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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Quartz from
Kensington Mica Mine (Gilmore Mine; B. H. Warner Mine), Wheaton, Montgomery County, Maryland, USA


Locality type:Mine
Classification
Species:Quartz
Formula:SiO2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Quartz data
Locality Data:Click here to view Kensington Mica Mine (Gilmore Mine; B. H. Warner Mine), Wheaton, Montgomery County, Maryland, USA
Data Identifiers
Mindat Occurrence Record ID:85531
Long-form Identifier:1:3:85531:2
GUID (UUID V4):0
Nearest other occurrences of Quartz
1.1km (0.7 miles) ⓘLamberton Branch locality, Silver Spring, Montgomery County, Maryland, USA
3.0km (1.8 miles) ⓘWhite Oak, Montgomery County, Maryland, USA
3.0km (1.9 miles) ⓘPaint Branch, White Oak, Montgomery County, Maryland, USA
5.8km (3.6 miles) ⓘAspen Hill, Montgomery County, Maryland, USA
8.3km (5.2 miles) ⓘHalpine Crushed-schist Quarry, Aspen Hill, Montgomery County, Maryland, USA
8.4km (5.2 miles) ⓘRock Creek, Montgomery County, Maryland, USA
10.8km (6.7 miles) ⓘPrince Georges Mall, Prince Georges County, Maryland, USA
10.9km (6.8 miles) ⓘAyrlawn Park, Bethesda, Montgomery County, Maryland, USA
11.3km (7.0 miles) ⓘMuirkirk Pit (Maryland Clay Products), Prince Georges County, Maryland, USA
11.3km (7.0 miles) ⓘHuddlestone Mine, Rockville, Montgomery County, Maryland, USA
References
Rocks & Min.: 11: 8-9.
American Mineralogist (1926) 11:35-38
 
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