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
Brookdale Mine, Schuylkill Township, Chester County, Pennsylvania, USA


Locality type:Mine
Classification
Species:Ankerite
Formula:Ca(Fe2+,Mg)(CO3)2
Comments:I. D. questioned by A. Montgomery, Min PA 1922-69, pg. 4, Montgomery's findings contested by A.V. Heyl, (USGS study 1984, XRD. )
Confirmation
Validity:Unconfirmed/Questioned
Data
Mineral Data:Click here to view Ankerite data
Locality Data:Click here to view Brookdale Mine, Schuylkill Township, Chester County, Pennsylvania, USA
Data Identifiers
Mindat Occurrence Record ID:50236
Long-form Identifier:1:3:50236:8
GUID (UUID V4):0
Nearest other occurrences of Ankerite
0.6km (0.4 miles) ⓘWheatley Mines, Schuylkill Township, Chester County, Pennsylvania, USA
5.0km (3.1 miles) ⓘBlack Rock Tunnel (Conrail Tunnel), Phoenixville, Chester County, Pennsylvania, USA
7.2km (4.5 miles) ⓘEcton Mine, Perkiomen Mines, Audubon, Lower Providence Township, Montgomery County, Pennsylvania, USA
18.8km (11.7 miles) ⓘDownington, Chester County, Pennsylvania, USA
19.0km (11.8 miles) ⓘFrench Creek Mines, Saint Peters, Warwick Township, Chester County, Pennsylvania, USA
22.5km (14.0 miles) ⓘPrince's Soapstone Quarry, Lafayette Station, Philadelphia County, Pennsylvania, USA
38.1km (23.7 miles) ⓘDoan's Lead Mine (New Britain Mine), New Galena, New Britain Township, Bucks County, Pennsylvania, USA
86.0km (53.4 miles) ⓘDinning Rutile prospect, Clermont Mills, Harford County, Maryland, USA
References
Sloto, Ronald A. (1989) Famous Mineral Localities: The Phoenixville Lead-Silver Mines, Chester County, Pennsylvania. The Mineralogical Record, 20 (5) 369-386
 
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