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
Unnamed Pegmatite quarry ("Groveland" pegmatite), Randville, Dickinson County, Michigan, USA


Locality type:Quarry
Classification
Species:Calcite
Formula:CaCO3
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Calcite data
Locality Data:Click here to view Unnamed Pegmatite quarry ("Groveland" pegmatite), Randville, Dickinson County, Michigan, USA
Data Identifiers
Mindat Occurrence Record ID:887115
Long-form Identifier:1:3:887115:2
GUID (UUID V4):0
Nearest other occurrences of Calcite
2.7km (1.7 miles) ⓘGroveland Mine, Randville, Dickinson County, Michigan, USA
9.9km (6.2 miles) ⓘMetropolitan Mine, Metropolitan, Dickinson County, Michigan, USA
10.9km (6.8 miles) ⓘMetronite Quarry, Felch, Dickinson County, Michigan, USA
11.1km (6.9 miles) ⓘHighway 69 Roadcut, Felch, Dickinson County, Michigan, USA
14.1km (8.8 miles) ⓘCamp 5 gravel pit, Mansfield Township, Iron County, Michigan, USA
22.3km (13.8 miles) ⓘBradley Mine, Iron Mountain, Dickinson County, Michigan, USA
22.5km (14.0 miles) ⓘWalpole Mine, Dickinson County, Michigan, USA
22.6km (14.1 miles) ⓘPewabic Mine, Iron Mountain, Dickinson County, Michigan, USA
22.8km (14.2 miles) ⓘChapin Mine, Iron Mountain, Dickinson County, Michigan, USA
24.1km (15.0 miles) ⓘMunroe Mine, Dickinson County, Michigan, USA
References
Buchholz, T.W., A.U. Falster & W.B. Simmons (2014), Accessory Mineralogy of an Evolved Dickinson County, Michigan, Pegmatite, a presentation before the 41st. Rochester Mineralogical Symposium, April 25, 2014.
 
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