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
South Crofty Mine, Pool, Carn Brea, Cornwall, England, UK


02435940017271969443812.jpg
Quartz

South Crofty Mine, Pool, Carn Brea, Cornwall, England, UK
01797350017271997318884.jpg
Quartz

South Crofty Mine, Pool, Carn Brea, Cornwall, England, UK
03383940017271997329407.jpg
Quartz

South Crofty Mine, Pool, Carn Brea, Cornwall, England, UK
06993840017272039465039.jpg
Milky Quartz

South Crofty Mine, Pool, Carn Brea, Cornwall, England, UK
02435940017271969443812.jpg
Quartz

South Crofty Mine, Pool, Carn Brea, Cornwall, England, UK
01797350017271997318884.jpg
Quartz

South Crofty Mine, Pool, Carn Brea, Cornwall, England, UK
03383940017271997329407.jpg
Quartz

South Crofty Mine, Pool, Carn Brea, Cornwall, England, UK
06992160017272039466661.jpg
Milky Quartz

South Crofty Mine, Pool, Carn Brea, Cornwall, England, UK
02435940017271969443812.jpg
Quartz

South Crofty Mine, Pool, Carn Brea, Cornwall, England, UK
01797350017271997318884.jpg
Quartz

South Crofty Mine, Pool, Carn Brea, Cornwall, England, UK
03383940017271997329407.jpg
Quartz

South Crofty Mine, Pool, Carn Brea, Cornwall, England, UK
06992160017272039466661.jpg
Milky Quartz

South Crofty Mine, Pool, Carn Brea, Cornwall, England, UK
Locality type:Project
Classification
Species:Quartz
Formula:SiO2
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Cassiterite12
Siderite8
Wolframite Group8
Fluorite8
Pyrite5
Bismuthinite5
Hematite5
- var Specularite3
Chalcopyrite4
Malachite3
Tourmaline3
Arsenopyrite2
Stannite2
Feldspar Group2
Quartz2
- var Chalcedony2
Chlorite Group1
Calcite1
Data
Mineral Data:Click here to view Quartz data
Locality Data:Click here to view South Crofty Mine, Pool, Carn Brea, Cornwall, England, UK
Photo GalleryView Gallery (7 photos)
Data Identifiers
Mindat Occurrence Record ID:17482
Long-form Identifier:1:3:17482:8
GUID (UUID V4):0
Nearest other occurrences of Quartz
0.1km (0.1 miles) ⓘNew Cook's Kitchen Mine, Pool, Carn Brea, Cornwall, England, UK
0.2km (0.1 miles) ⓘLongclose Mine, Pool, Carn Brea, Cornwall, England, UK
0.4km (0.2 miles) ⓘCook's Kitchen Mine, Pool, Carn Brea, Cornwall, England, UK
0.4km (0.2 miles) ⓘNorth Wheal Crofty, Pool, Carn Brea, Cornwall, England, UK
0.5km (0.3 miles) ⓘTincroft Mine, Pool, Carn Brea, Cornwall, England, UK
0.7km (0.4 miles) ⓘDolcoath Mine, Camborne, Cornwall, England, UK
0.7km (0.5 miles) ⓘWheal Crofty (Old Wheal Crofty; incl. Wheal Knight; Wheal Vernon), North Roskear, Camborne, Cornwall, England, UK
0.8km (0.5 miles) ⓘNew Roskear Shaft, Dolcoath Mine, Camborne, Cornwall, England, UK
0.8km (0.5 miles) ⓘNorth Roskear, Camborne, Cornwall, England, UK
0.9km (0.5 miles) ⓘSouth Roskear Mine, South Roskear group (Pendarves Consols), Camborne, Cornwall, England, UK
References
De Bondt, Paul (n.d.) Personal communication.Identification: Visual Identification
Hill, J. B., MacAlister, D. A. (1906) The Geology of Falmouth and Truro and of the Mining District of Camborne and Redruth - Memoirs of the Geological Survey. Geological Survey of Great Britain.
Russell, Arthur (1911) On the occurrence of Phenacite in Cornwall. Mineralogical Magazine and Journal of the Mineralogical Society, 16 (73) 55-62 doi:10.1180/minmag.1911.016.073.08
Dines, H. G. (1956) The Metalliferous Mining Region of South-West England (1st ed.) Vol. 1. Geological Survey of Great Britain, London.pp.317-326
 
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