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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Phlogopite 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:Phlogopite
Formula:KMg3(AlSi3O10)(OH)2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Phlogopite 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:355200
Long-form Identifier:1:3:355200:1
GUID (UUID V4):0
Nearest other occurrences of Phlogopite
17.7km (11.0 miles) ⓘGem Mine, Gem Park complex, Fremont County, Colorado, USA
18.3km (11.4 miles) ⓘVermiculite Mine (MRDS - 10013422), Gem Park complex, Fremont County, Colorado, USA
18.3km (11.4 miles) ⓘNiles Mine, Gem Park complex, Custer County, Colorado, USA
19.6km (12.2 miles) ⓘMcClure Mountain, Iron Mountain complex, Fremont County, Colorado, USA
38.1km (23.7 miles) ⓘSedalia Mine (Sedalia Copper Mine), Sedalia Mining District, Chaffee County, Colorado, USA
38.7km (24.0 miles) ⓘAce High - Jackpot Prospect, Turret Mining District, Chaffee County, Colorado, USA
39.0km (24.2 miles) ⓘIndependence Mine, Turret Mining District, Chaffee County, Colorado, USA
40.6km (25.3 miles) ⓘIron Mountain Mine (Iron Mine; Iron Hill Mine), Rosita Mining District, Custer County, Colorado, USA
46.2km (28.7 miles) ⓘCinderella, Chaffee County, Colorado, USA
63.4km (39.4 miles) ⓘWest Point, Tomichi Mining District (White Pine Mining District), Gunnison County, Colorado, USA
References
Am Min 50:1179-1212
(2005) Mineral Resources Data System (MRDS), US Geological Survey.
 
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