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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Malachite from
Keystone Mine (Keystone claim; Goat claim), Slumgullion Pass, Castle Dome Mining District, Castle Dome Mountains, Yuma County, Arizona, USA


Locality type:Mine
Classification
Species:Malachite
Formula:Cu2(CO3)(OH)2
Comments:A few spots in/on quartz.
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Malachite data
Locality Data:Click here to view Keystone Mine (Keystone claim; Goat claim), Slumgullion Pass, Castle Dome Mining District, Castle Dome Mountains, Yuma County, Arizona, USA
Data Identifiers
Mindat Occurrence Record ID:239455
Long-form Identifier:1:3:239455:8
GUID (UUID V4):0
Nearest other occurrences of Malachite
12.5km (7.8 miles) ⓘCastle Dome Mountains, Yuma County, Arizona, USA
27.0km (16.8 miles) ⓘBlodgett Mine (Blodgett prospect), Engesser Pass, Tank Mountains Mining District, Tank Mountains, Yuma County, Arizona, USA
30.8km (19.1 miles) ⓘAnnie Mine (Anna Mine; Annie Lead Mine), U.S. Army Yuma Proving Grounds, Castle Dome Mining District, Castle Dome Mountains, Yuma County, Arizona, USA
36.4km (22.6 miles) ⓘC.O.D. Mine (C.O.D. prospect; C.O.D. group of claims), Red Raven Wash, Ocotillo Mine Group, Yuma County, Arizona, USA
39.6km (24.6 miles) ⓘEngles Mine (Adams Mine; Charles Engles claims), Horn, Neversweat Mining District (Palomas Mountains Mining District), Neversweat Ridge-Palomas Mountains, Yuma County, Arizona, USA
41.4km (25.8 miles) ⓘRuby prospect, U.S. Army Yuma Proving Grounds, Mohawk Mining District, Mohawk Mountains, Yuma County, Arizona, USA
44.7km (27.8 miles) ⓘAlamo Mine, Owl Head, La Paz County, Arizona, USA
48.0km (29.9 miles) ⓘMcPhaul prospect (McPhall prospect), Dome Mining District (Gila City Mining District), Yuma County, Arizona, USA
51.2km (31.8 miles) ⓘRed Cross Mine (Norton Mine), Barry M. Goldwater Air Force Range, Mohawk Mining District, Mohawk Mountains, Yuma County, Arizona, USA
51.5km (32.0 miles) ⓘChloride-Mandarin-Cash Entry prospects, U.S. Army Yuma Proving Grounds, Silver Mining District, La Paz County, Arizona, USA
References
Wilson, E.D. (1933), AZ Bur. Mines Bull. 134: 104-105.
 
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