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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Tourmaline from
South Parbola Mine (Wheal Jennings; Parbola Mine), Reawla, Gwinear-Gwithian, Cornwall, England, UK


Locality type:Mine
Classification
Species:'Tourmaline' (not an IMA approved species)
Formula:AD3G6(T6O18)(BO3)3X3Z
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Tourmaline data
Locality Data:Click here to view South Parbola Mine (Wheal Jennings; Parbola Mine), Reawla, Gwinear-Gwithian, Cornwall, England, UK
Data Identifiers
Mindat Occurrence Record ID:690203
Long-form Identifier:1:3:690203:2
GUID (UUID V4):0
Nearest other occurrences of Tourmaline
3.8km (2.4 miles) ⓘWheal Pendarves, Killivose, Camborne, Cornwall, England, UK
4.2km (2.6 miles) ⓘWest Condurrow Mine, Killivose, Camborne, Cornwall, England, UK
4.2km (2.6 miles) ⓘWheal Bounty, Tryphena Mine, Beacon, Camborne, Cornwall, England, UK
4.6km (2.9 miles) ⓘPolcrebo Downs Mine, Nancegollan, Crowan, Cornwall, England, UK
4.7km (2.9 miles) ⓘSouth Tolcarne Mine, Beacon, Camborne, Cornwall, England, UK
5.1km (3.1 miles) ⓘSouth Condurrow Mine (Marshall's Shaft), Grenville United Mines, Troon, Camborne, Cornwall, England, UK
5.5km (3.4 miles) ⓘGreat Condurrow Mine, Beacon, Camborne, Cornwall, England, UK
5.6km (3.5 miles) ⓘKing Edward Mine, South Condurrow Mine, Grenville United Mines, Troon, Camborne, Cornwall, England, UK
5.6km (3.5 miles) ⓘWheal Grenville, Grenville United Mines, Troon, Camborne, Cornwall, England, UK
5.8km (3.6 miles) ⓘGreat Work Consols, Germoe, Cornwall, England, UK
References
Dines, H. G. (1956) The Metalliferous Mining Region of South-West England (1st ed.) Vol. 1. Geological Survey of Great Britain, London.pp.157-158
 
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