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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Boleite from
The Gannel Smelter slag locality, Crantock, Cornwall, England, UK


06497410017364180369774.jpg
Boleite

The Gannel Smelter slag locality, Crantock, Cornwall, England, UK
06497410017364180369774.jpg
Boleite

The Gannel Smelter slag locality, Crantock, Cornwall, England, UK
03882260017271998565001.jpg
Boleite

The Gannel Smelter slag locality, Crantock, Cornwall, England, UK
Locality type:Slag Locality
Classification
Species:Boleite
Formula:KPb26Ag9Cu24(OH)48Cl62
Formation:Post-mining/Anthropogenic
Comments:No analyses given; crystal habit suggests pseudoboleite (comment Uwe Kolitsch June 2018).
Confirmation
Validity:Unconfirmed/Questioned
Data
Mineral Data:Click here to view Boleite data
Locality Data:Click here to view The Gannel Smelter slag locality, Crantock, Cornwall, England, UK
Data Identifiers
Mindat Occurrence Record ID:45879
Long-form Identifier:1:3:45879:3
GUID (UUID V4):0
Nearest other occurrences of Boleite
2.7km (1.7 miles) ⓘTolcarne Beach, Newquay, Cornwall, England, UK
18.9km (11.7 miles) ⓘSouthern Merop Island, Gunver Head, Padstow, Cornwall, England, UK
19.0km (11.8 miles) ⓘCuddrabridge Mine (Guddrabridge Mine; Padstow Consols; Trevone Consols; Wheal Galway), Gunver Head, Padstow, Cornwall, England, UK
20.6km (12.8 miles) ⓘNorth Porthilly Mine (New Treburgett Mine), Rock, St Minver, Cornwall, England, UK
30.9km (19.2 miles) ⓘNewporth Beach, Falmouth, Cornwall, England, UK
39.2km (24.4 miles) ⓘWheal Penrose, Porthleven, Cornwall, England, UK
39.5km (24.6 miles) ⓘWheal Rose (Wheal Lomax), Porthleven, Cornwall, England, UK
References
BMS Newsletter 79, March 2010 (http://britishmicromountsociety.homestead.com/Gannell-Smelter.html)
 
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