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
Etta Mine, Keystone, Keystone Mining District, Pennington County, South Dakota, USA


Locality type:Mine
Classification
Species:Malachite
Formula:Cu2(CO3)(OH)2
Comments:Occurs in a lithia pegmatite.
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Malachite data
Locality Data:Click here to view Etta Mine, Keystone, Keystone Mining District, Pennington County, South Dakota, USA
Data Identifiers
Mindat Occurrence Record ID:64577
Long-form Identifier:1:3:64577:9
GUID (UUID V4):0
Nearest other occurrences of Malachite
1.1km (0.7 miles) ⓘWhite Cap Mine, Keystone, Keystone Mining District, Pennington County, South Dakota, USA
1.1km (0.7 miles) ⓘPeerless Mine, Keystone, Keystone Mining District, Pennington County, South Dakota, USA
3.3km (2.0 miles) ⓘQueen Claim, Keystone Mining District, Pennington County, South Dakota, USA
8.6km (5.4 miles) ⓘDakota Calumet Mine (Continental Copper Company Mine), Blue Lead Mine (Mahoney Bluelead Mine), Sheridan, Hill City Mining District, Pennington County, South Dakota, USA
10.0km (6.2 miles) ⓘBlue Lead Mine (Mahoney Bluelead Mine), Sheridan, Hill City Mining District, Pennington County, South Dakota, USA
19.8km (12.3 miles) ⓘQueen Mine, Custer County, South Dakota, USA
22.4km (13.9 miles) ⓘCopper Glance (Uranium Lode; Poisoned Ox Group), Pactola Mining District, Pennington County, South Dakota, USA
22.4km (13.9 miles) ⓘPoisoned Ox Group (Uranium Lode; Copper Glance), Pactola Mining District, Pennington County, South Dakota, USA
28.4km (17.6 miles) ⓘTin Mountain Mine, Fourmile, Custer Mining District, Custer County, South Dakota, USA
35.5km (22.1 miles) ⓘNemo, Lawrence County, South Dakota, USA
References
Rocks & Minerals: 57: 160 &/or 60: 110 & 112.
(2005) Mineral Resources Data System (MRDS), US Geological Survey.
 
and/or  
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