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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Allophane from
Port Quin Mine, Port Quin, St Minver, Cornwall, England, UK


Locality type:Mine
Classification
Species:Allophane
Formula:(Al2O3)(SiO2)1.3-2 · 2.5-3H2O
Confirmation
Validity:Believed Valid
Associated Minerals:
Associates:Dundasite
Data
Mineral Data:Click here to view Allophane data
Locality Data:Click here to view Port Quin Mine, Port Quin, St Minver, Cornwall, England, UK
Data Identifiers
Mindat Occurrence Record ID:414
Long-form Identifier:1:3:414:9
GUID (UUID V4):0
Nearest other occurrences of Allophane
25.9km (16.1 miles) ⓘNew Fowey Consols, Lanlivery, Cornwall, England, UK
29.6km (18.4 miles) ⓘHawkswood Mine (Hawk's Wood Mine), North Hill, Cornwall, England, UK
30.2km (18.7 miles) ⓘPhoenix United Mine, Minions, Linkinhorne, Cornwall, England, UK
35.1km (21.8 miles) ⓘGarras Mine (Gwarnick Mine; Guarneck Mine), Shortlanesend, Kenwyn, Cornwall, England, UK
47.0km (29.2 miles) ⓘWatson's Mine, Devon Great Consols, Gulworthy, West Devon, Devon, England, UK
49.9km (31.0 miles) ⓘNew East Wheal Russell (South Wheal Crebor), Gulworthy, West Devon, Devon, England, UK
54.0km (33.6 miles) ⓘSouth Mine (Wheal Ann), Devon United Mines, Peter Tavy, West Devon, Devon, England, UK
56.6km (35.2 miles) ⓘBlackchurch cliff, Mouth Mill bay, Clovelly, Torridge, Devon, England, UK
60.6km (37.6 miles) ⓘMeldon Mine, Okehampton Hamlets, West Devon, Devon, England, UK
76.6km (47.6 miles) ⓘWheal Hazard, Botallack Mine, Botallack, St Just, Cornwall, England, UK
References
Palache, Charles; Berman, Harry; Frondel, Clifford (1951) The System of Mineralogy (7th ed.) Vol. 2 - Halides, Nitrates, Borates, Carbonates, Sulfates, Phosphates, Arsenates, Tungstates, Molybdates, Etc. John Wiley and Sons.
Golley, Peter, Williams, Richard (1995) Cornish Mineral Reference Manual. Endsleigh Book Co., Truro. 71pp.
 
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