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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Prehnite from
Mudge prospect, Washburn County, Wisconsin, USA


Locality type:Prospect
Classification
Species:Prehnite
Formula:Ca2Al2Si3O10(OH)2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Prehnite data
Locality Data:Click here to view Mudge prospect, Washburn County, Wisconsin, USA
Data Identifiers
Mindat Occurrence Record ID:243165
Long-form Identifier:1:3:243165:9
GUID (UUID V4):0
Nearest other occurrences of Prehnite
9.3km (5.8 miles) ⓘWeyerhaeuser Copper Mines, Wascott; County No. 1; County No. 2 or Skrupty, County No. 3, Douglas County, Wisconsin, USA
14.8km (9.2 miles) ⓘHighway 27 roadcuts, Bayfield County, Wisconsin, USA
22.8km (14.2 miles) ⓘMontrose copper prospects, Bayfield County, Wisconsin, USA
28.4km (17.6 miles) ⓘSolon Springs Quarry, Douglas County, Wisconsin, USA
50.6km (31.4 miles) ⓘChippewa Mine, Douglas County, Wisconsin, USA
51.5km (32.0 miles) ⓘPercival copper prospects, Douglas County, Wisconsin, USA
53.1km (33.0 miles) ⓘSouth Range Quarry, South Range, Douglas County, Wisconsin, USA
53.3km (33.1 miles) ⓘMabel Nelson Road Quarry, Douglas County, Wisconsin, USA
53.3km (33.1 miles) ⓘJohnson Materials Co. Quarry, Douglas County, Wisconsin, USA
53.4km (33.2 miles) ⓘBuckley Quarry, Amnicon Falls, Douglas County, Wisconsin, USA
References
Dutton, C. E. (1972) Sampling of Copper-bearing Keweenawan Rocks of Northwestern Wisconsin: U.S. Geological Survey Open File Report 9.1267, 13p.
 
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