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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Manganite from
Trevena Manganese Mine, Tintagel, Cornwall, England, UK


Locality type:Mine
Classification
Species:Manganite
Formula:Mn3+O(OH)
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Manganite data
Locality Data:Click here to view Trevena Manganese Mine, Tintagel, Cornwall, England, UK
Data Identifiers
Mindat Occurrence Record ID:7242
Long-form Identifier:1:3:7242:7
GUID (UUID V4):0
Nearest other occurrences of Manganite
18.9km (11.7 miles) ⓘLidcott Mine, Laneast, Cornwall, England, UK
27.4km (17.1 miles) ⓘRestormel Royal Iron Mine (Trinity Mine), Lostwithiel, Cornwall, England, UK
31.3km (19.4 miles) ⓘRuthers Mine (Ruthvoes Mine; Indian Queens Iron Mine), Indian Queens, St Enoder, Cornwall, England, UK
32.2km (20.0 miles) ⓘWheal Harris, Lifton, West Devon, Devon, England, UK
41.5km (25.8 miles) ⓘWheal Mexico (Trebellan Mine; incl. Treworthy Mine), Perranzabuloe, Cornwall, England, UK
59.0km (36.7 miles) ⓘBuckett's Mine, Redruth, Cornwall, England, UK
86.5km (53.8 miles) ⓘWest Woody Bay, Woody Bay, Martinhoe, North Devon, Devon, England, UK
88.0km (54.7 miles) ⓘWheal Cock, Botallack Mine, Botallack, St Just, Cornwall, England, UK
88.2km (54.8 miles) ⓘBotallack Mine, Botallack, St Just, Cornwall, England, UK
88.8km (55.1 miles) ⓘWheal Drea, Botallack, St Just, Cornwall, England, UK
References
Golley, Peter, Williams, Richard (1995) Cornish Mineral Reference Manual. Endsleigh Book Co., Truro. 71pp.
 
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