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
Machen quarry, Machen, Caerphilly, Wales, UK


Locality type:Quarry
Classification
Species:Quartz
Formula:SiO2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Quartz data
Locality Data:Click here to view Machen quarry, Machen, Caerphilly, Wales, UK
Data Identifiers
Mindat Occurrence Record ID:35128
Long-form Identifier:1:3:35128:7
GUID (UUID V4):0
Nearest other occurrences of Quartz
1.6km (1.0 miles) ⓘRisca Colliery (Blackvein Colliery), Risca, Caerphilly, Wales, UK
1.9km (1.2 miles) ⓘRhyd-y-Gwern Mine, Draethen, Caerphilly, Wales, UK
2.7km (1.7 miles) ⓘRisca Quarry, Risca, Caerphilly, Wales, UK
4.9km (3.1 miles) ⓘBedwas Colliery, Bedwas, Caerphilly, Wales, UK
10.3km (6.4 miles) ⓘOakdale Colliery, Oakdale, Caerphilly, Wales, UK
10.9km (6.8 miles) ⓘWindsor Colliery, Abertridwr, Caerphilly, Wales, UK
12.6km (7.9 miles) ⓘTaff's Well Quarry, Pentyrch, Cardiff, Wales, UK
13.1km (8.2 miles) ⓘBlaenserchan Colliery, Abersychan, Torfaen, Wales, UK
13.2km (8.2 miles) ⓘTon Mawr Quarry, Pentyrch, Cardiff, Wales, UK
14.0km (8.7 miles) ⓘMarkham Colliery, Markham, Caerphilly, Wales, UK
References
Plant, S.P., Jones, I.E. (1996) Minerals of Machen quarry, Mid Glamorgan, Wales. Journal of the Russell Society, 6 (1) 31-36
 
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