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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Anthophyllite from
Bare Hills Copper Mine (Smith Avenue Copper Mine), Bare Hills, Baltimore County, Maryland, USA


Locality type:Mine
Classification
Species:Anthophyllite
Formula:◻Mg2Mg5(Si8O22)(OH)2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Anthophyllite data
Locality Data:Click here to view Bare Hills Copper Mine (Smith Avenue Copper Mine), Bare Hills, Baltimore County, Maryland, USA
Data Identifiers
Mindat Occurrence Record ID:150377
Long-form Identifier:1:3:150377:7
GUID (UUID V4):0
Nearest other occurrences of Anthophyllite
1.5km (0.9 miles) ⓘAnthophyllite Location, Bare Hills, Baltimore County, Maryland, USA
9.3km (5.8 miles) ⓘLord Baltimore Drive Quartz occurrence area, Windsor Mill, Baltimore County, Maryland, USA
12.1km (7.5 miles) ⓘPatapsco Glen Construction Site, Woodlawn, Baltimore County, Maryland, USA
12.5km (7.8 miles) ⓘBok Asbestos Mine, Hollofield, Baltimore County, Maryland, USA
43.5km (27.0 miles) ⓘJenkins Mine (Todd Mine), Harford County, Maryland, USA
45.7km (28.4 miles) ⓘHarford Talc and Quartz Company Quarry (Maryland Ceramic & Steatite Company Inc), Dublin, Jarretsville-Dublin Mining District, Harford County, Maryland, USA
58.7km (36.5 miles) ⓘHunting Hill Quarry, Rockville, Montgomery County, Maryland, USA
66.1km (41.1 miles) ⓘDunlap's Quarry, West Nottingham Township, Chester County, Pennsylvania, USA
71.9km (44.7 miles) ⓘWhite Barrens, Elk Township, Chester County, Pennsylvania, USA
94.1km (58.4 miles) ⓘFairfax Quarry, Centreville, Culpeper Basin, Fairfax County, Virginia, USA
References
Rocks & Min.: 21:144-145
Ostrander, Charles W., Price, Jr, Walter E. (1940) Minerals of Maryland. The Natural History Society of Maryland, Baltimore, Maryland, USA. 14pp.p.27
 
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