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
Alva Silver Mine, Silver Glen, Alva, Clackmannanshire, 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 Alva Silver Mine, Silver Glen, Alva, Clackmannanshire, Scotland, UK
Data Identifiers
Mindat Occurrence Record ID:43359
Long-form Identifier:1:3:43359:0
GUID (UUID V4):0
Nearest other occurrences of Marcasite
33.5km (20.8 miles) ⓘOrrock Quarry, Kirkcaldy, Fife, Scotland, UK
83.1km (51.6 miles) ⓘBrow Vein, Wanlock Dod, Leadhills, South Lanarkshire, Scotland, UK
83.3km (51.8 miles) ⓘWilsons shaft (Brown's vein), Mine Hill, Leadhills, South Lanarkshire, Scotland, UK
83.9km (52.1 miles) ⓘBelton Grain vein, Wanlock Dod-Whytes Cleuch, Wanlockhead, Dumfries and Galloway, Scotland, UK
83.9km (52.1 miles) ⓘStraitstep Vein (Margaret's Vein), Wanlock Dod-Whytes Cleuch, Wanlockhead, Dumfries and Galloway, Scotland, UK
84.7km (52.6 miles) ⓘGlencrief Burn, Wanlockhead, Dumfries and Galloway, Scotland, UK
References
[J.Russell Soc 1998:23]
 
and/or  
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