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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Calcite from
Greenhurth Mine, Forest and Frith, County Durham, England, UK


Locality type:Mine
Classification
Species:Calcite
Formula:CaCO3
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Calcite data
Locality Data:Click here to view Greenhurth Mine, Forest and Frith, County Durham, England, UK
Data Identifiers
Mindat Occurrence Record ID:235197
Long-form Identifier:1:3:235197:1
GUID (UUID V4):0
Nearest other occurrences of Calcite
2.7km (1.7 miles) ⓘLady's Rake Mine, Harwood, Forest and Frith, County Durham, England, UK
3.7km (2.3 miles) ⓘGrasshill Mine, Harwood, Forest and Frith, County Durham, England, UK
5.3km (3.3 miles) ⓘWindy Brow Vein, Alston Moor, Eden, Cumbria, England, UK
5.3km (3.3 miles) ⓘTynehead Mine, Garrigill, Alston Moor, Eden, Cumbria, England, UK
5.4km (3.4 miles) ⓘLangtae Head Mine (Longty Head Mine), Ireshope Moor, Stanhope, County Durham, England, UK
7.3km (4.5 miles) ⓘGreat Sulphur vein, Garrigill, Alston Moor, Eden, Cumbria, England, UK
7.4km (4.6 miles) ⓘLangdon Beck Mine, Forest and Frith, County Durham, England, UK
8.7km (5.4 miles) ⓘWellheads Hush, Stanhope, County Durham, England, UK
9.6km (5.9 miles) ⓘCarricks Mine, Ireshopeburn, Stanhope, County Durham, England, UK
9.6km (6.0 miles) ⓘMiddlecleugh Upper Level, Nenthead, Alston Moor, Eden, Cumbria, England, UK
References
Dunham, K.C. (1990) Geology of the Northern Pennine Orefield, Volume 1, Tyne to Stainmore. 2nd edition, British Geological Survey.pages 90, 231-234
 
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