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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Ankerite from
Nant Helen opencast coal mine, Onllwyn, Neath Port Talbot, Wales, UK


05814750017272034468168.jpg
Ankerite, etc.

Nant Helen opencast coal mine, Onllwyn, Neath Port Talbot, Wales, UK
05190320017272024284310.jpg
Ankerite, etc.

Nant Helen opencast coal mine, Onllwyn, Neath Port Talbot, Wales, UK
01135520017667505983195.jpg
Ankerite, etc.

Nant Helen opencast coal mine, Onllwyn, Neath Port Talbot, Wales, UK
01929930017272024334461.jpg
Ankerite, etc.

Nant Helen opencast coal mine, Onllwyn, Neath Port Talbot, Wales, UK
00676250017365661427487.jpg
Ankerite, etc.

Nant Helen opencast coal mine, Onllwyn, Neath Port Talbot, Wales, UK
01991070017365661425834.jpg
Ankerite, etc.

Nant Helen opencast coal mine, Onllwyn, Neath Port Talbot, Wales, UK
01135520017667505983195.jpg
Ankerite, etc.

Nant Helen opencast coal mine, Onllwyn, Neath Port Talbot, Wales, UK
08103030017365661429159.jpg
Ankerite, etc.

Nant Helen opencast coal mine, Onllwyn, Neath Port Talbot, Wales, UK
05814750017272034468168.jpg
Ankerite, etc.

Nant Helen opencast coal mine, Onllwyn, Neath Port Talbot, Wales, UK
05190320017272024284310.jpg
Ankerite, etc.

Nant Helen opencast coal mine, Onllwyn, Neath Port Talbot, Wales, UK
09730300017669158387202.jpg
Ankerite, etc.

Nant Helen opencast coal mine, Onllwyn, Neath Port Talbot, Wales, UK
01929930017272024334461.jpg
Ankerite, etc.

Nant Helen opencast coal mine, Onllwyn, Neath Port Talbot, Wales, UK
Locality type:Open-Cast Mine
Classification
Species:Ankerite
Formula:Ca(Fe2+,Mg)(CO3)2
Comments:Xls to 1.5cms
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Quartz45
Chalcopyrite36
Calcite3
Siegenite3
Millerite1
Data
Mineral Data:Click here to view Ankerite data
Locality Data:Click here to view Nant Helen opencast coal mine, Onllwyn, Neath Port Talbot, Wales, UK
Photo GalleryView Gallery (7 photos)
Data Identifiers
Mindat Occurrence Record ID:39204
Long-form Identifier:1:3:39204:4
GUID (UUID V4):0
Nearest other occurrences of Ankerite
10.1km (6.3 miles) ⓘGlyn Gwilym Isaf Opencast, Clyne and Melincourt, Neath Port Talbot, Wales, UK
19.2km (12.0 miles) ⓘInternational Colliery, Blaengarw, Bridgend, Wales, UK
20.8km (12.9 miles) ⓘFforchaman Colliery, Cwmaman, Rhondda Cynon Taf, Wales, UK
25.6km (15.9 miles) ⓘMargam Pit, Margam Moors, Neath Port Talbot, Wales, UK
30.5km (19.0 miles) ⓘDeep Navigation Colliery, Treharris, Merthyr Tydfil, Wales, UK
34.4km (21.4 miles) ⓘBargoed Colliery, Bargoed, Caerphilly, Wales, UK
48.8km (30.3 miles) ⓘDalrhiw, Rhayader, Powys, Wales, UK
50.9km (31.6 miles) ⓘRhiwnant Mine, Rhayader, Powys, Wales, UK
60.6km (37.7 miles) ⓘForeland Cliffs (incl. Foreland Point), Countisbury, Lynton, North Devon, Devon, England, UK
61.2km (38.0 miles) ⓘCountisbury Beach, Countisbury, Lynton, North Devon, Devon, England, UK
References
National Museum of Wales Mineral Database (EDX analysis T.F. Cotterell, unpublished data)
 
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