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
Ferndale Pits (Blaenllechau Colliery), Tylorstown, Rhondda Cynon Taf, Wales, UK


Locality type:Pit
Classification
Species:Quartz
Formula:SiO2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Quartz data
Locality Data:Click here to view Ferndale Pits (Blaenllechau Colliery), Tylorstown, Rhondda Cynon Taf, Wales, UK
Data Identifiers
Mindat Occurrence Record ID:68162
Long-form Identifier:1:3:68162:9
GUID (UUID V4):0
Nearest other occurrences of Quartz
3.4km (2.1 miles) ⓘGelli Colliery (Globe), Gelli, Rhondda Cynon Taf, Wales, UK
5.2km (3.2 miles) ⓘHafod Pit (Colliery), Trehafod, Rhondda Cynon Taf, Wales, UK
5.6km (3.5 miles) ⓘCambrian Colliery, Clydach Vale, Rhondda Cynon Taf, Wales, UK
6.2km (3.9 miles) ⓘDare Colliery, Cwmparc, Rhondda Cynon Taf, Wales, UK
10.0km (6.2 miles) ⓘCoed-Ely Colliery, Coed Ely, Rhondda Cynon Taf, Wales, UK
11.8km (7.3 miles) ⓘInternational Colliery, Blaengarw, Bridgend, Wales, UK
12.2km (7.6 miles) ⓘWindsor Colliery, Abertridwr, Caerphilly, Wales, UK
14.9km (9.3 miles) ⓘMwyndy Mine, Llantrisant, Rhondda Cynon Taf, Wales, UK
15.0km (9.3 miles) ⓘLlwyn-saer Mine, Llantrisant, Rhondda Cynon Taf, Wales, UK
15.8km (9.8 miles) ⓘCregiau Quarry, Pentyrch, Cardiff, Wales, UK
References
Ian Jones collection
 
and/or  
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