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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Tetrahedrite Subgroup from
Cortland Mine, Gold Brick Mining District, Gunnison County, Colorado, USA


Locality type:Mine
Classification
Species:'Tetrahedrite Subgroup' (not an IMA approved species)
Formula:Cu6(Cu4C22+)Sb4S12S
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Tetrahedrite Subgroup data
Locality Data:Click here to view Cortland Mine, Gold Brick Mining District, Gunnison County, Colorado, USA
Data Identifiers
Mindat Occurrence Record ID:375372
Long-form Identifier:1:3:375372:9
GUID (UUID V4):0
Nearest other occurrences of Tetrahedrite Subgroup
11.6km (7.2 miles) ⓘSilent Friend, Quartz Creek Mining District, Gunnison County, Colorado, USA
12.7km (7.9 miles) ⓘComplex group, Quartz Creek Mining District, Gunnison County, Colorado, USA
12.9km (8.0 miles) ⓘEmma H, Quartz Creek Mining District, Gunnison County, Colorado, USA
13.7km (8.5 miles) ⓘGold Hill Cumberland Pass, Quartz Creek Mining District, Gunnison County, Colorado, USA
13.9km (8.6 miles) ⓘIda May mine, Gold Hill Cumberland Pass, Quartz Creek Mining District, Gunnison County, Colorado, USA
15.3km (9.5 miles) ⓘHubnerite Lode, Gold Hill Cumberland Pass, Quartz Creek Mining District, Gunnison County, Colorado, USA
15.3km (9.5 miles) ⓘBlistered Horn Tunnel, Tincup Mining District (Pieplant Mining District), Gunnison County, Colorado, USA
17.5km (10.9 miles) ⓘAkron Victor Morning Star Mines, Tomichi Mining District (White Pine Mining District), Gunnison County, Colorado, USA
18.0km (11.2 miles) ⓘLilly, Tomichi Mining District (White Pine Mining District), Gunnison County, Colorado, USA
18.1km (11.2 miles) ⓘGold Cup Mine (Gold Cup Republic Mine), Tincup, Tincup Mining District (Pieplant Mining District), Gunnison County, Colorado, USA
References
(2005) Mineral Resources Data System (MRDS), US Geological Survey.
 
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