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
Herodsfoot Mine (North Herodsfoot Mine), Lanreath, Cornwall, England, UK


01366930017363767992413.jpg
Calcite, etc.

Herodsfoot Mine, Lanreath, Cornwall, England, UK
01366930017363767992413.jpg
Calcite, etc.

Herodsfoot Mine, Lanreath, Cornwall, England, UK
07983510017363767991908.jpg
Calcite, etc.

Herodsfoot Mine, Lanreath, Cornwall, England, UK
Locality type:Mine
Classification
Species:Calcite
Formula:CaCO3
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Tetrahedrite Subgroup1
Chalcopyrite1
Galena1
Data
Mineral Data:Click here to view Calcite data
Locality Data:Click here to view Herodsfoot Mine (North Herodsfoot Mine), Lanreath, Cornwall, England, UK
Data Identifiers
Mindat Occurrence Record ID:2593
Long-form Identifier:1:3:2593:5
GUID (UUID V4):0
Nearest other occurrences of Calcite
0.5km (0.3 miles) ⓘSouth Herodsfoot Mine, Duloe, Cornwall, England, UK
7.4km (4.6 miles) ⓘWest Wheal Mary Ann (West Mary Ann Mine), Roseland, Menheniot, Cornwall, England, UK
8.3km (5.2 miles) ⓘWheal Mary Ann, Menheniot, Cornwall, England, UK
8.3km (5.2 miles) ⓘWheal Trelawny (incl. Wheal Honey), Menheniot, Cornwall, England, UK
8.9km (5.5 miles) ⓘSilver Vein Mine (Beacon Hill Mine; Wheal Fortescue), Lostwithiel, Cornwall, England, UK
9.7km (6.0 miles) ⓘWheal Treweatha, Menheniot, Cornwall, England, UK
10.5km (6.5 miles) ⓘWheal Ludcott, Wrey and Ludcott United Mines, St Ive, Cornwall, England, UK
10.8km (6.7 miles) ⓘWheal Wrey, Wrey and Ludcott United Mines, St Ive, Cornwall, England, UK
10.8km (6.7 miles) ⓘTerrace Hill Quarry, Lostwithiel, Cornwall, England, UK
11.4km (7.1 miles) ⓘSouth Caradon Mine, Caradon Hill, St Cleer, Cornwall, England, UK
References
Starkey, Roy (2012) The Herodsfoot mine, Lanreath, Cornwall, England. The Mineralogical Record, 43 (4) 411-486
 
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