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Schoonmaker Mine (Cramer Mine), Strickland pegmatite (Strickland-Cramer Quarry; Strickland-Cramer Mine; Strickland-Cramer Feldspar-Mica Quarries), Collins Hill, Portland, Middlesex Co., Connecticut, USA
Detailed Mineral List:
| Actinolite | ||
| Formula: | ☐{Ca2}{(Mg,Fe2+)5}(Si8O22)(OH)2 | |
| Reference: | Rocks & Minerals (1955) 30:351-358 | |
| Albite | ||
| Formula: | NaAlSi3O8 | |
| Reference: | Rocks & Min.: 12: 141-143.; Rocks & Minerals (1955) 30:351-358 | |
| Albite var: Cleavelandite | ||
| Habit: | tabular, platy | |
| Colour: | white to pale blue | |
| Reference: | Rocks & Min.: 12: 141-143.; USGS Prof Paper 255 | |
| Almandine | ||
| Formula: | Fe2+3Al2(SiO4)3 | |
| Reference: | Rocks & Min.: 12: 141-143.; Seaman, David W. (1947): Reminiscing On Collins Hill, Portland, Conn. Rocks & Minerals, vol. 22, no. 8, pp. 732-3. | |
| Annite | ||
| Formula: | KFe2+3(AlSi3O10)(OH)2 | |
| Reference: | Rocks & Min.: 12: 141-143. | |
| Aragonite | ||
| Formula: | CaCO3 | |
| Reference: | Rocks & Min.: 12: 141-143. | |
| Bertrandite | ||
| Formula: | Be4(Si2O7)(OH)2 | |
| Description: | In cavities in feldspar. | |
| Reference: | Bartsch, Rudolf C. B. (1940): New England Notes. Rocks & Minerals, vol. 15, no. 6, p. 202. | |
| Beryl var: Aquamarine | ||
| Formula: | Be3Al2Si6O18 | |
| Reference: | Rocks & Min.: 12: 141-143. | |
| Beryl var: Heliodor |  | |
| Colour: | yellow | |
| Reference: | Harold Moritz collection; Seaman, David W. (1947): Reminiscing On Collins Hill, Portland, Conn. Rocks & Minerals, vol. 22, no. 8, pp. 732-3. | |
| Photo: © 2010 Harold Moritz. Heliodor from Schoonmaker Mine, Strickland pegmatite, Collins Hill, Portland, Middlesex Co., Connecticut, USA | ||
| Beryl var: Morganite | ||
| Colour: | pink | |
| Description: | Many fine pieces. | |
| Reference: | Bartsch, Rudolf C. B. (1940): New England Notes. Rocks & Minerals, vol. 15, no. 6, p. 202. | |
| Calcite | ||
| Formula: | CaCO3 | |
| Reference: | Rocks & Minerals (1955) 30:351-358 | |
| Cordierite | ||
| Formula: | (Mg,Fe)2Al3(AlSi5O18) | |
| Reference: | Am Min 35:173-184 | |
| Diopside | ||
| Formula: | CaMgSi2O6 | |
| Reference: | Rocks & Minerals (1955) 30:351-358 | |
| Elbaite |  | |
| Formula: | Na(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH) | |
| Colour: | green, pink, yellow, purple, blue | |
| Description: | Some of the crystals had a deep pink center and were colorless on the outside, and some were pink at one end and green on the other. Some occurred in an unusual form, as pellets of a quarter inch or more in diameter. Some opaque tourmaline was found in triangular crystals of about 1/2 x 3”, which were a yellowish green on the outside and greyish white inside. (Little, 1942). Tourmalines in five colors were easily collected ranging from green through yellow to purple, blue, and black either from one end of a crystal to the other end or perhaps in a series of different colored crystals in parallel position with each other...A small one-half inch long bicolored pink and green tourmaline crystal with pink interior and outer edge green, like a watermelon, was picked up from the dump of the Schoonmaker mine. (Seaman, 1947) | |
| Reference: | Harold Moritz collection; Little (1942); Seaman, David W. (1947): Reminiscing On Collins Hill, Portland, Conn. Rocks & Minerals, vol. 22, no. 8, pp. 732-3. | |
| Photo: © 2010 Harold Moritz. Elbaite from Schoonmaker Mine, Strickland pegmatite, Collins Hill, Portland, Middlesex Co., Connecticut, USA | ||
| Fluorapatite |  | |
| Formula: | Ca5(PO4)3F | |
| Description: | "small perfectly terminated manganapatite crystal" (Seaman, 1947) | |
| Reference: | Harold Moritz collection; Seaman, David W. (1947): Reminiscing On Collins Hill, Portland, Conn. Rocks & Minerals, vol. 22, no. 8, pp. 732-3. | |
| Photo: © 2010 Harold Moritz. Fluorapatite from Schoonmaker Mine, Strickland pegmatite, Collins Hill, Portland, Middlesex Co., Connecticut, USA | ||
| Fluorite | ||
| Formula: | CaF2 | |
| Colour: | purple | |
| Description: | found in two forms; as dark purple cleavage pieces, and as nodules that were covered with a grey film, but that fluoresced a beautiful lavender blue. The cleavage pieces were not fluorescent. With pyrite. | |
| Reference: | Rocks & Min.: 12: 141-143.; Rocks & Minerals (1955) 30:351-358; Little (1942) | |
| Grossular | ||
| Formula: | Ca3Al2(SiO4)3 | |
| Reference: | Rocks & Minerals (1955) 30:351-358 | |
| 'Gummite' | ||
| Colour: | reddish-orange | |
| Description: | Associated with crystallized uraninite. | |
| Reference: | Schooner, Richard. (1947): Collins Hill (Portland, Conn.) Deserted. Rocks & Minerals, vol. 22, no. 2, p. 135. | |
| Lepidolite |  | |
| Colour: | purple | |
| Reference: | Rocks & Min.: 12: 141-143.; Bartsch, Rudolf C. B. (1940): New England Notes. Rocks & Minerals, vol. 15, no. 6, p. 202. | |
| Photo: © 2010 Harold Moritz. Lepidolite from Schoonmaker Mine, Strickland pegmatite, Collins Hill, Portland, Middlesex Co., Connecticut, USA | ||
| Lithiophilite | ||
| Formula: | LiMn2+PO4 | |
| Colour: | deep orange-red to reddish brown to light brown | |
| Description: | with some spodumene and lepidolite; some very fine specimens of deep orange-red color in quartz | |
| Reference: | Little, L. W. (1942): Recent Finds of Minerals in Central Connecticut. Rocks and Minerals. vol. 17, pp 280-2.; Bartsch, Rudolf C. B. (1940): New England Notes. Rocks & Minerals, vol. 15, no. 6, p. 202. | |
| Microcline | ||
| Formula: | KAlSi3O8 | |
| Reference: | Rocks & Min.: 12: 141-143. | |
| Montebrasite | ||
| Formula: | LiAl(PO4)(OH) | |
| Habit: | typically anhedral | |
| Colour: | white or pinkish, with brown rind | |
| Description: | called amblygonite, but shown by others to be montebrasite | |
| Reference: | Little, L. W. (1942): Recent Finds of Minerals in Central Connecticut. Rocks and Minerals, vol. 17, pp. 280-2.; Bartsch, Rudolf C. B. (1940): New England Notes. Rocks & Minerals, vol. 15, no. 6, p. 202. | |
| Muscovite | ||
| Formula: | KAl2(AlSi3O10)(OH)2 | |
| Reference: | Rocks & Min.: 12: 141-143.; USGS Prof Paper 255 | |
| Pickeringite | ||
| Formula: | MgAl2(SO4)4 · 22H2O | |
| Reference: | Rocks & Minerals (1955) 30:351-358 | |
| 'Pinite' | ||
| Colour: | yellow, green, gray, lavendar, brown | |
| Description: | Alteration of spodumene. | |
| Reference: | Am Min 35:173-184; Bartsch, Rudolf C. B. (1940): New England Notes. Rocks & Minerals, vol. 15, no. 6, p. 202. | |
| Pyrite | ||
| Formula: | FeS2 | |
| Habit: | cubic | |
| Colour: | brassy yellow | |
| Description: | bright cubes of pyrite which varied in size up to 1/2 inch on the faces | |
| Reference: | Rocks & Min.: 12: 141-143.; Rocks & Minerals (1955) 30:351-358; Little (1942) | |
| Quartz | ||
| Formula: | SiO2 | |
| Reference: | Rocks & Minerals (1955) 30:351-358; USGS Prof Paper 255 | |
| Quartz var: Rock Crystal | ||
| Reference: | Rocks & Min.: 12: 141-143. | |
| Quartz var: Smoky Quartz | ||
| Formula: | SiO2 | |
| Reference: | Rocks & Min.: 12: 141-143. | |
| Rhodochrosite | ||
| Formula: | MnCO3 | |
| Reference: | Bartsch, Rudolf C. B. (1940): New England Notes. Rocks & Minerals, vol. 15, no. 6, p. 202. | |
| 'Scapolite' ? | ||
| Reference: | Rocks & Minerals (1955) 30:351-358 | |
| Schorl |  | |
| Formula: | Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH) | |
| Colour: | black | |
| Reference: | Rocks & Min.: 12: 141-143.; Seaman, David W. (1947): Reminiscing On Collins Hill, Portland, Conn. Rocks & Minerals, vol. 22, no. 8, pp. 732-3. | |
| Photo: © 2010 Harold Moritz. Schorl from Schoonmaker Mine, Strickland pegmatite, Collins Hill, Portland, Middlesex Co., Connecticut, USA | ||
| Sphalerite | ||
| Formula: | ZnS | |
| Colour: | black | |
| Reference: | Bartsch, Rudolf C. B. (1940): New England Notes. Rocks & Minerals, vol. 15, no. 6, p. 202. | |
| Spodumene |  | |
| Formula: | LiAlSi2O6 | |
| Habit: | elongated, flat crystals with dome termination | |
| Colour: | tan to lavendar | |
| Description: | Much material etched to look like wood or altered to pinite. | |
| Reference: | Harold Moritz collection.; Seaman, David W. (1947): Reminiscing On Collins Hill, Portland, Conn. Rocks & Minerals, vol. 22, no. 8, pp. 732-3. | |
| Photo: © 2010 Harold Moritz. Spodumene from Schoonmaker Mine, Strickland pegmatite, Collins Hill, Portland, Middlesex Co., Connecticut, USA | ||
| 'Tourmaline var: Rubellite' |  | |
| Reference: | Rocks & Min.: 12: 141-143. | |
| Photo: Rubellite from Schoonmaker Mine, Strickland pegmatite, Collins Hill, Portland, Middlesex Co., Connecticut, USA | ||
| 'Tourmaline var: Verdelite' | ||
| Reference: | Rocks & Min.: 12: 141-143. | |
| Uraninite | ||
| Formula: | UO2 | |
| Reference: | Schooner, Richard. (1947): Collins Hill (Portland, Conn.) Deserted. Rocks & Minerals, vol. 22, no. 2, p. 135. | |
| Xenotime-(Y) | ||
| Formula: | Y(PO4) | |
| Reference: | Rocks & Minerals (1955) 30:351-358 | |
| Zoisite | ||
| Formula: | {Ca2}{Al3}(Si2O7)(SiO4)O(OH) | |
| Reference: | Rocks & Minerals (1955) 30:351-358 | |
39 entries listed. 28 valid minerals.
References
Zodac, Peter. (1937): Minerals of the Strickland Quarry (Rocks & Minerals: 12:131-141.)
Bartsch, Rudolf C. B. (1940): New England Notes. Rocks & Minerals, vol. 15, no. 6, p. 202.
Little, L. W. (1942): Recent Finds of Minerals in Central Connecticut. Rocks & Minerals. Vol. 17, No. 8., pp. 280-2.
Schooner, Richard. (1947): Collins Hill (Portland, Conn.) Deserted. Rocks & Minerals, vol. 22, no. 2, p. 135.
Seaman, David W. (1947): Reminiscing On Collins Hill, Portland, Conn. Rocks & Minerals, vol. 22, no. 8, pp. 732-3.
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.
Stugard, Frederick, Jr. (1958): Pegmatites of the Middletown Area, Connecticut. USGS Bulletin 1042-Q.
Jones, Robert W. (1960): Luminescent Minerals of Connecticut, a Guide to Their Properties and Locations.
Schooner, Richard. (1961): The Mineralogy of Connecticut. Fluorescent House, Branford, Connecticut.
Albini, Anthony J. (1979): Selected Pegmatite Quarries Of The Central Connecticut Region. Masters thesis. Central Connecticut State College, New Britain, Connecticut.
Webster, Bud and Bill Shelton. (1979): Mineral Collector’s Field Guide the Northeast.
Weber, Marcelle H. and Earle C. Sullivan. (1995): Connecticut Mineral Locality Index. Rocks & Minerals (Connecticut Issue), Vol. 70, No. 6, p. 403.
Bartsch, Rudolf C. B. (1940): New England Notes. Rocks & Minerals, vol. 15, no. 6, p. 202.
Little, L. W. (1942): Recent Finds of Minerals in Central Connecticut. Rocks & Minerals. Vol. 17, No. 8., pp. 280-2.
Schooner, Richard. (1947): Collins Hill (Portland, Conn.) Deserted. Rocks & Minerals, vol. 22, no. 2, p. 135.
Seaman, David W. (1947): Reminiscing On Collins Hill, Portland, Conn. Rocks & Minerals, vol. 22, no. 8, pp. 732-3.
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.
Stugard, Frederick, Jr. (1958): Pegmatites of the Middletown Area, Connecticut. USGS Bulletin 1042-Q.
Jones, Robert W. (1960): Luminescent Minerals of Connecticut, a Guide to Their Properties and Locations.
Schooner, Richard. (1961): The Mineralogy of Connecticut. Fluorescent House, Branford, Connecticut.
Albini, Anthony J. (1979): Selected Pegmatite Quarries Of The Central Connecticut Region. Masters thesis. Central Connecticut State College, New Britain, Connecticut.
Webster, Bud and Bill Shelton. (1979): Mineral Collector’s Field Guide the Northeast.
Weber, Marcelle H. and Earle C. Sullivan. (1995): Connecticut Mineral Locality Index. Rocks & Minerals (Connecticut Issue), Vol. 70, No. 6, p. 403.
External Links
Cameron, et al (1954): http://pubs.er.usgs.gov/publication/pp255
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