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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Dolomite from
Frost Quarry, Davis, Howard County, Maryland, USA


Locality type:Quarry
Classification
Species:Dolomite
Formula:CaMg(CO3)2
Confirmation
Validity:Unconfirmed/Questioned
Data
Mineral Data:Click here to view Dolomite data
Locality Data:Click here to view Frost Quarry, Davis, Howard County, Maryland, USA
Data Identifiers
Mindat Occurrence Record ID:202024
Long-form Identifier:1:3:202024:2
GUID (UUID V4):0
Nearest other occurrences of Dolomite
6.8km (4.2 miles) ⓘMarriottsville Quarry, Hernwood, Baltimore County, Maryland, USA
14.1km (8.8 miles) ⓘDelight Quarry (Soldier's Delight Quarry; Dyer Quarry), Soldiers' Delight ridge, Delight, Baltimore County, Maryland, USA
15.2km (9.5 miles) ⓘMineral Hill Mine, Louisville, Carroll County, Maryland, USA
16.2km (10.1 miles) ⓘMcMahon Quarry (Greenspring Quarry), Pikesville, Baltimore County, Maryland, USA
17.2km (10.7 miles) ⓘBrighton Dam Road Quarry (Howard-Montgomery Quarry), Howard County, Maryland, USA
18.9km (11.7 miles) ⓘBare Hills Serpentine Quarry East, Bare Hills, Baltimore County, Maryland, USA
20.1km (12.5 miles) ⓘCostley Gold Mine, Carroll County, Maryland, USA
24.5km (15.2 miles) ⓘMartin Marietta Texas Quarry, Cockeysville, Baltimore County, Maryland, USA
25.1km (15.6 miles) ⓘBeaver Dam Quarry (Baker and Connelly Quarry), Cockeysville, Baltimore County, Maryland, USA
34.6km (21.5 miles) ⓘUnionville Mine, Frederick County, Maryland, USA
References
reported by Ostrander and Price(1940) but not seen in in dumps by Bernstein (1980)
 
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