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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Thulite from
Cotopaxi Mine (Cotopaxi lode; Gumaer Mine; Fannie lode; Fannie Mill), Mine Gulch, Cotopaxi, Cotopaxi Mining District, Fremont County, Colorado, USA


Locality type:Mine
Classification
Species:Zoisite var: Thulite
Formula:{Ca2}{Al,Mn33+}(Si2O7)(SiO4)O(OH)
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Thulite data
Locality Data:Click here to view Cotopaxi Mine (Cotopaxi lode; Gumaer Mine; Fannie lode; Fannie Mill), Mine Gulch, Cotopaxi, Cotopaxi Mining District, Fremont County, Colorado, USA
Data Identifiers
Mindat Occurrence Record ID:34980
Long-form Identifier:1:3:34980:2
GUID (UUID V4):0
Nearest other occurrences of Thulite
32.0km (19.9 miles) ⓘFour Claim Group, Currant Creek Area, Guffey Mining District (Freshwater Mining District), Fremont County, Colorado, USA
41.0km (25.5 miles) ⓘCopper King Mine (Copper Queen Mine), Guffey Mining District, Park County, Colorado, USA
42.7km (26.5 miles) ⓘGuffey District; West Occurrence, Guffey Mining District, Park County, Colorado, USA
77.4km (48.1 miles) ⓘVictory Prospect (Victory Group), Tarryall Springs Mining District (Puma City), Park County, Colorado, USA
References
Eckel, Edwin Butt; Cobban, Robert R.; Mosburg, Shirley K.; Foord, Eugene E. (1997) Minerals of Colorado. Fulcrum Publishing.
 
and/or  
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