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
Penberthy Croft Mine, St Hilary, Cornwall, England, UK


06457290017272036222270.jpg
Dolomite

Penberthy Croft Mine, St Hilary, Cornwall, England, UK
06299460017392184437681.jpg
Dolomite

Penberthy Croft Mine, St Hilary, Cornwall, England, UK
09182520017366220343977.jpg
Dolomite, etc.

Penberthy Croft Mine, St Hilary, Cornwall, England, UK
09826360017730431805674.jpg
Dolomite, etc.

Penberthy Croft Mine, St Hilary, Cornwall, England, UK
06457290017272036222270.jpg
Dolomite

Penberthy Croft Mine, St Hilary, Cornwall, England, UK
03697740017272045056232.jpg
Dolomite

Penberthy Croft Mine, St Hilary, Cornwall, England, UK
07642020017272045058265.jpg
Dolomite, etc.

Penberthy Croft Mine, St Hilary, Cornwall, England, UK
04819860017730430929089.jpg
Dolomite, etc.

Penberthy Croft Mine, St Hilary, Cornwall, England, UK
06457290017272036222270.jpg
Dolomite

Penberthy Croft Mine, St Hilary, Cornwall, England, UK
02464620017272000755601.jpg
Dolomite

Penberthy Croft Mine, St Hilary, Cornwall, England, UK
07006030017272000763712.jpg
Dolomite, etc.

Penberthy Croft Mine, St Hilary, Cornwall, England, UK
07940190017730471084467.jpg
Dolomite, etc.

Penberthy Croft Mine, St Hilary, Cornwall, England, UK
Locality type:Mine
Classification
Species:Dolomite
Formula:CaMg(CO3)2
Confirmation
Validity:Confirmed
Confirmation Methods:XRD
Confirmation Details:Where Tested and Reference ID: NHM London XRD
Associated Minerals Based on Photo Data:
Chalcoalumite6
Birnessite6
Devilline4
Malachite3
Brochantite2
Clinochlore2
Bismuthinite2
Quartz2
Langite1
Connellite1
Native Bismuth1
Chlorite Group1
Parnauite1
Goethite1
Erythrite1
Siderite1
Pyrite1
Data
Mineral Data:Click here to view Dolomite data
Locality Data:Click here to view Penberthy Croft Mine, St Hilary, Cornwall, England, UK
Photo GalleryView Gallery (4 photos)
Data Identifiers
Mindat Occurrence Record ID:19221
Long-form Identifier:1:3:19221:3
GUID (UUID V4):0
Nearest other occurrences of Dolomite
0.6km (0.4 miles) ⓘEnnys Wheal Virgin, St Hilary, Cornwall, England, UK
1.0km (0.7 miles) ⓘTrevarthian Downs Mine (Trevarthen Mine), St Hilary, Cornwall, England, UK
6.0km (3.7 miles) ⓘBinner Downs Mine, Leedstown, Crowan, Cornwall, England, UK
7.3km (4.5 miles) ⓘWheal Vor (Great Wheal Vor), Carleen, Breage, Cornwall, England, UK
7.3km (4.6 miles) ⓘNew Rosewarne Mine, Rosewarne United Mines, Gwinear-Gwithian, Cornwall, England, UK
7.9km (4.9 miles) ⓘTrevascus Mine (Trevaskus Mine; Trevaskis Mine), Carnhell Green, Gwinear-Gwithian, Cornwall, England, UK
8.8km (5.5 miles) ⓘSt Ives Consols (incl. Wellesley Mine; Wheal Mary), St Ives, Cornwall, England, UK
11.4km (7.1 miles) ⓘWheal Rose (Wheal Lomax), Porthleven, Cornwall, England, UK
13.2km (8.2 miles) ⓘDolcoath Mine, Camborne, Cornwall, England, UK
13.3km (8.3 miles) ⓘNorth Roskear Mine, North Roskear, Camborne, Cornwall, England, UK
References
 
and/or  
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