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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Fluorite from
Cowgreen Mine, Forest and Frith, County Durham, England, UK


Locality type:Mine
Classification
Species:Fluorite
Formula:CaF2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Fluorite data
Locality Data:Click here to view Cowgreen Mine, Forest and Frith, County Durham, England, UK
Data Identifiers
Mindat Occurrence Record ID:235223
Long-form Identifier:1:3:235223:7
GUID (UUID V4):0
Nearest other occurrences of Fluorite
4.2km (2.6 miles) ⓘLangdon Beck Mine, Forest and Frith, County Durham, England, UK
4.2km (2.6 miles) ⓘGrasshill Mine, Harwood, Forest and Frith, County Durham, England, UK
4.9km (3.0 miles) ⓘAshgillhead Mine, Harwood, Forest and Frith, County Durham, England, UK
5.3km (3.3 miles) ⓘMetalband Mine, Alston Moor, Eden, Cumbria, England, UK
5.9km (3.7 miles) ⓘNether Hearth Mine, Dufton, Eden, Cumbria, England, UK
6.2km (3.9 miles) ⓘTeeside Mine, Milburn, Eden, Cumbria, England, UK
6.2km (3.9 miles) ⓘLangtae Head Mine (Longty Head Mine), Ireshope Moor, Stanhope, County Durham, England, UK
7.4km (4.6 miles) ⓘLodge Sike Mine, Ireshopeburn, Stanhope, County Durham, England, UK
8.0km (4.9 miles) ⓘCalvert Mine, Alston Moor, Eden, Cumbria, England, UK
8.4km (5.2 miles) ⓘSwinhopehead Mine, Daddry Shield, Stanhope, County Durham, England, UK
References
Dunham, K.C. (1990) Geology of the Northern Pennine Orefield, Volume 1, Tyne to Stainmore. 2nd edition, British Geological Survey.pages 232, 235-237
 
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