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
Silver Vein Mine (Beacon Hill Mine; Wheal Fortescue), Lostwithiel, Cornwall, England, UK


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 Silver Vein Mine (Beacon Hill Mine; Wheal Fortescue), Lostwithiel, Cornwall, England, UK
Data Identifiers
Mindat Occurrence Record ID:192121
Long-form Identifier:1:3:192121:2
GUID (UUID V4):0
Nearest other occurrences of Calcite
2.0km (1.3 miles) ⓘTerrace Hill Quarry, Lostwithiel, Cornwall, England, UK
8.8km (5.5 miles) ⓘSouth Herodsfoot Mine, Duloe, Cornwall, England, UK
8.9km (5.5 miles) ⓘHerodsfoot Mine (North Herodsfoot Mine), Lanreath, Cornwall, England, UK
15.4km (9.6 miles) ⓘPolgooth Mine (Old Polgooth Mine; Polgooth United Mine; Tregontrees and Old Polgooth Mine), Polgooth, St Mewan, Cornwall, England, UK
15.8km (9.8 miles) ⓘWest Wheal Mary Ann (West Mary Ann Mine), Roseland, Menheniot, Cornwall, England, UK
16.9km (10.5 miles) ⓘWheal Mary Ann, Menheniot, Cornwall, England, UK
16.9km (10.5 miles) ⓘWheal Trelawny (incl. Wheal Honey), Menheniot, Cornwall, England, UK
17.7km (11.0 miles) ⓘWheal Treweatha, Menheniot, Cornwall, England, UK
17.8km (11.0 miles) ⓘSouth Caradon Mine, Caradon Hill, St Cleer, Cornwall, England, UK
18.6km (11.5 miles) ⓘWheal Ludcott, Wrey and Ludcott United Mines, St Ive, Cornwall, England, UK
References
 
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