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 Crofty Mine, Pool, Carn Brea, Cornwall, England, UK


Locality type:Project
Classification
Species:'Tourmaline' (not an IMA approved species)
Formula:AD3G6(T6O18)(BO3)3X3Z
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Cassiterite3
Quartz3
Data
Mineral Data:Click here to view Tourmaline data
Locality Data:Click here to view South Crofty Mine, Pool, Carn Brea, Cornwall, England, UK
Data Identifiers
Mindat Occurrence Record ID:17983
Long-form Identifier:1:3:17983:2
GUID (UUID V4):0
Nearest other occurrences of Tourmaline
0.1km (0.1 miles) ⓘNew Cook's Kitchen Mine, Pool, Carn Brea, Cornwall, England, UK
0.5km (0.3 miles) ⓘTincroft Mine, Pool, Carn Brea, Cornwall, England, UK
0.8km (0.5 miles) ⓘNew Roskear Shaft, Dolcoath Mine, Camborne, Cornwall, England, UK
1.8km (1.1 miles) ⓘGreat Condurrow Mine, Beacon, Camborne, Cornwall, England, UK
2.0km (1.3 miles) ⓘWest Wheal Frances, Basset Mines, Carnkie, Carn Brea, Cornwall, England, UK
2.0km (1.3 miles) ⓘKing Edward Mine, South Condurrow Mine, Grenville United Mines, Troon, Camborne, Cornwall, England, UK
2.3km (1.5 miles) ⓘWheal Grenville, Grenville United Mines, Troon, Camborne, Cornwall, England, UK
2.4km (1.5 miles) ⓘSouth Carn Brea Mine, Carnkie, Carn Brea, Cornwall, England, UK
2.5km (1.6 miles) ⓘSouth Condurrow Mine (Marshall's Shaft), Grenville United Mines, Troon, Camborne, Cornwall, England, UK
2.6km (1.6 miles) ⓘWest Basset Stamps (Wheal Haste), Basset Mines, Carnkie, Carn Brea, 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.317-326
 
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