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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Smectite Group from
Placerville Mining District, Lower San Miguel Mining District, San Miguel County, Colorado, USA


Locality type:Mining District
Classification
Species:'Smectite Group' (not an IMA approved species)
Formula:A0.3D2-3[T4O10]Z2 · nH2O
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Smectite Group data
Locality Data:Click here to view Placerville Mining District, Lower San Miguel Mining District, San Miguel County, Colorado, USA
Data Identifiers
Mindat Occurrence Record ID:463263
Long-form Identifier:1:3:463263:4
GUID (UUID V4):0
Localities for Smectite Group in this Region
Black King Mine (Black King No. 4; Black King No. 5; Black King No. 5 Claim; Unpatented Claims: Black King No. 1; Evans Claims; Weatherly Claims), Placerville Mining District, Lower San Miguel Mining District, San Miguel County, Colorado, USA
Nearest other occurrences of Smectite Group
2.1km (1.3 miles) ⓘBlack King Mine (Black King No. 4; Black King No. 5; Black King No. 5 Claim; Unpatented Claims: Black King No. 1; Evans Claims; Weatherly Claims), Placerville Mining District, Lower San Miguel Mining District, San Miguel County, Colorado, USA
10.4km (6.5 miles) ⓘCarpenter Mine, Lower San Miguel Mining District, San Miguel County, Colorado, USA
76.8km (47.7 miles) ⓘCougar Mine, San Miguel County, Colorado, USA
98.7km (61.4 miles) ⓘCreede Formation, Creede Mining District, Mineral 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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