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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Magnetite from
Green Mountain Mine (Copper Boy Mine), Grape Creek Mining District (Greenhorn Mining District), Fremont County, Colorado, USA


Locality type:Mine
Classification
Species:Magnetite
Formula:Fe2+Fe23+O4
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Magnetite data
Locality Data:Click here to view Green Mountain Mine (Copper Boy Mine), Grape Creek Mining District (Greenhorn Mining District), Fremont County, Colorado, USA
Data Identifiers
Mindat Occurrence Record ID:460608
Long-form Identifier:1:3:460608:6
GUID (UUID V4):0
Nearest other occurrences of Magnetite
3.3km (2.0 miles) ⓘIron Mountain, Iron Mountain complex, Fremont County, Colorado, USA
4.8km (3.0 miles) ⓘEl Plomo Mine, Grape Creek Mining District (Greenhorn Mining District), Fremont County, Colorado, USA
6.1km (3.8 miles) ⓘHorseshoe Mine (School Section Deposit), Grape Creek Mining District (Greenhorn Mining District), Fremont County, Colorado, USA
6.4km (4.0 miles) ⓘMcClure Gulch carbonatite, McClure Mountain Complex, Fremont County, Colorado, USA
6.6km (4.1 miles) ⓘBear Claims Nos. 1 and 2 1977 (Old Cunac Property; Wagner-Grape Creek Lode), East Pierce Gulch Area, Fremont County, Colorado, USA
6.7km (4.2 miles) ⓘJoker Mine (Rocky Mountain Boy Claims Patented Claims), Grape Creek Mining District (Greenhorn Mining District), Fremont County, Colorado, USA
8.1km (5.0 miles) ⓘDawson Gold project, Fremont County, Colorado, USA
8.9km (5.5 miles) ⓘDawson Mountain - Surprise Group (Unpatented Claims: Sam 1-15 1977 Part; Copper Boy 1902), Grape Creek Mining District (Greenhorn Mining District), Fremont County, Colorado, USA
10.8km (6.7 miles) ⓘLorain Pegmatite, Eight Mile Park Pegmatite Mining District, Fremont County, Colorado, USA
11.6km (7.2 miles) ⓘPine Creek drainage (Pine Gulch), Gem Park complex, Fremont County, Colorado, USA
References
Eckel, Edwin Butt; Cobban, Robert R.; Mosburg, Shirley K.; Foord, Eugene E. (1997) Minerals of Colorado. Fulcrum Publishing.
 
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