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
Gelli Colliery (Globe), Gelli, Rhondda Cynon Taf, Wales, UK


08088070017369071904668.jpg
Quartz

Gelli Colliery, Gelli, Rhondda Cynon Taf, Wales, UK
00944190017272030415154.jpg
Quartz, etc.

Gelli Colliery, Gelli, Rhondda Cynon Taf, Wales, UK
07051910017272035334773.jpg
Quartz

Gelli Colliery, Gelli, Rhondda Cynon Taf, Wales, UK
00944190017272030415154.jpg
Quartz, etc.

Gelli Colliery, Gelli, Rhondda Cynon Taf, Wales, UK
07051910017272035334773.jpg
Quartz

Gelli Colliery, Gelli, Rhondda Cynon Taf, Wales, UK
00944190017272030415154.jpg
Quartz, etc.

Gelli Colliery, Gelli, Rhondda Cynon Taf, Wales, UK
Locality type:Colliery
Classification
Species:Quartz
Formula:SiO2
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Chalcopyrite1
Data
Mineral Data:Click here to view Quartz data
Locality Data:Click here to view Gelli Colliery (Globe), Gelli, Rhondda Cynon Taf, Wales, UK
Photo GalleryView Gallery (2 photos)
Data Identifiers
Mindat Occurrence Record ID:68169
Long-form Identifier:1:3:68169:2
GUID (UUID V4):0
Nearest other occurrences of Quartz
2.4km (1.5 miles) ⓘCambrian Colliery, Clydach Vale, Rhondda Cynon Taf, Wales, UK
3.4km (2.1 miles) ⓘFerndale Pits (Blaenllechau Colliery), Tylorstown, Rhondda Cynon Taf, Wales, UK
3.5km (2.2 miles) ⓘDare Colliery, Cwmparc, Rhondda Cynon Taf, Wales, UK
6.2km (3.8 miles) ⓘHafod Pit (Colliery), Trehafod, Rhondda Cynon Taf, Wales, UK
8.6km (5.3 miles) ⓘInternational Colliery, Blaengarw, Bridgend, Wales, UK
9.1km (5.6 miles) ⓘCoed-Ely Colliery, Coed Ely, Rhondda Cynon Taf, Wales, UK
14.2km (8.9 miles) ⓘWindsor Colliery, Abertridwr, Caerphilly, Wales, UK
14.8km (9.2 miles) ⓘMwyndy Mine, Llantrisant, Rhondda Cynon Taf, Wales, UK
15.0km (9.3 miles) ⓘLlwyn-saer Mine, Llantrisant, Rhondda Cynon Taf, Wales, UK
16.3km (10.1 miles) ⓘCregiau Quarry, Pentyrch, Cardiff, Wales, UK
References
Ian Jones Collection. Siegenite, dolomite and dickite confirmed by XRD at the National Museum of Wales
 
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