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Schorl from
Great Hill Pond Brook pegmatite, Cobalt, East Hampton (Chatham), Middlesex Co., Connecticut, USA

Locality type:Pegmatite
Classification
Species:Schorl
Formula:Na(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
Comments:The quarry below the waterfall at the lower end of Great Hill Lake in Portland, downstream from the dam, was a source of excellent large crystals, with sharp faces (Schooner, 1961).
Habit:prismatic with rhombohedral terminations
Colour:black
Quality for species:Good crystals or rich for species - important (!)
Abundance at site:Common
Confirmation
Validity:Believed Valid
References
References: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.; Rice, William North and Wilbur Garland Foye. (1927), Guide to the Geology of Middletown, Connecticut, and Vicinity. State Geological and Natural History Survey Bulletin 41.
Data
Mineral Data:Click here to view Schorl data
Locality Data:Click here to view Great Hill Pond Brook pegmatite, Cobalt, East Hampton (Chatham), Middlesex Co., Connecticut, USA
Nearest other occurrences of Schorl
0.7km (0.4 miles) State Forest Quarry #2 (State Forest No. 2 Mica Mine), Cobalt, East Hampton (Chatham), Middlesex Co., Connecticut, USA
2.9km (1.8 miles) Hale-Walker prospects, Collins Hill, Portland, Middlesex Co., Connecticut, USA
3.0km (1.9 miles) Nathan Hall Quarry (Clark Hill Quarry), East Hampton (Chatham), Middlesex Co., Connecticut, USA
3.1km (1.9 miles) State Forest Quarry No. 1 (State Forest #1 Quarry; Clark Hill Quarry), East Hampton (Chatham), Middlesex Co., Connecticut, USA
3.3km (2.0 miles) Unnamed stone quarries, Hog Hill, East Hampton (Chatham), Middlesex Co., Connecticut, USA
3.4km (2.1 miles) Markham mica Quarry, Hog Hill, East Hampton (Chatham), Middlesex Co., Connecticut, USA
3.5km (2.2 miles) Unnamed building stone quarry, Collins Hill, Portland, Middlesex Co., Connecticut, USA
3.6km (2.2 miles) Strickland Quarry (Eureka Quarry), Strickland pegmatite (Strickland-Cramer Quarry; Strickland-Cramer Mine; Strickland-Cramer Feldspar-Mica Quarries), Collins Hill, Portland, Middlesex Co., Connecticut, USA
3.7km (2.3 miles) Schoonmaker Mine (Cramer Mine), Strickland pegmatite (Strickland-Cramer Quarry; Strickland-Cramer Mine; Strickland-Cramer Feldspar-Mica Quarries), Collins Hill, Portland, Middlesex Co., Connecticut, USA
3.7km (2.3 miles) Pelton's Quarry, Portland, Middlesex Co., Connecticut, USA
 
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