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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Iron-bearing Dolomite from
Doan's Lead Mine (New Britain Mine), New Galena, New Britain Township, Bucks County, Pennsylvania, USA


Locality type:Mine
Classification
Species:Dolomite var: Iron-bearing Dolomite
Formula:Ca(Mg,Fe)(CO3)2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Iron-bearing Dolomite data
Locality Data:Click here to view Doan's Lead Mine (New Britain Mine), New Galena, New Britain Township, Bucks County, Pennsylvania, USA
Data Identifiers
Mindat Occurrence Record ID:479239
Long-form Identifier:1:3:479239:0
GUID (UUID V4):0
Nearest other occurrences of Iron-bearing Dolomite
30.8km (19.1 miles) ⓘWhim shaft, Perkiomen Mines, Audubon, Lower Providence Township, Montgomery County, Pennsylvania, USA
37.5km (23.3 miles) ⓘWheatley Mines, Schuylkill Township, Chester County, Pennsylvania, USA
58.9km (36.6 miles) ⓘJones mine, Caernarvon Township, Berks County, Pennsylvania, USA
References
Palache, Charles; Berman, Harry; Frondel, Clifford (1951) The System of Mineralogy (7th ed.) Vol. 2 - Halides, Nitrates, Borates, Carbonates, Sulfates, Phosphates, Arsenates, Tungstates, Molybdates, Etc. John Wiley and Sons.p.215
 
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