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
Wheal Penrose, Porthleven, Cornwall, England, UK


07091500017271979739656.jpg
Quartz

Wheal Penrose, Porthleven, Cornwall, England, UK
09275360017272729366098.jpg
Quartz

Wheal Penrose, Porthleven, Cornwall, England, UK
05138550017369732889773.jpg
Quartz

Wheal Penrose, Porthleven, Cornwall, England, UK
07091500017271979739656.jpg
Quartz

Wheal Penrose, Porthleven, Cornwall, England, UK
09275360017272729366098.jpg
Quartz

Wheal Penrose, Porthleven, Cornwall, England, UK
05138550017369732889773.jpg
Quartz

Wheal Penrose, Porthleven, Cornwall, England, UK
07091500017271979739656.jpg
Quartz

Wheal Penrose, Porthleven, Cornwall, England, UK
09512200017369732886700.jpg
Quartz

Wheal Penrose, Porthleven, Cornwall, England, UK
05138550017369732889773.jpg
Quartz

Wheal Penrose, Porthleven, Cornwall, England, UK
Locality type:Mine
Classification
Species:Quartz
Formula:SiO2
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Pyromorphite3
Siderite1
Galena1
Arsenopyrite1
Data
Mineral Data:Click here to view Quartz data
Locality Data:Click here to view Wheal Penrose, Porthleven, Cornwall, England, UK
Photo GalleryView Gallery (2 photos)
Data Identifiers
Mindat Occurrence Record ID:36726
Long-form Identifier:1:3:36726:0
GUID (UUID V4):0
Nearest other occurrences of Quartz
0.7km (0.4 miles) ⓘWheal Rose (Wheal Lomax), Porthleven, Cornwall, England, UK
1.3km (0.8 miles) ⓘLoe Bar, Porthleven, Cornwall, England, UK
3.2km (2.0 miles) ⓘMegiliggar Rocks (Tremearne pegmatite), Breage, Cornwall, England, UK
3.7km (2.3 miles) ⓘWheal Trewavas (Trewavas Cliff Mine), Rinsey, Breage, Cornwall, England, UK
3.8km (2.4 miles) ⓘGreat Wheal Fortune, Breage, Cornwall, England, UK
4.9km (3.0 miles) ⓘRinsey Head, Rinsey, Breage, Cornwall, England, UK
5.2km (3.2 miles) ⓘWheal Vor (Great Wheal Vor), Carleen, Breage, Cornwall, England, UK
6.0km (3.7 miles) ⓘTregonning Hill, Breage, Cornwall, England, UK
6.0km (3.7 miles) ⓘRoselidden mine, Wendron, Cornwall, England, UK
6.4km (3.9 miles) ⓘLady Gwendolen Mine, Germoe, Cornwall, England, UK
References
Royal Cornwall Polytechnic Society (1870): 38. Annual Report, pp. 30-31
 
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