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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Riebeckite from
Hardwick Quarry, Quincy, Norfolk County, Massachusetts, USA


Locality type:Quarry
Classification
Species:Riebeckite
Formula:◻Na2(Fe32+Fe23+)Si8O22(OH)2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Riebeckite data
Locality Data:Click here to view Hardwick Quarry, Quincy, Norfolk County, Massachusetts, USA
Data Identifiers
Mindat Occurrence Record ID:280575
Long-form Identifier:1:3:280575:7
GUID (UUID V4):0
Nearest other occurrences of Riebeckite
0.1km (0.1 miles) ⓘMcKenzie & Patterson Quarry, Quincy, Norfolk County, Massachusetts, USA
0.4km (0.3 miles) ⓘField & Wild Quarry, Quincy, Norfolk County, Massachusetts, USA
0.5km (0.3 miles) ⓘFallon Brothers Quarry, Quincy, Norfolk County, Massachusetts, USA
0.7km (0.4 miles) ⓘMerry Mount Quarry, Quincy, Norfolk County, Massachusetts, USA
1.5km (0.9 miles) ⓘJ. S. Swingle Quarry (Swingle's Quarry), Quincy, Norfolk County, Massachusetts, USA
1.6km (1.0 miles) ⓘGranite Railway Quarry (Granite Rail Quarry), Quincy, Norfolk County, Massachusetts, USA
1.7km (1.0 miles) ⓘBunker Hill Quarry, Quincy, Norfolk County, Massachusetts, USA
1.7km (1.1 miles) ⓘLittle Granite Railway Quarry, Quincy, Norfolk County, Massachusetts, USA
2.6km (1.6 miles) ⓘCashman Quarry, Quincy, Norfolk County, Massachusetts, USA
3.0km (1.8 miles) ⓘGold Leaf Quarry, Quincy, Norfolk County, Massachusetts, USA
References
Dale, 1908. The Commercial Granites of MA, NH, and RI
 
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