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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Arsenopyrite from
Morning Star Mine, Silver Creek Mining District, Snohomish County, Washington, USA


Locality type:Mine
Classification
Species:Arsenopyrite
Formula:FeAsS
Habit:brilliant crystals to .3"
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Arsenopyrite data
Locality Data:Click here to view Morning Star Mine, Silver Creek Mining District, Snohomish County, Washington, USA
Data Identifiers
Mindat Occurrence Record ID:93797
Long-form Identifier:1:3:93797:1
GUID (UUID V4):0
Nearest other occurrences of Arsenopyrite
0.6km (0.3 miles) ⓘBen Butler Prospect, Silver Creek Mining District, Snohomish County, Washington, USA
1.1km (0.7 miles) ⓘRambler Prospect, Silver Creek Mining District, Snohomish County, Washington, USA
1.5km (0.9 miles) ⓘJasperson Mine, Silver Creek Mining District, Snohomish County, Washington, USA
1.6km (1.0 miles) ⓘUndaunted Prospect, Silver Creek Mining District, Snohomish County, Washington, USA
1.7km (1.0 miles) ⓘMineral Center Prospect, Silver Creek Mining District, Snohomish County, Washington, USA
2.2km (1.4 miles) ⓘGray Copper Mines, Silver Creek Mining District, Snohomish County, Washington, USA
2.7km (1.6 miles) ⓘSultan King Mine, North Fork of the Sultan River, Sultan Mining District, Snohomish County, Washington, USA
3.5km (2.1 miles) ⓘDaisy Mine, Troublesome Creek, Silver Creek Mining District, Snohomish County, Washington, USA
3.5km (2.2 miles) ⓘMackinaw Mine, Monte Cristo Mining District, Snohomish County, Washington, USA
4.2km (2.6 miles) ⓘSilver Creek Mine, Silver Creek Mining District, Snohomish County, Washington, USA
References
Cannon, Bart (1975) Minerals of Washington. Cordilleran. 184 pp.p.51
 
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