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


06476520017272734887668.jpg
Calcite

Hunting Hill Quarry, Rockville, Montgomery County, Maryland, USA
03700670017272021681131.jpg
Calcite, etc.

Hunting Hill Quarry, Rockville, Montgomery County, Maryland, USA
06094500017272021692868.jpg
Calcite, etc.

Hunting Hill Quarry, Rockville, Montgomery County, Maryland, USA
04575430017272021713215.jpg
Calcite, etc.

Hunting Hill Quarry, Rockville, Montgomery County, Maryland, USA
06476520017272734887668.jpg
Calcite

Hunting Hill Quarry, Rockville, Montgomery County, Maryland, USA
04782640017363876396034.jpg
Calcite, etc.

Hunting Hill Quarry, Rockville, Montgomery County, Maryland, USA
02130360017363876409535.jpg
Calcite, etc.

Hunting Hill Quarry, Rockville, Montgomery County, Maryland, USA
01274080017363876417832.jpg
Calcite, etc.

Hunting Hill Quarry, Rockville, Montgomery County, Maryland, USA
06476520017272734887668.jpg
Calcite

Hunting Hill Quarry, Rockville, Montgomery County, Maryland, USA
03700670017272021681131.jpg
Calcite, etc.

Hunting Hill Quarry, Rockville, Montgomery County, Maryland, USA
06094500017272021692868.jpg
Calcite, etc.

Hunting Hill Quarry, Rockville, Montgomery County, Maryland, USA
04575430017272021713215.jpg
Calcite, etc.

Hunting Hill Quarry, Rockville, Montgomery County, Maryland, USA
Locality type:Quarry
Classification
Species:Calcite
Formula:CaCO3
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Clinozoisite8
Nacrite6
Grossular5
Talc5
Diopside5
Prehnite4
Coalingite3
Pokrovskite3
Mcguinnessite3
Magnetite2
Clinochlore2
Pyroaurite2
Manganese Oxides2
Magnesite2
Muscovite1
Chromite-Magnesiochromite Series1
Serpentine Subgroup1
Laumontite1
Stellerite1
Data
Mineral Data:Click here to view Calcite data
Locality Data:Click here to view Hunting Hill Quarry, Rockville, Montgomery County, Maryland, USA
Photo GalleryView Gallery (12 photos)
Data Identifiers
Mindat Occurrence Record ID:46592
Long-form Identifier:1:3:46592:4
GUID (UUID V4):0
Nearest other occurrences of Calcite
11.4km (7.1 miles) ⓘDifficult Run, Fairfax County, Virginia, USA
20.7km (12.8 miles) ⓘLoudoun Quarries Inc. Quarry, Herndon, Loudoun County, Virginia, USA
23.7km (14.7 miles) ⓘDickerson Trap Rock Quarries, Dickerson, Montgomery County, Maryland, USA
24.2km (15.0 miles) ⓘGoose Creek Mine (Eagle Mine), Culpeper Basin, Loudoun County, Virginia, USA
24.5km (15.2 miles) ⓘBrighton Dam Road Quarry (Howard-Montgomery Quarry), Howard County, Maryland, USA
24.8km (15.4 miles) ⓘLeesburg Quarry, Leesburg, Loudoun County, Virginia, USA
25.0km (15.6 miles) ⓘOld Goose Creek Quarry, Leesburg, Loudoun County, Virginia, USA
25.0km (15.6 miles) ⓘNew Goose Creek Quarry, Leesburg, Loudoun County, Virginia, USA
29.0km (18.0 miles) ⓘVirginia Crushed Stone Quarry, Loudoun County, Virginia, USA
29.1km (18.1 miles) ⓘWhite Quarry, Leesburg, Loudoun County, Virginia, 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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