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
Great Work Consols, Germoe, 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 Great Work Consols, Germoe, Cornwall, England, UK
Data Identifiers
Mindat Occurrence Record ID:548307
Long-form Identifier:1:3:548307:5
GUID (UUID V4):0
Nearest other occurrences of Tourmaline
2.7km (1.7 miles) ⓘTregembo, St Hilary, Cornwall, England, UK
3.6km (2.2 miles) ⓘGreat Wheal Fortune, Breage, Cornwall, England, UK
4.4km (2.7 miles) ⓘPenberthy Croft Mine, St Hilary, Cornwall, England, UK
5.7km (3.5 miles) ⓘPolcrebo Downs Mine, Nancegollan, Crowan, Cornwall, England, UK
5.8km (3.6 miles) ⓘSouth Parbola Mine (Wheal Jennings; Parbola Mine), Reawla, Gwinear-Gwithian, Cornwall, England, UK
6.2km (3.8 miles) ⓘWheal Prosper, St Hilary, Cornwall, England, UK
8.2km (5.1 miles) ⓘMarazion Beach, Marazion, Cornwall, England, UK
9.1km (5.7 miles) ⓘWheal Pendarves, Killivose, Camborne, Cornwall, England, UK
9.5km (5.9 miles) ⓘTrencrom Hill, Trencrom, Ludgvan, Cornwall, England, UK
9.5km (5.9 miles) ⓘWheal Bounty, Tryphena Mine, Beacon, Camborne, Cornwall, England, UK
References
Collins, J. H. (1871) A Handbook to the Mineralogy of Cornwall and Devon. Heard and Sons, Truro.
 
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