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
Wheal Mary Ann, Menheniot, Cornwall, England, UK


01742440017370440985317.jpg
Calcite

Wheal Mary Ann, Menheniot, Cornwall, England, UK
04765340017370440987323.jpg
Calcite, etc.

Wheal Mary Ann, Menheniot, Cornwall, England, UK
01742440017370440985317.jpg
Calcite

Wheal Mary Ann, Menheniot, Cornwall, England, UK
05653010017271985006056.jpg
Calcite, etc.

Wheal Mary Ann, Menheniot, Cornwall, England, UK
00634230017272728294419.jpg
Calcite

Wheal Mary Ann, Menheniot, Cornwall, England, UK
05653010017271985006056.jpg
Calcite, etc.

Wheal Mary Ann, Menheniot, Cornwall, England, UK
Locality type:Mine
Classification
Species:Calcite
Formula:CaCO3
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Quartz1
Pyrite1
Data
Mineral Data:Click here to view Calcite data
Locality Data:Click here to view Wheal Mary Ann, Menheniot, Cornwall, England, UK
Photo GalleryView Gallery (2 photos)
Data Identifiers
Mindat Occurrence Record ID:2589
Long-form Identifier:1:3:2589:8
GUID (UUID V4):0
Nearest other occurrences of Calcite
0.1km (0.1 miles) ⓘWheal Trelawny (incl. Wheal Honey), Menheniot, Cornwall, England, UK
1.2km (0.8 miles) ⓘWest Wheal Mary Ann (West Mary Ann Mine), Roseland, Menheniot, Cornwall, England, UK
2.3km (1.4 miles) ⓘWheal Treweatha, Menheniot, Cornwall, England, UK
2.9km (1.8 miles) ⓘWheal Ludcott, Wrey and Ludcott United Mines, St Ive, Cornwall, England, UK
3.2km (2.0 miles) ⓘWheal Wrey, Wrey and Ludcott United Mines, St Ive, Cornwall, England, UK
6.7km (4.2 miles) ⓘSouth Caradon Mine, Caradon Hill, St Cleer, Cornwall, England, UK
8.3km (5.2 miles) ⓘHerodsfoot Mine (North Herodsfoot Mine), Lanreath, Cornwall, England, UK
8.6km (5.3 miles) ⓘSouth Herodsfoot Mine, Duloe, Cornwall, England, UK
14.8km (9.2 miles) ⓘHingston Down Quarry, Gunnislake, Calstock, Cornwall, England, UK
16.9km (10.5 miles) ⓘSilver Vein Mine (Beacon Hill Mine; Wheal Fortescue), Lostwithiel, Cornwall, England, UK
References
Hall, Townshend M. (1868) The Mineralogist's Directory: or, a guide to the Principal Mineral Localities in the United Kingdom of Great Britain and Ireland. Edward Stanford.
Henwood, W.J. (1871) Observations on Metalliferous Deposits: On the Lead Mines of Menheniot, Lanreath and Saint Pinnock. Transactions of the Royal Geological Society of Cornwall, 8. p.699-722.
 
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