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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Muscovite from
Ben Murphy Mica Mine, Scaggsville, Howard County, Maryland, USA


Locality type:Mine
Classification
Species:Muscovite
Formula:KAl2(AlSi3O10)(OH)2
Comments:Often with inclusions of gahnite, quartz, columbite-tantalite, spessartine, and iron oxides (limonite).
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Muscovite data
Locality Data:Click here to view Ben Murphy Mica Mine, Scaggsville, Howard County, Maryland, USA
Data Identifiers
Mindat Occurrence Record ID:202000
Long-form Identifier:1:3:202000:6
GUID (UUID V4):0
Nearest other occurrences of Muscovite
0.6km (0.3 miles) ⓘGeorge Iager Beryl-Mica Prospects, Scaggsville, Howard County, Maryland, USA
1.4km (0.8 miles) ⓘEarth Products Company Mines, Montgomery County, Maryland, USA
4.2km (2.6 miles) ⓘParlet Prospect, Simpsonville, Howard County, Maryland, USA
8.9km (5.6 miles) ⓘBrighton Dam Road Quarry (Howard-Montgomery Quarry), Howard County, Maryland, USA
10.8km (6.7 miles) ⓘPaint Branch, White Oak, Montgomery County, Maryland, USA
11.1km (6.9 miles) ⓘWhite Oak, Montgomery County, Maryland, USA
12.1km (7.5 miles) ⓘKensington Mica Mine (Gilmore Mine; B. H. Warner Mine), Wheaton, Montgomery County, Maryland, USA
12.7km (7.9 miles) ⓘLamberton Branch locality, Silver Spring, Montgomery County, Maryland, USA
17.7km (11.0 miles) ⓘWeber's Quarry, Ellicott City, Howard County, Maryland, USA
18.0km (11.2 miles) ⓘPindell Quarries No. 1, Howard County, Maryland, USA
References
Mines of the Washington D.C Area
 
and/or  
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