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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Quartz from
North Roskear, Camborne, Cornwall, England, UK


00434890017363262649886.jpg
Chalcedony

North Roskear, Camborne, Cornwall, England, UK
00434890017363262649886.jpg
Chalcedony

North Roskear, Camborne, Cornwall, England, UK
03067670017272044955272.jpg
Chalcedony

North Roskear, Camborne, Cornwall, England, UK
Locality type:Mine
Classification
Species:Quartz
Formula:SiO2
Confirmation
Validity:Confirmed
Confirmation Methods:Visually Identified
Data
Mineral Data:Click here to view Quartz data
Locality Data:Click here to view North Roskear, Camborne, Cornwall, England, UK
Data Identifiers
Mindat Occurrence Record ID:1007724
Long-form Identifier:1:3:1007724:1
GUID (UUID V4):0
Localities for Quartz in this Region
North Roskear Mine, North Roskear, Camborne, Cornwall, England, UK
Wheal Crofty (Old Wheal Crofty; incl. Wheal Knight; Wheal Vernon), North Roskear, Camborne, Cornwall, England, UK
Wheal Seton, North Roskear, Camborne, Cornwall, England, UK
Nearest other occurrences of Quartz
0.1km (0.1 miles) ⓘNew Roskear Shaft, Dolcoath Mine, Camborne, Cornwall, England, UK
0.2km (0.1 miles) ⓘNorth Roskear Mine, North Roskear, Camborne, Cornwall, England, UK
0.2km (0.1 miles) ⓘSouth Roskear Mine, South Roskear group (Pendarves Consols), Camborne, Cornwall, England, UK
0.4km (0.2 miles) ⓘWheal Crofty (Old Wheal Crofty; incl. Wheal Knight; Wheal Vernon), North Roskear, Camborne, Cornwall, England, UK
0.5km (0.3 miles) ⓘWheal Seton, North Roskear, Camborne, Cornwall, England, UK
0.7km (0.4 miles) ⓘLongclose Mine, Pool, Carn Brea, Cornwall, England, UK
0.7km (0.4 miles) ⓘWest Wheal Seton, Camborne, Cornwall, England, UK
0.8km (0.5 miles) ⓘEast Wheal Seton, Tolvaddon, Illogan, Cornwall, England, UK
0.8km (0.5 miles) ⓘNorth Wheal Crofty, Pool, Carn Brea, Cornwall, England, UK
0.8km (0.5 miles) ⓘDolcoath Mine, Camborne, Cornwall, England, UK
References
De Bondt, Paul (n.d.) Personal communication.
 
and/or  
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