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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Dolomite from
Deep Navigation Colliery, Treharris, Merthyr Tydfil, Wales, UK


Locality type:Colliery
Classification
Species:Dolomite
Formula:CaMg(CO3)2
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Millerite1
Galena1
Data
Mineral Data:Click here to view Dolomite data
Locality Data:Click here to view Deep Navigation Colliery, Treharris, Merthyr Tydfil, Wales, UK
Data Identifiers
Mindat Occurrence Record ID:82046
Long-form Identifier:1:3:82046:8
GUID (UUID V4):0
Nearest other occurrences of Dolomite
3.6km (2.2 miles) ⓘAbercynon Colliery (Dowlais Cardiff), Abercynon, Rhondda Cynon Taf, Wales, UK
5.8km (3.6 miles) ⓘBargoed Colliery, Bargoed, Caerphilly, Wales, UK
8.8km (5.5 miles) ⓘFerndale Pits (Blaenllechau Colliery), Tylorstown, Rhondda Cynon Taf, Wales, UK
11.0km (6.8 miles) ⓘBedwas Colliery, Bedwas, Caerphilly, Wales, UK
12.0km (7.5 miles) ⓘGelli Colliery (Globe), Gelli, Rhondda Cynon Taf, Wales, UK
13.5km (8.4 miles) ⓘVaynor Quarry, Trefechan, Merthyr Tydfil, Wales, UK
14.3km (8.9 miles) ⓘCoed-Ely Colliery, Coed Ely, Rhondda Cynon Taf, Wales, UK
15.0km (9.3 miles) ⓘMaen Llwyd, Caerphilly, Wales, UK
15.1km (9.4 miles) ⓘMachen quarry, Machen, Caerphilly, Wales, UK
15.3km (9.5 miles) ⓘTon Mawr Quarry, Pentyrch, Cardiff, Wales, UK
References
Ian Jones or national Museum of Wales collections
 
and/or  
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