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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Epidote 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:Epidote
Formula:(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Epidote 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:34969
Long-form Identifier:1:3:34969:9
GUID (UUID V4):0
Nearest other occurrences of Epidote
3.8km (2.4 miles) ⓘMcCoy prospects, Cotopaxi Pegmatite area, Cotopaxi, Cotopaxi Mining District, Fremont County, Colorado, USA
15.3km (9.5 miles) ⓘJoker Lode Iron Deposit (Iron Age Mine; Long Gulch Lode Claims; Iron Mine), Long Gulch Area, Fremont County, Colorado, USA
22.6km (14.0 miles) ⓘRed Mountain Prospect (Mowe; Hollister and Drake Operation Claims: Mary Jean; Lucky Strike; Shamrock Claims), Copper Gulch Area, Fremont County, Colorado, USA
23.2km (14.4 miles) ⓘJack of Diamonds Prospect, McIntyre Hills Area, Fremont County, Colorado, USA
24.4km (15.2 miles) ⓘIron Mountain Mine (Iron Mountain Deposit; Iron Mountain Titaniferous Magnetite Deposit), McClure Mountain Complex, Fremont County, Colorado, USA
27.8km (17.3 miles) ⓘMorning Star Claims 1943, McIntyre Gulch Area, Fremont County, Colorado, USA
32.0km (19.9 miles) ⓘFour Claim Group, Currant Creek Area, Guffey Mining District (Freshwater Mining District), Fremont County, Colorado, USA
32.9km (20.4 miles) ⓘAlder Creek, Bonanza Mining District (Kerber Creek Mining District; Blake Mining District), Saguache County, Colorado, USA
32.9km (20.5 miles) ⓘJoker Mine (Rocky Mountain Boy Claims Patented Claims), Grape Creek Mining District (Greenhorn Mining District), Fremont County, Colorado, USA
34.4km (21.4 miles) ⓘDawson Gold project, Fremont County, Colorado, USA
References
Am Min 50:1179-1212
Eckel, Edwin Butt; Cobban, Robert R.; Mosburg, Shirley K.; Foord, Eugene E. (1997) Minerals of Colorado. Fulcrum Publishing.
Spry, Paul G.; McFadden, Scott; Teale, Graham S.; Alers, Brian; Shallow, John M.; Glenn, Justin M. (2022) Nodular sillimanite rocks as field indicators to metamorphosed massive sulfide deposits. Ore Geology Reviews, 141. 104632 doi:10.1016/j.oregeorev.2021.104632
 
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