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
New Brancepeth Colliery (Sleetburn Colliery), Deerness Valley, Brandon and Byshottles, County Durham, England, UK


Locality type:Colliery
Classification
Species:Calcite
Formula:CaCO3
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Calcite data
Locality Data:Click here to view New Brancepeth Colliery (Sleetburn Colliery), Deerness Valley, Brandon and Byshottles, County Durham, England, UK
Data Identifiers
Mindat Occurrence Record ID:894977
Long-form Identifier:1:3:894977:6
GUID (UUID V4):0
Nearest other occurrences of Calcite
10.0km (6.2 miles) ⓘSouth Moor Colliery, Stanley, County Durham, England, UK
12.0km (7.4 miles) ⓘCoxhoe Quarry, Raisby, Coxhoe, County Durham, England, UK
13.8km (8.6 miles) ⓘRaisby Quarries (Raisby Hill Quarry), Kelloe, County Durham, England, UK
14.5km (9.0 miles) ⓘRaisby railway cutting, Kelloe, County Durham, England, UK
15.9km (9.9 miles) ⓘCastleside Smelting Mill slag locality, Healeyfield, County Durham, England, UK
17.6km (11.0 miles) ⓘOld Towns Quarry, Heighington, Darlington, England, UK
19.9km (12.3 miles) ⓘHylton Quarry, Sunderland, Tyne & Wear, England, UK
21.6km (13.4 miles) ⓘRogerley Mine, Rogerley Quarry, Stanhope, County Durham, England, UK
21.6km (13.4 miles) ⓘHidden Forest Pocket, Sutcliffe and Greenbank veins intersection, Diana Maria Mine, Rogerley Quarry, Stanhope, County Durham, England, UK
21.7km (13.5 miles) ⓘWhy-Aye Pocket, Diana Maria Mine, Rogerley Quarry, Stanhope, County Durham, England, UK
References
Smythe, J. A. (1947) Chemical Analysis of ullmannite from New Brancepeth, Co. Durham. Mineralogical Magazine and Journal of the Mineralogical Society, 28 (198) 173-174 doi:10.1180/minmag.1947.028.198.07
 
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