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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Calcite from
Britannic Merthyr Colliery, Gilfach Coch, Rhondda Cynon Taf, Wales, UK


Locality type:Colliery
Classification
Species:Calcite
Formula:CaCO3
Comments:Tips now removed and landscaped.
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Galena1
Millerite1
Cerussite1
Data
Mineral Data:Click here to view Calcite data
Locality Data:Click here to view Britannic Merthyr Colliery, Gilfach Coch, Rhondda Cynon Taf, Wales, UK
Data Identifiers
Mindat Occurrence Record ID:68387
Long-form Identifier:1:3:68387:6
GUID (UUID V4):0
Nearest other occurrences of Calcite
5.9km (3.6 miles) ⓘParc Colliery (Park), Cwmparc, Rhondda Cynon Taf, Wales, UK
9.2km (5.7 miles) ⓘLlanilid West Opencast Coalmine, Llanharan, Rhondda Cynon Taf, Wales, UK
10.8km (6.7 miles) ⓘLlanharry Mine, Llanharry, Rhondda Cynon Taf, Wales, UK
11.6km (7.2 miles) ⓘA4119 roadcutting, Llantrisant, Rhondda Cynon Taf, Wales, UK
12.2km (7.6 miles) ⓘRhiwsaeson (Gwern Efa), Llantrisant, Rhondda Cynon Taf, Wales, UK
12.5km (7.8 miles) ⓘHendy Quarry, Llantrisant, Rhondda Cynon Taf, Wales, UK
14.3km (8.9 miles) ⓘCregiau Quarry, Pentyrch, Cardiff, Wales, UK
14.3km (8.9 miles) ⓘWindsor Colliery, Abertridwr, Caerphilly, Wales, UK
16.3km (10.1 miles) ⓘGarth Mine (Little Garth Mine), Pentyrch, Cardiff, Wales, UK
16.4km (10.2 miles) ⓘTon Mawr Quarry, Pentyrch, Cardiff, Wales, UK
References
Ian Jones collection
 
and/or  
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