in the district. An aplitic zone consists primarily of this mineral, with an intermediate zone containing coarser, blocky anhedral crystals.
Reference: Harold Moritz collection Stugard, Frederick, Jr. (1958) PEGMATITES OF THE MIDDLETOWN AREA, CONNECTICUT. USGS Bulletin 1042-Q.
Albite var: Cleavelandite
Formula: Na(AlSi3O8)
Habit: platy
Colour: white to very pale blue
Description: Found in scattered areas that grade into the aplitic zone.
Reference: Harold Moritz collection
Almandine
Formula: Fe2+3Al2(SiO4)3
Reference: Shelton, William. (1967): Notes on a Find at Haddam. Rocks and Minerals: 42(7): 502-3.
Annite
Formula: KFe2+3(AlSi3O10)(OH)2
Description: fka biotite, mostly as grains in the surrounding gneiss
Reference: Shelton, William. (1967): Notes on a Find at Haddam. Rocks and Minerals: 42(7): 502-503.
Bavenite
Formula: Ca4Be2Al2Si9O26(OH)2
Description: Alteration of beryl.
Reference: Weber, Marcelle H. and Earle C. Sullivan. (1995): Connecticut Mineral Locality Index. Rocks & Minerals (Connecticut Issue): 70(6): 402.
Bertrandite
Formula: Be4(Si2O7)(OH)2
Habit: complex micro-crystals
Colour: colorless
Description: Typically as secondary micro-crystals from alteration of beryl.
Reference: Weber, Marcelle H. and Earle C. Sullivan. (1995): Connecticut Mineral Locality Index. Rocks & Minerals (Connecticut Issue): 70(6): 402.
Beryl
Formula: Be3Al2(Si6O18)
Habit: anhedral to subhedral elongated prisms, terminations rounded to partially pyramidal with pinacoid, or fully pinacoidal.
Colour: colorless, pale green, blue, pink
Description: Crystals to several cm, best are found in the aplitic zone, or at the intermediate/quartz core zone contact.
Reference: Weber, Marcelle H. and Earle C. Sullivan. (1995): Connecticut Mineral Locality Index. Rocks & Minerals (Connecticut Issue): 70(6): 402.
Beryl var: Aquamarine
Formula: Be3Al2Si6O18
Habit: elongated prisms with pinacoid terminations
Colour: blue
Description: Mostly gem rough to subhedral crystals usually frozen in matrix, especially in the intermediate zone.
Reference: Harold Moritz field observations and collection
Beryl var: Goshenite
Formula: Be3Al2(Si6O18)
Habit: elongated prisms as cores of morganite crystals
Colour: colorless
Description: Subhedral crystals to several cm, in aplitic zone or near the intermediate/quartz core zone boundary.
Reference: Harold Moritz collection
Beryl var: Heliodor
Formula: Be3Al2(Si6O18)
Description: Subhedral crystals to several cm, in aplitic zone or near the intermediate/quartz core zone boundary.
Reference: Shelton, William. (1967): Notes on a Find at Haddam. Rocks and Minerals: 42(7): 502-503.
Beryl var: Morganite
Formula: Be3Al2(Si6O18)
Habit: elongated prisms as overgrowths on goshenite or pale green beryl, terminated by pedion and pyramidal faces
Colour: pink
Description: Subhedral crystals to several cm, in aplitic zone or near the intermediate/quartz core zone boundary.
Reference: Hewitt, Herb. (circa 1960s): Hewitt Gem Mine advertisement flyer.; Harold Moritz field observations 2015.
'commodity:Beryllium'
Formula: Be
Reference:  
'commodity:Bismuth'
Formula: Bi
Reference:  
Bismuthinite
Formula: Bi2S3
Habit: acicular
Colour: metallic gray
Description: Irregular masses or crystals that may be all or mostly altered to bismutite or perhaps bismite.
Reference: Seaman, David (1976): "Pegmatite Minerals of the World" in: Januzzi, Ronald E. and David Seaman.(1976): Mineral Localities of Connecticut and Southeastern New York State and Pegmatite Minerals of the World. (The Mineralogical Press: Danbury, Connecticut).
Bismutite
Formula: (BiO)2CO3
Habit: massive replacement of bismuthinite
Colour: white, pale yellow, green
Description: Masses several cm across found in the aplitic zone of the pegmatite. Wet chemical analysis showed it is all bismutite with no remnants of the original mineral, which did not have the elongated crystal habit typical of bismuthinite. X-ray analyses of similar specimens from the area proved to be all bismutite despite the color variation.
Reference: Tom Benedict collection, Harold Moritz collection
Bismutotantalite
Formula: Bi(Ta,Nb)O4
Habit: anhedral
Colour: gray exterior, brown interior
Description: Very small grains to a couple of mm in matrix of albite, muscovite, quartz, elbaite. Analyzed in 2017 by Peter Cristofono and Tom Mortimer.
Reference: Eric Briggs collection
'commodity:Caesium'
Formula: Cs
Reference:  
'Calciomicrolite'
Colour: brown
Description: A single 21mm fragment was analyzed via SEM-EDS and best match is calciomicrolite. Whether this is characteristic of all the abundant micro-crystals posted as "microlite" is uncertain. Zones within it were also analyzed and showed a Ca-Ta oxide with minor Nb (and no Na or Ti)...this could also be microlite, or perhaps calciotantite, which can occur as an inclusion in microlite.
Reference: Adam Berluti collection
'Chlorite Group'
Reference: from country rock
'commodity:Coltan (Columbite-Tantalite)'
Reference:  
'Columbite-(Fe)-Columbite-(Mn) Series'
Colour: black
Description: Typically as small crystals.
Reference: Harold Moritz collection
Cookeite
Formula: (Al2Li)Al2(AlSi3O10)(OH)8
Habit: micro globules and aggregates
Colour: pale yellow, rarely rosy
Description: mostly found waxy aggregates and globules with schernikite and elbaite in miarolitic cavities
Reference: Leif DeValentino collection
Elbaite
Formula: Na(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
Habit: elongated prisms, mostly non-terminated. Crystals from miarolitic cavities show mostly trigonal pyramidal terminations (antilogous pole) with capillary parallel growth. A few show pedion terminations (analogous pole).
Colour: dark green prisms. Terminated crystals show lighter green near analogous pole, thin blue cap at the antilogous pole.
Description: Very dark, hard to tell from schorl, or as an overgrowth on it. On Halloween 2015 a miarolitic cavity was opened that contained terminated elbaite/schorl crystals to 15 cm enveloped by crystalline schernikite aggregates.
Reference: Weber, Marcelle H. and Earle C. Sullivan. (1995): Connecticut Mineral Locality Index. Rocks & Minerals (Connecticut Issue): 70(6): 403.
Fluorapatite
Formula: Ca5(PO4)3F
Habit: massive to subhedral prismatic
Colour: pale gray-green
Fluorescence: yellow in SW
Description: Usually as masses or small crystals in the aplitic zone.
Reference: Kevin Czaja Collection
Fluorite
Formula: CaF2
Colour: red
Description: see variety chlorophane for details
Reference: Seaman, David (1976): "Pegmatite Minerals of the World" in: Januzzi, Ronald E. and David Seaman.(1976): Mineral Localities of Connecticut and Southeastern New York State and Pegmatite Minerals of the World. (The Mineralogical Press: Danbury, Connecticut).
Fluorite var: Chlorophane
Formula: CaF2
Habit: anhedral to modified octahedral
Colour: micro crystals colorless to pale pink with purple zones at the tips, larger crystals and masses are red to reddish black
Fluorescence: blue-green in SW, purple in LW, green phosphorescence
Description: Crystals mostly micros in pockets in the aplitic zone, larger crystals to a few cm rare, but they typically crumble into fragments when found. Typically as irregular masses to 10 cm. SW fluorescence is eventually lost if left exposed to any light, so immediately place and keep any finds in an opaque container to preserve this property.
Reference: Hewitt, Herb. (circa 1960s): Hewitt Gem Mine advertisement flyer.; Harold Moritz field observations 2015.
'commodity:Gemstones'
Reference:  
'K Feldspar'
Habit: wedge-shaped
Colour: white
Description: In hexagonal voids from dissolved beryl, with clays and bertrandite.
Reference: Harold Moritz collection
'K Feldspar var: Adularia'
Formula: KAlSi3O8
Habit: wedge-shaped
Colour: white
Description: In hexagonal voids from dissolved beryl, with clays and bertrandite.
Reference: Harold Moritz collection
'Lepidolite'
Habit: granular
Colour: pink
Description: Thin bands in massive pollucite, scattered in aplitic zone.
Reference: Hewitt, Herb. (circa 1960s): Hewitt Gem Mine advertisement flyer.
Maghemite
Formula: Fe3+2O3
Habit: massive
Colour: brown
Description: Alteration of magnetite found on biotite gneiss in the rock quarry uphill from the pegmatite. Referenced and photographed by Weissmand and Nikischer of Excalibur Mineral Corp. Harold Moritz collection contains a similar specimen purchased from them.
Reference: Weissman, Jeffrey G. and Anthony Nikischer. (2005): PHOTOGRAPHIC GUIDE TO MINERAL SPECIES. 2nd edition. CD distributed by Excalibur Mineral Corporation.
Magnetite
Formula: Fe2+Fe3+2O4
Habit: massive
Colour: black
Description: In layers in biotite gneiss uphill from the pegmatite quarry. Some alteration to maghemite.
Reference: Hewitt, Herb. (circa 1960s): Hewitt Gem Mine advertisement flyer.; Harold Moritz collection.
'Manganese Oxides'
Reference: Kevin Czaja Collection
'Manganese Oxides var: Manganese Dendrites'
Reference: Kevin Czaja Collection
Meta-autunite
Formula: Ca(UO2)2(PO4)2 · 6-8H2O
Habit: flaky, encrustation
Colour: yellow-green
Fluorescence: bright green under SW UV
Description: flaky crystals surrounding uraninite
Reference: Harold Moritz collection
Metatorbernite
Formula: Cu(UO2)2(PO4)2 · 8H2O
Habit: tabular
Colour: emerald green
Description: Coating of mm-scale micro-crystals on one face of a 5-6 cm fragment of pegmatite from the dump.
Reference: Harold Moritz field observation
Microcline
Formula: K(AlSi3O8)
Habit: massive to subhedral
Colour: tan to pale green or yellow-green
Description: Stugard (1958) established through sampling various pegmatites that microcline is the K-feldspar of the Middletown Pegmatite District, though this location was not sampled. Much of it is rock forming grains, except at the intermediate/quartz core zone boundary where inward oriented, subhedral prismatic crystals to 30 cm grade into the amazonite variety.
Reference: Seaman, David (1976): "Pegmatite Minerals of the World" in: Januzzi, Ronald E. and David Seaman.(1976): Mineral Localities of Connecticut and Southeastern New York State and Pegmatite Minerals of the World. (The Mineralogical Press: Danbury, Connecticut).; Harold Moritz field observations 2015.
Microcline var: Amazonite
Formula: K(AlSi3O8)
Habit: massive to subhedral prismatic
Colour: pale green
Description: Concentrated at the intermediate/quartz core zone boundary where inward oriented, subhedral prismatic crystals reach 30 cm. Color is generally pale and patchy within crytals, but some zones approach aqua.
Reference: Weber, Marcelle H. and Earle C. Sullivan. (1995): Connecticut Mineral Locality Index. Rocks & Minerals (Connecticut Issue): 70(6): 403
'Microlite Group'
Formula: A2-mTa2X6-wZ-n
Habit: octahedral modified by dodecahedron, cube and other isometric forms
Colour: brown to yellow
Description: Typically as micro-crystals but can reach 8mm, most easily found in the aplitic zone, but in the intermediate zone and core margin also. One specimen, a fragment about 15mm (!) across, was analyzed via SEM-EDS and proved to be calciomicrolite.
Reference: Seaman, David (1976): "Pegmatite Minerals of the World" in: Januzzi, Ronald E. and David Seaman.(1976): Mineral Localities of Connecticut and Southeastern New York State and Pegmatite Minerals of the World. (The Mineralogical Press: Danbury, Connecticut).
Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Colour: silvery to pale brown or green
Description: Generally as part of the rock and not very collectible here.
Reference: Harold Moritz collection
Muscovite var: Schernikite
Formula: KAl2(AlSi3O10)(OH)2
Habit: Fibrous crystals with rhombic cross-section formed in parallel growths that resemble waxy columns.
Colour: Pale pink.
Description: Commonly found as thin coatings on feldspar frozen in the mineralogically complex zone, and rarely as crystalline aggregates in miarolitic cavities with elbaite. Most of the "lepidolite" (none have been analyzed) from here is likely schernikite.
Reference: Adam Berlutti collection
Opal
Formula: SiO2 · nH2O
Habit: encrustations
Colour: colorless
Fluorescence: green under SW
Description: As coatings only readily visible when fluorescing under SW UV light.
Reference: Kevin Czaja Collection
Opal var: Opal-AN
Formula: SiO2 · nH2O
Habit: encrustations
Colour: colorless
Fluorescence: green under SW
Description: As coatings only readily visible when fluorescing under SW UV light.
Reference: Kevin Czaja Collection
Phlogopite
Formula: KMg3(AlSi3O10)(OH)2
Description: reported as a small amount, probably in the enclosing schist at pegmatites are notoriously Mg-poor.
Reference: Shelton, William. (1967): Notes on a Find at Haddam. Rocks and Minerals: 42(7): 502-503.
Pollucite
Formula: (Cs,Na)2(Al2Si4O12) · 2H2O
Habit: massive, granular
Colour: white
Description: White masses identified by the inclusion of thin bands of lepidolite.
Reference: Weber, Marcelle H. and Earle C. Sullivan. (1995): Connecticut Mineral Locality Index. Rocks & Minerals (Connecticut Issue): 70(6): 402.
Quartz
Formula: SiO2
Habit: massive to euhedral prismatic or scepter overgrowths
Colour: smoky
Description: Mostly massive as part of the pegmatite matrix, but good pocket crystals are found at the outer edge of the quartz core zone near the amazonite crystals. Crystals to over 30 cm can form parts of the pocket walls, though most loose crystals are up to several cm. Can be doubly-terminated or complex scepters.
Reference: Seaman, David (1976): "Pegmatite Minerals of the World" in: Januzzi, Ronald E. and David Seaman.(1976): Mineral Localities of Connecticut and Southeastern New York State and Pegmatite Minerals of the World. (The Mineralogical Press: Danbury, Connecticut).; Harold Moritz field observations.
Quartz var: Smoky Quartz
Formula: SiO2
Habit: anhedral to euhedral prismatic or scepter overgrowths
Colour: smoky brown
Description: Mostly massive as part of the pegmatite matrix, but excellent pocket crystals are found at the outer edge of the quartz core zone near the amazonite crystals. Transparent crystals to over 30 cm, though most loose crystals are up to several cm. They can be doubly-terminated or complex scepters.
Reference: Seaman, David (1976): "Pegmatite Minerals of the World" in: Januzzi, Ronald E. and David Seaman.(1976): Mineral Localities of Connecticut and Southeastern New York State and Pegmatite Minerals of the World. (The Mineralogical Press: Danbury, Connecticut).; Harold Moritz field observations.
'Rubellite'
Formula: A(D3)G6(T6O18)(BO3)3X3Z
Reference: Shelton, William. (1967): Notes on a Find at Haddam. Rocks and Minerals: 42(7): 502-503.
Schorl
Formula: Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
Habit: elongated prisms
Colour: black
Description: Grades into very dark elbaite. Crystals rarely terminated, can reach 10 cm.
Reference: Harold Moritz collection
Sillimanite
Formula: Al2(SiO4)O
Habit: radiating blades
Colour: gray-green
Description: Fan-shaped aggregates of radiating crystals about 1-1.5 cm wide and 15 cm long frozen in quartz. Found in a glacial boulder near the quarry, which was not transported far from its source because a belt of rock containing quartz-sillimanite nodules was mapped by Lundrgen (1979) not far to the west.
Reference: Harold Moritz collection
Spessartine
Formula: Mn2+3Al2(SiO4)3
Habit: trapezohedral
Colour: deep red to orange-red
Description: Usually found as tiny orange crystals in the aplitic zone. One larger, reddish crystal analysed by XRF by Harold Moritz has an Mn to Fe ratio of 52/48%.
Reference: Seaman, David (1976): "Pegmatite Minerals of the World" in: Januzzi, Ronald E. and David Seaman.(1976): Mineral Localities of Connecticut and Southeastern New York State and Pegmatite Minerals of the World. (The Mineralogical Press: Danbury, Connecticut).; Harold Moritz collection.
Tantalite-(Mn)
Formula: Mn2+Ta2O6
Habit: Tabular prism
Colour: very dark maroon
Description: Slightly translucent microcrystals to a few mm in granular albite zone.
Reference: Leif DeValentino collection
Topaz ?
Formula: Al2(SiO4)(F,OH)2
Colour: blue or colorless
Description: Usually well formed blueish to clear crystals in small cavities to 2cm in width. However, intensive collecting after 2013 has not turned up any topaz, but plenty of albite and cleavelandite that fits this description.
Reference: Weber, Marcelle H. and Earle C. Sullivan. (1995), Connecticut Mineral Locality Index. Rocks & Minerals (Connecticut Issue): 70(6): 402.
'Tourmaline'
Formula: A(D3)G6(T6O18)(BO3)3X3Z
Reference: Shelton, William. (1967): Notes on a Find at Haddam. Rocks and Minerals: 42(7): 502-503.
Uraninite
Formula: UO2
Habit: crudely octahedral
Colour: black
Description: small crystals a few mm surrounded by iron hydroxide stain and flaky meta-autunite crystals.
Reference: Harold Moritz collection
'commodity:Uranium'
Formula: U
Reference:  
Zircon
Formula: Zr(SiO4)
Reference: P. Cristofono collection, 2014
Zircon var: Cyrtolite
Formula: Zr[(SiO4),(OH)4]
Description: Tiny crystals usually in the aplitic zone.
Reference: Shelton, William. (1967): Notes on a Find at Haddam. Rocks and Minerals: 42(7): 502-503.
'commodity:Zircon'
Reference:  

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
Bismuthinite2.DB.05Bi2S3
Group 3 - Halides
Fluorite3.AB.25CaF2
var: Chlorophane3.AB.25CaF2
Group 4 - Oxides and Hydroxides
Bismutotantalite4.DE.30Bi(Ta,Nb)O4
Maghemite4.BB.15Fe3+2O3
Magnetite4.BB.05Fe2+Fe3+2O4
'Microlite Group'4.00.A2-mTa2X6-wZ-n
Opal4.DA.10SiO2 · nH2O
var: Opal-AN4.DA.10SiO2 · nH2O
Quartz4.DA.05SiO2
var: Smoky Quartz4.DA.05SiO2
Tantalite-(Mn)4.DB.35Mn2+Ta2O6
Uraninite4.DL.05UO2
Group 5 - Nitrates and Carbonates
Bismutite5.BE.25(BiO)2CO3
Group 8 - Phosphates, Arsenates and Vanadates
Fluorapatite8.BN.05Ca5(PO4)3F
'Meta-autunite'8.EB.10Ca(UO2)2(PO4)2 · 6-8H2O
'Metatorbernite'8.EB.10Cu(UO2)2(PO4)2 · 8H2O
Group 9 - Silicates
'Albite'9.FA.35Na(AlSi3O8)
var: Cleavelandite9.FA.35Na(AlSi3O8)
'Almandine'9.AD.25Fe2+3Al2(SiO4)3
Annite9.EC.20KFe2+3(AlSi3O10)(OH)2
Bavenite9.DF.25Ca4Be2Al2Si9O26(OH)2
Bertrandite9.BD.05Be4(Si2O7)(OH)2
Beryl9.CJ.05Be3Al2(Si6O18)
var: Aquamarine9.CJ.05Be3Al2Si6O18
var: Goshenite9.CJ.05Be3Al2(Si6O18)
var: Heliodor9.CJ.05Be3Al2(Si6O18)
var: Morganite9.CJ.05Be3Al2(Si6O18)
Cookeite9.EC.55(Al2Li)Al2(AlSi3O10)(OH)8
Elbaite9.CK.05Na(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
'Microcline'9.FA.30K(AlSi3O8)
var: Amazonite9.FA.30K(AlSi3O8)
Muscovite9.EC.15KAl2(AlSi3O10)(OH)2
var: Schernikite9.EC.15KAl2(AlSi3O10)(OH)2
Phlogopite9.EC.20KMg3(AlSi3O10)(OH)2
Pollucite9.GB.05(Cs,Na)2(Al2Si4O12) · 2H2O
Schorl9.CK.05Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
Sillimanite9.AF.05Al2(SiO4)O
Spessartine9.AD.25Mn2+3Al2(SiO4)3
Topaz ?9.AF.35Al2(SiO4)(F,OH)2
Zircon9.AD.30Zr(SiO4)
var: Cyrtolite9.AD.30Zr[(SiO4),(OH)4]
Unclassified Minerals, Rocks, etc.
Calciomicrolite-
Chlorite Group-
Columbite-(Fe)-Columbite-(Mn) Series-
K Feldspar-
'var: Adularia'-KAlSi3O8
Lepidolite-
'Manganese Oxides'-
'var: Manganese Dendrites'-
Rubellite-A(D3)G6(T6O18)(BO3)3X3Z
Tourmaline-A(D3)G6(T6O18)(BO3)3X3Z

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmBnXp, with (m+n):p = 2:3
Bismuthinite2.11.2.3Bi2S3
Group 4 - SIMPLE OXIDES
A2X3
Maghemite4.3.7.1Fe3+2O3
Group 5 - OXIDES CONTAINING URANIUM OR THORIUM
AXO2·xH2O
Uraninite5.1.1.1UO2
Group 7 - MULTIPLE OXIDES
AB2X4
Magnetite7.2.2.3Fe2+Fe3+2O4
Group 8 - MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM
ABO4
Bismutotantalite8.1.6.3Bi(Ta,Nb)O4
A2B2O6(O,OH,F)
'Microlite Group'8.2.2.1A2-mTa2X6-wZ-n
AB2O6
Tantalite-(Mn)8.3.2.3Mn2+Ta2O6
Group 9 - NORMAL HALIDES
AX2
Fluorite9.2.1.1CaF2
Group 16a - ANHYDROUS CARBONATES CONTAINING HYDROXYL OR HALOGEN
Bismutite16a.3.5.1(BiO)2CO3
Group 40 - HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
AB2(XO4)2·xH2O, containing (UO2)2+
Meta-autunite40.2a.1.2Ca(UO2)2(PO4)2 · 6-8H2O
Metatorbernite40.2a.13.2Cu(UO2)2(PO4)2 · 8H2O
Group 41 - ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
A5(XO4)3Zq
Fluorapatite41.8.1.1Ca5(PO4)3F
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
Spessartine51.4.3a.3Mn2+3Al2(SiO4)3
Insular SiO4 Groups Only with cations in >[6] coordination
Zircon51.5.2.1Zr(SiO4)
Group 52 - NESOSILICATES Insular SiO4 Groups and O,OH,F,H2O
Insular SiO4 Groups and O, OH, F, and H2O with cations in [4] and >[4] coordination
Sillimanite52.2.2a.1Al2(SiO4)O
Insular SiO4 Groups and O, OH, F, and H2O with cations in [6] coordination only
Topaz ?52.3.1.1Al2(SiO4)(F,OH)2
Group 56 - SOROSILICATES Si2O7 Groups, With Additional O, OH, F and H2O
Si2O7 Groups and O, OH, F, and H2O with cations in [4] coordination
Bertrandite56.1.1.1Be4(Si2O7)(OH)2
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 borate groups
Elbaite61.3.1.8Na(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
Schorl61.3.1.10Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
Group 70 - INOSILICATES Column or Tube Structures
Column or Tube Structures with chains linked by Be
Bavenite70.5.3.1Ca4Be2Al2Si9O26(OH)2
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 2:1 layers
Annite71.2.2b.3KFe2+3(AlSi3O10)(OH)2
Muscovite71.2.2a.1KAl2(AlSi3O10)(OH)2
Phlogopite71.2.2b.1KMg3(AlSi3O10)(OH)2
Sheets of 6-membered rings interlayered 1:1, 2:1, and octahedra
Cookeite71.4.1.2(Al2Li)Al2(AlSi3O10)(OH)8
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)
Group 77 - TECTOSILICATES Zeolites
Zeolite group - True zeolites
Pollucite77.1.1.2(Cs,Na)2(Al2Si4O12) · 2H2O
Unclassified Minerals, Rocks, etc.
Albite
var: Cleavelandite
-Na(AlSi3O8)
Beryl
var: Aquamarine
-Be3Al2Si6O18
var: Goshenite-Be3Al2(Si6O18)
var: Heliodor-Be3Al2(Si6O18)
var: Morganite-Be3Al2(Si6O18)
'Calciomicrolite'-
'Chlorite Group'-
'Columbite-(Fe)-Columbite-(Mn) Series'-
Fluorite
var: Chlorophane
-CaF2
'K Feldspar'-
'var: Adularia'-KAlSi3O8
'Lepidolite'-
'Manganese Oxides'-
'var: Manganese Dendrites'-
Microcline
var: Amazonite
-K(AlSi3O8)
Muscovite
var: Schernikite
-KAl2(AlSi3O10)(OH)2
Opal
var: Opal-AN
-SiO2 · nH2O
Quartz
var: Smoky Quartz
-SiO2
'Rubellite'-A(D3)G6(T6O18)(BO3)3X3Z
'Tourmaline'-A(D3)G6(T6O18)(BO3)3X3Z
Zircon
var: Cyrtolite
-Zr[(SiO4),(OH)4]

List of minerals for each chemical element

HHydrogen
H AnniteKFe32+(AlSi3O10)(OH)2
H BaveniteCa4Be2Al2Si9O26(OH)2
H BertranditeBe4(Si2O7)(OH)2
H Cookeite(Al2Li)Al2(AlSi3O10)(OH)8
H Zircon (var: Cyrtolite)Zr[(SiO4),(OH)4]
H ElbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
H Meta-autuniteCa(UO2)2(PO4)2 · 6-8H2O
H MetatorberniteCu(UO2)2(PO4)2 · 8H2O
H MuscoviteKAl2(AlSi3O10)(OH)2
H OpalSiO2 · nH2O
H Opal (var: Opal-AN)SiO2 · nH2O
H PhlogopiteKMg3(AlSi3O10)(OH)2
H Pollucite(Cs,Na)2(Al2Si4O12) · 2H2O
H Muscovite (var: Schernikite)KAl2(AlSi3O10)(OH)2
H SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
H TopazAl2(SiO4)(F,OH)2
LiLithium
Li Cookeite(Al2Li)Al2(AlSi3O10)(OH)8
Li ElbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
BeBeryllium
Be Beryl (var: Aquamarine)Be3Al2Si6O18
Be BaveniteCa4Be2Al2Si9O26(OH)2
Be BertranditeBe4(Si2O7)(OH)2
Be BerylBe3Al2(Si6O18)
Be Beryl (var: Goshenite)Be3Al2(Si6O18)
Be Beryl (var: Heliodor)Be3Al2(Si6O18)
Be Beryl (var: Morganite)Be3Al2(Si6O18)
BBoron
B ElbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
B RubelliteA(D3)G6(T6O18)(BO3)3X3Z
B SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
B TourmalineA(D3)G6(T6O18)(BO3)3X3Z
CCarbon
C Bismutite(BiO)2CO3
OOxygen
O K Feldspar (var: Adularia)KAlSi3O8
O AlbiteNa(AlSi3O8)
O AlmandineFe32+Al2(SiO4)3
O Microcline (var: Amazonite)K(AlSi3O8)
O AnniteKFe32+(AlSi3O10)(OH)2
O Beryl (var: Aquamarine)Be3Al2Si6O18
O BaveniteCa4Be2Al2Si9O26(OH)2
O BertranditeBe4(Si2O7)(OH)2
O BerylBe3Al2(Si6O18)
O Bismutite(BiO)2CO3
O BismutotantaliteBi(Ta,Nb)O4
O Albite (var: Cleavelandite)Na(AlSi3O8)
O Cookeite(Al2Li)Al2(AlSi3O10)(OH)8
O Zircon (var: Cyrtolite)Zr[(SiO4),(OH)4]
O ElbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
O FluorapatiteCa5(PO4)3F
O Beryl (var: Goshenite)Be3Al2(Si6O18)
O Beryl (var: Heliodor)Be3Al2(Si6O18)
O MaghemiteFe23+O3
O MagnetiteFe2+Fe23+O4
O Meta-autuniteCa(UO2)2(PO4)2 · 6-8H2O
O MetatorberniteCu(UO2)2(PO4)2 · 8H2O
O MicroclineK(AlSi3O8)
O Beryl (var: Morganite)Be3Al2(Si6O18)
O MuscoviteKAl2(AlSi3O10)(OH)2
O OpalSiO2 · nH2O
O Opal (var: Opal-AN)SiO2 · nH2O
O PhlogopiteKMg3(AlSi3O10)(OH)2
O Pollucite(Cs,Na)2(Al2Si4O12) · 2H2O
O QuartzSiO2
O RubelliteA(D3)G6(T6O18)(BO3)3X3Z
O Muscovite (var: Schernikite)KAl2(AlSi3O10)(OH)2
O SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
O SillimaniteAl2(SiO4)O
O Quartz (var: Smoky Quartz)SiO2
O SpessartineMn32+Al2(SiO4)3
O Tantalite-(Mn)Mn2+Ta2O6
O TopazAl2(SiO4)(F,OH)2
O TourmalineA(D3)G6(T6O18)(BO3)3X3Z
O UraniniteUO2
O ZirconZr(SiO4)
FFluorine
F Fluorite (var: Chlorophane)CaF2
F FluorapatiteCa5(PO4)3F
F FluoriteCaF2
F TopazAl2(SiO4)(F,OH)2
NaSodium
Na AlbiteNa(AlSi3O8)
Na Albite (var: Cleavelandite)Na(AlSi3O8)
Na ElbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
Na Pollucite(Cs,Na)2(Al2Si4O12) · 2H2O
Na SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
MgMagnesium
Mg PhlogopiteKMg3(AlSi3O10)(OH)2
AlAluminium
Al K Feldspar (var: Adularia)KAlSi3O8
Al AlbiteNa(AlSi3O8)
Al AlmandineFe32+Al2(SiO4)3
Al Microcline (var: Amazonite)K(AlSi3O8)
Al AnniteKFe32+(AlSi3O10)(OH)2
Al Beryl (var: Aquamarine)Be3Al2Si6O18
Al BaveniteCa4Be2Al2Si9O26(OH)2
Al BerylBe3Al2(Si6O18)
Al Albite (var: Cleavelandite)Na(AlSi3O8)
Al Cookeite(Al2Li)Al2(AlSi3O10)(OH)8
Al ElbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
Al Beryl (var: Goshenite)Be3Al2(Si6O18)
Al Beryl (var: Heliodor)Be3Al2(Si6O18)
Al MicroclineK(AlSi3O8)
Al Beryl (var: Morganite)Be3Al2(Si6O18)
Al MuscoviteKAl2(AlSi3O10)(OH)2
Al PhlogopiteKMg3(AlSi3O10)(OH)2
Al Pollucite(Cs,Na)2(Al2Si4O12) · 2H2O
Al Muscovite (var: Schernikite)KAl2(AlSi3O10)(OH)2
Al SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
Al SillimaniteAl2(SiO4)O
Al SpessartineMn32+Al2(SiO4)3
Al TopazAl2(SiO4)(F,OH)2
SiSilicon
Si K Feldspar (var: Adularia)KAlSi3O8
Si AlbiteNa(AlSi3O8)
Si AlmandineFe32+Al2(SiO4)3
Si Microcline (var: Amazonite)K(AlSi3O8)
Si AnniteKFe32+(AlSi3O10)(OH)2
Si Beryl (var: Aquamarine)Be3Al2Si6O18
Si BaveniteCa4Be2Al2Si9O26(OH)2
Si BertranditeBe4(Si2O7)(OH)2
Si BerylBe3Al2(Si6O18)
Si Albite (var: Cleavelandite)Na(AlSi3O8)
Si Cookeite(Al2Li)Al2(AlSi3O10)(OH)8
Si Zircon (var: Cyrtolite)Zr[(SiO4),(OH)4]
Si ElbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
Si Beryl (var: Goshenite)Be3Al2(Si6O18)
Si Beryl (var: Heliodor)Be3Al2(Si6O18)
Si MicroclineK(AlSi3O8)
Si Beryl (var: Morganite)Be3Al2(Si6O18)
Si MuscoviteKAl2(AlSi3O10)(OH)2
Si OpalSiO2 · nH2O
Si Opal (var: Opal-AN)SiO2 · nH2O
Si PhlogopiteKMg3(AlSi3O10)(OH)2
Si Pollucite(Cs,Na)2(Al2Si4O12) · 2H2O
Si QuartzSiO2
Si Muscovite (var: Schernikite)KAl2(AlSi3O10)(OH)2
Si SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
Si SillimaniteAl2(SiO4)O
Si Quartz (var: Smoky Quartz)SiO2
Si SpessartineMn32+Al2(SiO4)3
Si TopazAl2(SiO4)(F,OH)2
Si ZirconZr(SiO4)
PPhosphorus
P FluorapatiteCa5(PO4)3F
P Meta-autuniteCa(UO2)2(PO4)2 · 6-8H2O
P MetatorberniteCu(UO2)2(PO4)2 · 8H2O
SSulfur
S BismuthiniteBi2S3
KPotassium
K K Feldspar (var: Adularia)KAlSi3O8
K Microcline (var: Amazonite)K(AlSi3O8)
K AnniteKFe32+(AlSi3O10)(OH)2
K MicroclineK(AlSi3O8)
K MuscoviteKAl2(AlSi3O10)(OH)2
K PhlogopiteKMg3(AlSi3O10)(OH)2
K Muscovite (var: Schernikite)KAl2(AlSi3O10)(OH)2
CaCalcium
Ca BaveniteCa4Be2Al2Si9O26(OH)2
Ca Fluorite (var: Chlorophane)CaF2
Ca FluorapatiteCa5(PO4)3F
Ca FluoriteCaF2
Ca Meta-autuniteCa(UO2)2(PO4)2 · 6-8H2O
MnManganese
Mn SpessartineMn32+Al2(SiO4)3
Mn Tantalite-(Mn)Mn2+Ta2O6
FeIron
Fe AlmandineFe32+Al2(SiO4)3
Fe AnniteKFe32+(AlSi3O10)(OH)2
Fe MaghemiteFe23+O3
Fe MagnetiteFe2+Fe23+O4
Fe SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
CuCopper
Cu MetatorberniteCu(UO2)2(PO4)2 · 8H2O
ZrZirconium
Zr Zircon (var: Cyrtolite)Zr[(SiO4),(OH)4]
Zr ZirconZr(SiO4)
CsCaesium
Cs Pollucite(Cs,Na)2(Al2Si4O12) · 2H2O
TaTantalum
Ta BismutotantaliteBi(Ta,Nb)O4
Ta Microlite GroupA2-mTa2X6-wZ-n
Ta Tantalite-(Mn)Mn2+Ta2O6
BiBismuth
Bi BismuthiniteBi2S3
Bi Bismutite(BiO)2CO3
Bi BismutotantaliteBi(Ta,Nb)O4
UUranium
U Meta-autuniteCa(UO2)2(PO4)2 · 6-8H2O
U MetatorberniteCu(UO2)2(PO4)2 · 8H2O
U UraniniteUO2

Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org

Devonian - Silurian
358.9 - 443.8 Ma



ID: 3186140
Paleozoic sedimentary and volcanic rocks

Age: Paleozoic (358.9 - 443.8 Ma)

Lithology: Mudstone-carbonate-sandstone-conglomerate

Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529. [154]

Late Ordovician - Middle Ordovician
443.8 - 470 Ma



ID: 2978277
Collins Hill Formation

Age: Ordovician (443.8 - 470 Ma)

Stratigraphic Name: Collins Hill Formation

Description: ( = Partridge Formation of New Hampshire) - Gray, rusty-weathering, medium- to coarse-grained, poorly layered schist, composed of quartz, oligoclase, muscovite, biotite, and garnet, and commonly staurolite, kyanite, or sillimanite, generally graphitic, interlayered with fine-grained two-mica gneiss, especially to the west, and with calc-silicate and amphibolite layers, also rare quartz-spessartine (coticule) layers.

Comments: Part of Eastern Uplands; Iapetus (Oceanic) Terrane - Bronson Hill Anticlinorium; Brimfield Schist and equivalent formations (includes Collins Hill Formation) (Upper? and Middle Ordovician). Original map source: Connecticut Geological and Natural History Survey, DEP, in cooperation with the U.S. Geological Survey, 2000, Bedrock Geology of Connecticut, shapefile, scale 1:50,000

Lithology: Major:{schist}, Minor:{gneiss}, Incidental:{amphibolite, calc silicate rock}

Reference: Horton, J.D., C.A. San Juan, and D.B. Stoeser. The State Geologic Map Compilation (SGMC) geodatabase of the conterminous United States. doi: 10.3133/ds1052. U.S. Geological Survey Data Series 1052. [133]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Williams, Horace S. (circa 1945): Article for New York Society of Mineralogists. Brainerd Public Library, Haddam, Connecticut.
Stugard, Frederick, Jr. (1958): Pegmatites of the Middletown Area, Connecticut. USGS Bulletin 1042-Q.
Schooner, Richard. (1961): The Mineralogy of Connecticut.
Hewitt, Herb. (circa 1960s): Hewitt Gem Mine advertisement flyer.
Gregory, Gardiner. (1966): Gems and Minerals of Haddam, Connecticut. Gems & Minerals, No. 348., Sept. 1966.
Shelton, William. (1967): Notes on a Find at Haddam. Rocks and Minerals: 42(7): 502-503.
Barton, William R. and Carl E. Goldsmith. (1968): New England Beryllium Investigations. U. S. Bureau of Mines, Report of Investigations 7070.
Taber, Bond. (1971): Turkey Hill Road Quarries. (Private economic assessment prepared for the Hewitts).
Sloan, Edward and Bert Sloan. (1975): Mineral And Gem Trails: New York, New Jersey, Pennsylvania, Connecticut. Distributed by EDSCO.
Seaman, David (1976): "Pegmatite Minerals of the World" in: Januzzi, Ronald E. and David Seaman.(1976): Mineral Localities of Connecticut and Southeastern New York State and Pegmatite Minerals of the World. (The Mineralogical Press: Danbury, Connecticut).
Schooner, Richard (C. 1985): Mineralogy of Central Connecticut (privately published)
Weber, Marcelle H. and Earle C. Sullivan. (1995): Connecticut Mineral Locality Index. Rocks & Minerals (Connecticut Issue): 70(6): 403.
Weissman, Jeffrey G. and Anthony Nikischer. (2005): Photographic Guide to Mineral Species. 2nd edition. CD distributed by Excalibur Mineral Corporation.


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