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
State Route 9 rock cuts, Haddam, Middlesex County, Connecticut, USA


Classification
Species:Phlogopite
Formula:KMg3(AlSi3O10)(OH)2
Comments:In the calcite marble.
Habit:anhedral flakes
Colour:brown
Quality for species:Rock forming mineral/non-crystalline/little interest for collectors.(##)
Confirmation
Validity:Confirmed
Confirmation Methods:Visually Identified
Data
Mineral Data:Click here to view Phlogopite data
Locality Data:Click here to view State Route 9 rock cuts, Haddam, Middlesex County, Connecticut, USA
Data Identifiers
Mindat Occurrence Record ID:920674
Long-form Identifier:1:3:920674:8
GUID (UUID V4):0
Nearest other occurrences of Phlogopite
1.1km (0.7 miles) ⓘHewitt Gem Quarry (Herb's Gem Quarry; Sawmill Quarry), Haddam, Middlesex County, Connecticut, USA
5.2km (3.3 miles) ⓘGillette Quarry (J-J Mine; Haddam Neck Quarry), Haddam Neck, Haddam, Middlesex County, Connecticut, USA
17.3km (10.7 miles) ⓘStrickland Quarry, Strickland pegmatite, Collins Hill, Portland, Middlesex County, Connecticut, USA
51.3km (31.9 miles) ⓘWaterbury Road quarry, Thomaston, Litchfield County, Connecticut, USA
53.4km (33.2 miles) ⓘThomaston Dam railroad cut, Thomaston Dam, Thomaston, Litchfield County, Connecticut, USA
61.2km (38.0 miles) ⓘCorporate Drive, Long Hill, Trumbull, Fairfield County, Connecticut, USA
61.5km (38.2 miles) ⓘOld Mine Park (Old Tungsten Mine), Long Hill, Trumbull, Fairfield County, Connecticut, USA
61.7km (38.3 miles) ⓘOld Mine Plaza construction site, Long Hill, Trumbull, Fairfield County, Connecticut, USA
72.9km (45.3 miles) ⓘU. S. Route 7 Expressway (Danbury line to Iron Works District), Brookfield, Fairfield County, Connecticut, USA
74.3km (46.2 miles) ⓘAgstone Company Limestone Quarry, Danbury, Fairfield County, Connecticut, USA
References
Schooner, Richard. (circa 1985), Untitled manuscript on central Connecticut mineralogy.
 
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