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


Locality type:Colliery
Classification
Species:Dickite
Formula:Al2(Si2O5)(OH)4
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Dickite data
Locality Data:Click here to view Deep Navigation Colliery, Treharris, Merthyr Tydfil, Wales, UK
Data Identifiers
Mindat Occurrence Record ID:70376
Long-form Identifier:1:3:70376:3
GUID (UUID V4):0
Nearest other occurrences of Dickite
8.2km (5.1 miles) ⓘLlanbradach Colliery, Llanbradach, Caerphilly, Wales, UK
8.8km (5.5 miles) ⓘFerndale Pits (Blaenllechau Colliery), Tylorstown, Rhondda Cynon Taf, Wales, UK
9.2km (5.7 miles) ⓘCwmneol Colliery (Morris's pit), Cwmaman, Rhondda Cynon Taf, Wales, UK
12.0km (7.5 miles) ⓘGelli Colliery (Globe), Gelli, Rhondda Cynon Taf, Wales, UK
14.0km (8.7 miles) ⓘCambrian Colliery, Clydach Vale, Rhondda Cynon Taf, Wales, UK
27.5km (17.1 miles) ⓘPark Slip West (Margam Opencast), Cefn Cribwr, Bridgend, Wales, UK
30.5km (19.0 miles) ⓘNant Helen opencast coal mine, Onllwyn, Neath Port Talbot, Wales, UK
34.8km (21.6 miles) ⓘMargam Pit, Margam Moors, Neath Port Talbot, Wales, UK
99.4km (61.8 miles) ⓘDylife Mine (Pen Dylife Mine; Esgairgaled Mine; Llechwedd Ddu Mine; Blaen Twymyn Mine), Dylife, Machynlleth, Powys, Wales, UK
References
Ian Jones collection
 
and/or  
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