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


Locality type:Mine
Classification
Species:Natanite
Formula:Fe2+[Sn(OH)6]
Formation:Secondary
Comments:Intergrown with Jeanbandyite recorded by John Betterton (1998)
Quality for species:Good crystals or rich for species - important (!)
Significance:Unusual or interesting association, relationships with other species, pseudomorphism etc. - see notes.
Abundance at site:Very Rare
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Quartz2
Jeanbandyite2
Clinochlore2
Arsenopyrite1
Data
Mineral Data:Click here to view Natanite data
Locality Data:Click here to view Penberthy Croft Mine, St Hilary, Cornwall, England, UK
Data Identifiers
Mindat Occurrence Record ID:20235
Long-form Identifier:1:3:20235:2
GUID (UUID V4):0
Nearest other occurrences of Natanite
9.7km (6.0 miles) ⓘPenlee Beach, Newlyn, Penzance, Cornwall, England, UK
9.8km (6.1 miles) ⓘPenlee Quarry, Newlyn, Penzance, Cornwall, England, UK
93.9km (58.3 miles) ⓘHingston Down Quarry, Gunnislake, Calstock, Cornwall, England, UK
References
Betterton, J., Green, D. I., Jewson, C., Spratt, J., Tandy, P. (1998) The composition and structure of jeanbandyite and natanite. Mineralogical Magazine, 62 (5) 707-712 doi:10.1180/002646198547945
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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