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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Bertrandite from
Wheal Metal, Carnmeal Downs, Breage, Cornwall, England, UK


Locality type:Mine
Classification
Species:Bertrandite
Formula:Be4(Si2O7)(OH)2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Bertrandite data
Locality Data:Click here to view Wheal Metal, Carnmeal Downs, Breage, Cornwall, England, UK
Data Identifiers
Mindat Occurrence Record ID:1872
Long-form Identifier:1:3:1872:2
GUID (UUID V4):0
Nearest other occurrences of Bertrandite
10.5km (6.5 miles) ⓘGreat Condurrow Mine, Beacon, Camborne, Cornwall, England, UK
10.9km (6.8 miles) ⓘMaen Quarry, Constantine, Cornwall, England, UK
12.2km (7.6 miles) ⓘHalvosso Quarry (Halvasso Quarry; Kessel Downs Quarry), Mabe, Cornwall, England, UK
12.2km (7.6 miles) ⓘSouth Crofty Mine, Pool, Carn Brea, Cornwall, England, UK
12.9km (8.0 miles) ⓘTrolvis Quarry, Longdowns, Stithians, Cornwall, England, UK
13.5km (8.4 miles) ⓘChywoon Quarry, Mabe, Cornwall, England, UK
38.5km (23.9 miles) ⓘSouth Terras Mine (Resugga & Tolgarrick Mine; Union Mine; Uranium Mine), St Stephen-in-Brannel, Cornwall, England, UK
75.7km (47.0 miles) ⓘGold-diggings Quarry (Swit Quarry), Craddock Moor, St Cleer, Cornwall, England, UK
76.5km (47.5 miles) ⓘCheesewring Quarry, Minions, Linkinhorne, Cornwall, England, UK
86.9km (54.0 miles) ⓘEast Kit Hill Mine, Kit Hill United Mines (incl. Kit Hill Great Consols), Callington, Stokeclimsland, Cornwall, England, UK
References
Golley, Peter, Williams, Richard (1995) Cornish Mineral Reference Manual. Endsleigh Book Co., Truro. 71pp.
 
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