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


Locality type:Mine
Classification
Species:Ankerite
Formula:Ca(Fe2+,Mg)(CO3)2
Formation:Primary
Comments:Needs quantitative EDX to confirm elements present.
Confirmation
Validity:Confirmed
Confirmation Methods:XRD
Associated Minerals Based on Photo Data:
Alunite Group1
Native Bismuth1
Chalcopyrite1
Erythrite1
Malachite1
Bismutite1
Goethite1
Cassiterite1
Carminite1
Data
Mineral Data:Click here to view Ankerite data
Locality Data:Click here to view Penberthy Croft Mine, St Hilary, Cornwall, England, UK
Data Identifiers
Mindat Occurrence Record ID:19219
Long-form Identifier:1:3:19219:8
GUID (UUID V4):0
Nearest other occurrences of Ankerite
16.2km (10.1 miles) ⓘWheal Uny, Redruth, Cornwall, England, UK
24.0km (14.9 miles) ⓘEastern Cliff, Kennack Cove (Kennack Sands), Kennack, Grade-Ruan, Cornwall, England, UK
63.4km (39.4 miles) ⓘPort Quin Mine, Port Quin, St Minver, Cornwall, England, UK
64.3km (39.9 miles) ⓘReedy Cliff, Beach and Cliff exposures, Port Quin, St Endellion, Cornwall, England, UK
64.3km (40.0 miles) ⓘTrevinnick Mine, St Kew, Cornwall, England, UK
65.2km (40.5 miles) ⓘTresungers Mine (Rose Mine; Wheal Arthur), Port Isaac, St Endellion, Cornwall, England, UK
65.4km (40.6 miles) ⓘWheal Boys (Trewetha Mine; Old Trewetha Mine), Port Isaac, St Endellion, Cornwall, England, UK
65.5km (40.7 miles) ⓘPoltreworgey Mine, St Endellion, Cornwall, England, UK
66.4km (41.3 miles) ⓘTreore Mine, St Endellion, Cornwall, England, UK
67.5km (41.9 miles) ⓘBounds Cliff, St Endellion, Cornwall, England, UK
References
Betterton, J. (2000) Famous Mineral Localities: Penberthy Croft Mine, St. Hilary, Cornwall, England. UK Journal of Mines and Minerals 20, Rockbottom Publications. 7-37
 
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