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
Wheal Harmony (Wheal Garden), Treleigh Wood Mine, Redruth, 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 Wheal Harmony (Wheal Garden), Treleigh Wood Mine, Redruth, Cornwall, England, UK
Data Identifiers
Mindat Occurrence Record ID:985171
Long-form Identifier:1:3:985171:9
GUID (UUID V4):0
Nearest other occurrences of Tourmaline
1.1km (0.7 miles) ⓘWheal Peevor, Redruth, Cornwall, England, UK
1.6km (1.0 miles) ⓘPednandrea Mine (Pedn-an-Drea Mine), Redruth, Cornwall, England, UK
2.4km (1.5 miles) ⓘWheal Rose, Great North Downs Mine (incl. Wheal Hawke), Scorrier, Redruth, Cornwall, England, UK
2.8km (1.7 miles) ⓘSouth Wheal Hawke (incl. Scorrier Wolfram Prospect), Great North Downs Mine (incl. Wheal Hawke), Scorrier, Redruth, Cornwall, England, UK
3.0km (1.8 miles) ⓘSouth Carn Brea Mine, Carnkie, Carn Brea, Cornwall, England, UK
3.5km (2.2 miles) ⓘWest Basset Stamps (Wheal Haste), Basset Mines, Carnkie, Carn Brea, Cornwall, England, UK
3.7km (2.3 miles) ⓘWheal Basset, Basset Mines, Carnkie, Carn Brea, Cornwall, England, UK
3.8km (2.3 miles) ⓘWheal Concord, East Treskerby Mine, Skinners Bottom, St Agnes, Cornwall, England, UK
3.8km (2.4 miles) ⓘWheal Unity, Gwennap, Cornwall, England, UK
3.9km (2.4 miles) ⓘKillifreth Mine, Chacewater, Cornwall, England, UK
References
Golley, Peter, Williams, Richard (1995) Cornish Mineral Reference Manual. Endsleigh Book Co., Truro. 71pp.
 
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