Vote for your favorite mineral in #MinCup26! - Sphalerite vs. Anorthite
Both zinc ore Sphalerite and calcium plagioclase feldspar Anorthite have perfect cleavage that will split cleanly if you hit them with a hammer, but only one can claim a larger split of your votes!
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Phlogopite from
Strickland Quarry, Strickland pegmatite, Collins Hill, Portland, Middlesex County, Connecticut, USA


Locality type:Quarry
Classification
Species:Phlogopite
Formula:KMg3(AlSi3O10)(OH)2
Comments:Schooner (1958) speculates that the brown mica in the calc-silicate units in the host Collins Hill Formation is dravite. In Schooner (circa 1985) he writes that "blocks of intergrown dravite and phlogopite have been collected; they came from the pegmatite near its contact with schist". In both cases, analytical data are lacking.
Habit:micaceous
Colour:dark brown
Quality for species:Poor for species, only of interest for locality collectors. (#)
Abundance at site:Rare
Confirmation
Validity:Unconfirmed/Questioned
Data
Mineral Data:Click here to view Phlogopite data
Locality Data:Click here to view Strickland Quarry, Strickland pegmatite, Collins Hill, Portland, Middlesex County, Connecticut, USA
Data Identifiers
Mindat Occurrence Record ID:96226
Long-form Identifier:1:3:96226:9
GUID (UUID V4):0
Nearest other occurrences of Phlogopite
13.0km (8.1 miles) ⓘGillette Quarry (J-J Mine; Haddam Neck Quarry), Haddam Neck, Haddam, Middlesex County, Connecticut, USA
16.9km (10.5 miles) ⓘHewitt Gem Quarry (Herb's Gem Quarry; Sawmill Quarry), Haddam, Middlesex County, Connecticut, USA
17.3km (10.7 miles) ⓘState Route 9 rock cuts, Haddam, Middlesex County, Connecticut, USA
40.8km (25.3 miles) ⓘWaterbury Road quarry, Thomaston, Litchfield County, Connecticut, USA
41.3km (25.6 miles) ⓘThomaston Dam railroad cut, Thomaston Dam, Thomaston, Litchfield County, Connecticut, USA
59.0km (36.6 miles) ⓘColebrook Dam and Colebrook River Lake, Colebrook, Litchfield County, Connecticut, USA
62.3km (38.7 miles) ⓘCorporate Drive, Long Hill, Trumbull, Fairfield County, Connecticut, USA
62.8km (39.0 miles) ⓘOld Mine Park (Old Tungsten Mine), Long Hill, Trumbull, Fairfield County, Connecticut, USA
62.9km (39.1 miles) ⓘOld Mine Plaza construction site, Long Hill, Trumbull, Fairfield County, Connecticut, USA
68.7km (42.7 miles) ⓘU. S. Route 7 Expressway (Danbury line to Iron Works District), Brookfield, Fairfield County, Connecticut, USA
References
Ralph Lieser of Pappy’s Beryl Shop, East Hampton
and Howard Pate of Fluorescent House, Branford, Connecticut.
Schooner, Richard. (circa 1985), Untitled manuscript on central Connecticut mineralogy.
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
 
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