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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Marcasite from
Blackcraig Mine (East Blackcraig Mine; West Blackcraig Mine), Blackcraig, Dumfries and Galloway, Scotland, UK


Locality type:Mine
Classification
Species:Marcasite
Formula:FeS2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Marcasite data
Locality Data:Click here to view Blackcraig Mine (East Blackcraig Mine; West Blackcraig Mine), Blackcraig, Dumfries and Galloway, Scotland, UK
Data Identifiers
Mindat Occurrence Record ID:7478
Long-form Identifier:1:3:7478:0
GUID (UUID V4):0
Nearest other occurrences of Marcasite
63.4km (39.4 miles) ⓘGlencrief Burn, Wanlockhead, Dumfries and Galloway, Scotland, UK
64.1km (39.8 miles) ⓘStraitstep Vein (Margaret's Vein), Wanlock Dod-Whytes Cleuch, Wanlockhead, Dumfries and Galloway, Scotland, UK
64.5km (40.1 miles) ⓘBelton Grain vein, Wanlock Dod-Whytes Cleuch, Wanlockhead, Dumfries and Galloway, Scotland, UK
65.4km (40.6 miles) ⓘBrow Vein, Wanlock Dod, Leadhills, South Lanarkshire, Scotland, UK
65.7km (40.8 miles) ⓘWilsons shaft (Brown's vein), Mine Hill, Leadhills, South Lanarkshire, Scotland, UK
86.5km (53.8 miles) ⓘForce Crag Mine, Coledale, Above Derwent, Allerdale, Cumbria, England, UK
87.5km (54.4 miles) ⓘCobalt Mine, Scar Crag, Causey Pike, Above Derwent, Allerdale, Cumbria, England, UK
90.5km (56.2 miles) ⓘGoldscope Mine, Newlands Valley, Above Derwent, Allerdale, Cumbria, England, UK
91.3km (56.7 miles) ⓘOld Potts Gill Mine, Potts Gill, Caldbeck, Allerdale, Cumbria, England, UK
91.6km (56.9 miles) ⓘDale Head Mine, Newlands Valley, Above Derwent, Allerdale, Cumbria, England, UK
References
Livingstone, A., Macpherson, H.G., Jackson, B. (1976) Wroewolfeite and other langite-group minerals from Blackcraig, Kirkcudbrightshire. Mineralogical Magazine, 40 (316) 893-894 doi:10.1180/minmag.1976.040.316.12
 
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