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
Markham Colliery, Markham, Caerphilly, Wales, UK


Locality type:Colliery
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 Markham Colliery, Markham, Caerphilly, Wales, UK
Data Identifiers
Mindat Occurrence Record ID:1013801
Long-form Identifier:1:3:1013801:0
GUID (UUID V4):0
Nearest other occurrences of Quartz
3.2km (2.0 miles) ⓘMarine Colliery, Cwm, Blaenau Gwent, Wales, UK
4.0km (2.5 miles) ⓘOakdale Colliery, Oakdale, Caerphilly, Wales, UK
4.0km (2.5 miles) ⓘBedwellty Pits, Tredegar, Blaenau Gwent, Wales, UK
8.4km (5.2 miles) ⓘBlaenserchan Colliery, Abersychan, Torfaen, Wales, UK
9.7km (6.0 miles) ⓘPrincetown, Caerphilly, Wales, UK
12.3km (7.6 miles) ⓘBedwas Colliery, Bedwas, Caerphilly, Wales, UK
12.5km (7.7 miles) ⓘRisca Quarry, Risca, Caerphilly, Wales, UK
12.6km (7.8 miles) ⓘRisca Colliery (Blackvein Colliery), Risca, Caerphilly, Wales, UK
13.0km (8.1 miles) ⓘWindsor Colliery, Abertridwr, Caerphilly, Wales, UK
14.0km (8.7 miles) ⓘMachen quarry, Machen, Caerphilly, Wales, UK
References
J.Ralph, collected 1995
 
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