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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Ankerite from
Huddlestone Mine, Rockville, Montgomery County, Maryland, USA


Locality type:Mine
Classification
Species:Ankerite
Formula:Ca(Fe2+,Mg)(CO3)2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Ankerite data
Locality Data:Click here to view Huddlestone Mine, Rockville, Montgomery County, Maryland, USA
Data Identifiers
Mindat Occurrence Record ID:68752
Long-form Identifier:1:3:68752:6
GUID (UUID V4):0
Nearest other occurrences of Ankerite
9.0km (5.6 miles) ⓘMaryland Mine (Allen shaft), Potomac, Montgomery County, Maryland, USA
54.3km (33.7 miles) ⓘJones Falls Quarries, Baltimore City, Maryland, USA
74.6km (46.4 miles) ⓘFranklin Mine (Deep Run Mine), Midland, Gold-Pyrite Belt, Fauquier County, Virginia, USA
86.4km (53.7 miles) ⓘUnited States Mines (Welford Mine), Rappahannock River, Gold-Pyrite Belt, Spotsylvania County, Virginia, USA
90.7km (56.4 miles) ⓘMelville Mine (Rapidan Mine), Gold-Pyrite Belt, Orange County, Virginia, USA
91.5km (56.9 miles) ⓘVaucluse Mine (Grymes Mine; Grimes Mine), Gold-Pyrite Belt, Orange County, Virginia, USA
94.7km (58.8 miles) ⓘLuckstone quarry (Culpeper Stone Company Inc. quarry), Stevensburg, Culpeper County, Virginia, USA
98.4km (61.1 miles) ⓘDinning Rutile prospect, Clermont Mills, Harford County, Maryland, USA
99.2km (61.6 miles) ⓘWaterlick, Warren County, Virginia, USA
References
Rocks & Min.:11:8 & 121
14:305.
AM. MINERALOGIST, V. 18, 312-313.
 
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