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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Aragonite from
Hunting Hill Quarry, Rockville, Montgomery County, Maryland, USA


04715370017797611922830.jpg
Aragonite, etc.

Hunting Hill Quarry, Rockville, Montgomery County, Maryland, USA
05734680017797611925645.jpg
Aragonite, etc.

Hunting Hill Quarry, Rockville, Montgomery County, Maryland, USA
04715370017797611922830.jpg
Aragonite, etc.

Hunting Hill Quarry, Rockville, Montgomery County, Maryland, USA
05623240017272021607932.jpg
Aragonite, etc.

Hunting Hill Quarry, Rockville, Montgomery County, Maryland, USA
05115410017272734363517.jpg
Aragonite, etc.

Hunting Hill Quarry, Rockville, Montgomery County, Maryland, USA
07368400017272021615608.jpg
Aragonite, etc.

Hunting Hill Quarry, Rockville, Montgomery County, Maryland, USA
Locality type:Quarry
Classification
Species:Aragonite
Formula:CaCO3
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Mcguinnessite2
Deweylite1
Hydromagnesite1
Data
Mineral Data:Click here to view Aragonite data
Locality Data:Click here to view Hunting Hill Quarry, Rockville, Montgomery County, Maryland, USA
Photo GalleryView Gallery (2 photos)
Data Identifiers
Mindat Occurrence Record ID:46587
Long-form Identifier:1:3:46587:2
GUID (UUID V4):0
Nearest other occurrences of Aragonite
43.1km (26.8 miles) ⓘVulcan Materials Company Crushed Stone Quarry (Manassas Quarry), Manassas, Prince William County, Virginia, USA
45.4km (28.2 miles) ⓘSouthern Pit, Hollofield Gabbro Quarries, Hollofield, Baltimore County, Maryland, USA
50.2km (31.2 miles) ⓘChoate Mine, Owings Mills, Baltimore County, Maryland, USA
58.7km (36.5 miles) ⓘBare Hills Copper Mine (Smith Avenue Copper Mine), Bare Hills, Baltimore County, Maryland, USA
78.0km (48.5 miles) ⓘBlue Mount Quarry, Blue Mount, Baltimore County, Maryland, USA
80.0km (49.7 miles) ⓘCulp Ridge, Glatfelter Farm, Hamiltonban Township, Adams County, Pennsylvania, 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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