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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Perthite from
Rattlesnake Hill, Sharon, Norfolk County, Massachusetts, USA


Locality type:Hill
Classification
Species:Feldspar Group var: Perthite
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Perthite data
Locality Data:Click here to view Rattlesnake Hill, Sharon, Norfolk County, Massachusetts, USA
Data Identifiers
Mindat Occurrence Record ID:678448
Long-form Identifier:1:3:678448:5
GUID (UUID V4):0
Nearest other occurrences of Perthite
25.1km (15.6 miles) ⓘGrants Mills, Cumberland, Providence County, Rhode Island, USA
40.9km (25.4 miles) ⓘSmithfield beryl prospect, Smithfield, Providence County, Rhode Island, USA
45.7km (28.4 miles) ⓘBeattie & Wilcox Quarry, Fall River, Bristol County, Massachusetts, USA
47.4km (29.5 miles) ⓘDen Granite Quarry, Lynn, Essex County, Massachusetts, USA
47.4km (29.5 miles) ⓘKallenberg Quarry (Robin Rock Quarry; Jordan Quarry), Lynnfield, Essex County, Massachusetts, USA
52.2km (32.4 miles) ⓘBristol Ferry, Portsmouth, Newport County, Rhode Island, USA
56.1km (34.8 miles) ⓘFort Point, Fairhaven, Bristol County, Massachusetts, USA
76.0km (47.2 miles) ⓘWest Kingston, South Kingstown, Washington County, Rhode Island, USA
76.9km (47.8 miles) ⓘRollstone Hill Quarries, Fitchburg, Worcester County, Massachusetts, USA
References
Whitehead, Walter L. (1913): The Geology of the Rattlesnake Hill Granite of Sharon, Massachusetts (Massachusetts Institute of Technology. Dept. of Mining Engineering and Metallurgy).
 
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