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
Star Coal Company strip mine, Mahaska County, Iowa, USA


Locality type:Mine
Classification
Species:Calcite
Formula:CaCO3
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Calcite data
Locality Data:Click here to view Star Coal Company strip mine, Mahaska County, Iowa, USA
Data Identifiers
Mindat Occurrence Record ID:210476
Long-form Identifier:1:3:210476:8
GUID (UUID V4):0
Nearest other occurrences of Calcite
2.2km (1.4 miles) ⓘMich mine, Oskaloosa, Mahaska County, Iowa, USA
8.4km (5.2 miles) ⓘSwanson mine, Knoxville, Marion County, Iowa, USA
13.4km (8.3 miles) ⓘLovilia area, Monroe County, Iowa, USA
13.9km (8.6 miles) ⓘEddyville area coal strip mines, Wapello County, Iowa, USA
19.4km (12.0 miles) ⓘPershing area, Marion County, Iowa, USA
20.3km (12.6 miles) ⓘCalcite locality, Pella, Marion County, Iowa, USA
21.0km (13.1 miles) ⓘJude coal mine, Bussey area, Marion County, Iowa, USA
35.6km (22.1 miles) ⓘLimestone quarry, Poweshiek County, Iowa, USA
52.7km (32.7 miles) ⓘKeswick quarry, Keswick, Keokuk County, Iowa, USA
54.1km (33.6 miles) ⓘKaser Quarry, Ollie, Keokuk County, Iowa, USA
References
Smith, Arthur E., Prior, Harold L. (2002) Iowa Mineral Locality Index. Rocks & Minerals, 77 (6) 404-413 doi:10.1080/00357529.2002.9924893
 
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