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
South Range Quarry, South Range, Douglas County, Wisconsin, USA


Locality type:Quarry
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 South Range Quarry, South Range, Douglas County, Wisconsin, USA
Data Identifiers
Mindat Occurrence Record ID:130545
Long-form Identifier:1:3:130545:6
GUID (UUID V4):0
Nearest other occurrences of Prehnite
0.4km (0.3 miles) ⓘJohnson Materials Co. Quarry, Douglas County, Wisconsin, USA
3.0km (1.9 miles) ⓘBuckley Quarry, Amnicon Falls, Douglas County, Wisconsin, USA
5.9km (3.7 miles) ⓘMabel Nelson Road Quarry, Douglas County, Wisconsin, USA
7.5km (4.7 miles) ⓘChippewa Mine, Douglas County, Wisconsin, USA
8.0km (4.9 miles) ⓘFond du Lac copper prospect, Douglas County, Wisconsin, USA
13.4km (8.3 miles) ⓘCopper Creek prospects, Douglas County, Wisconsin, USA
24.7km (15.3 miles) ⓘSolon Springs Quarry, Douglas County, Wisconsin, USA
25.1km (15.6 miles) ⓘPercival copper prospects, Douglas County, Wisconsin, USA
26.5km (16.5 miles) ⓘEly's Peak, Saint Louis County, Minnesota, USA
33.0km (20.5 miles) ⓘTalmadge River, Saint Louis County, Minnesota, USA
References
Cordua, W.S. (1990), Amygdule Minerals of the South Range Quarry, Douglas County, Wisconsin: Rocks and Minerals: 65: 412-415. 

 
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