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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Plagioclase from
Beryllium Lode Prospect, Micanite Mining District (Currant Creek Mining District), Colorado, USA


Locality type:Prospect
Classification
Species:'Plagioclase' (not an IMA approved species)
Formula:(Na,Ca)[(Si,Al)AlSi2]O8
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Plagioclase data
Locality Data:Click here to view Beryllium Lode Prospect, Micanite Mining District (Currant Creek Mining District), Colorado, USA
Data Identifiers
Mindat Occurrence Record ID:378993
Long-form Identifier:1:3:378993:3
GUID (UUID V4):0
Nearest other occurrences of Plagioclase
3.2km (2.0 miles) ⓘStar Girl Mine (Colorado Feldspar Company Mine), Micanite Mining District (Currant Creek Mining District), Colorado, USA
3.6km (2.2 miles) ⓘRosemont Mine (East Mine), Micanite Mining District (Currant Creek Mining District), Colorado, USA
4.2km (2.6 miles) ⓘLower South Mine (Whisper ? Mine), Micanite Mining District (Currant Creek Mining District), Colorado, USA
4.3km (2.7 miles) ⓘUpper South Mine, Micanite Mining District (Currant Creek Mining District), Colorado, USA
4.6km (2.8 miles) ⓘRowe's North Mine, Micanite Mining District (Currant Creek Mining District), Colorado, USA
5.3km (3.3 miles) ⓘWhopper Mine and Prospect, Micanite Mining District (Currant Creek Mining District), Colorado, USA
5.6km (3.5 miles) ⓘRowe's No. 2 Mine, Micanite Mining District (Currant Creek Mining District), Colorado, USA
5.9km (3.7 miles) ⓘRowe's South Prospect, Micanite Mining District (Currant Creek Mining District), Colorado, USA
6.3km (3.9 miles) ⓘBetty Mine (Lone Chimney Mine; Betty Lowe), Guffey Mining District, Park County, Colorado, USA
11.4km (7.1 miles) ⓘMeyers Ranch, Guffey Mining District, Park County, Colorado, USA
References
Hanley, J.B., Heinrich, E.W., Page, L.R. (1950) Pegmatite investigations in Colorado, Wyoming, and Utah, 1942-1944. Professional Paper 227. US Geological Survey doi:10.3133/pp227
(2005) Mineral Resources Data System (MRDS), US Geological Survey.
 
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