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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Calcite from
Ellicott City, Howard County, Maryland, USA


Locality type:Census-designated Place
Classification
Species:Calcite
Formula:CaCO3
Comments:with pyrite, galena, chalcopyrite in a calcite lens calcite, in a chlorite schist labelled as coming from Ellicott City is in the Smithsonian Collections
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Biotite2
Data
Mineral Data:Click here to view Calcite data
Locality Data:Click here to view Ellicott City, Howard County, Maryland, USA
Data Identifiers
Mindat Occurrence Record ID:202153
Long-form Identifier:1:3:202153:9
GUID (UUID V4):0
Nearest other occurrences of Calcite
4.7km (2.9 miles) ⓘSouthern Pit, Hollofield Gabbro Quarries, Hollofield, Baltimore County, Maryland, USA
5.4km (3.4 miles) ⓘPatapsco Glen Construction Site, Woodlawn, Baltimore County, Maryland, USA
9.3km (5.8 miles) ⓘWoodstock, Howard County, Maryland, USA
13.3km (8.3 miles) ⓘMarriottsville Quarry, Hernwood, Baltimore County, Maryland, USA
14.6km (9.1 miles) ⓘSavage Gabbro Quarry, Savage, Howard County, Maryland, USA
15.0km (9.3 miles) ⓘWoodberry Quarry, Woodberry, Baltimore City, Maryland, USA
15.8km (9.8 miles) ⓘMcMahon Quarry (Greenspring Quarry), Pikesville, Baltimore County, Maryland, USA
15.8km (9.8 miles) ⓘJones Falls Quarries, Baltimore City, Maryland, USA
16.8km (10.4 miles) ⓘBare Hills Copper Mine (Smith Avenue Copper Mine), Bare Hills, Baltimore County, Maryland, USA
17.2km (10.7 miles) ⓘWeir Mine, Holbrook, Baltimore County, Maryland, USA
References
Bernstein, Lawrence R. (1980) Minerals of the Washington, D.C. Area - Issue 5 of Educational series, Maryland Geological Survey. Department of Natural Resources, Maryland Geological Survey. p.1-148.
 
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