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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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Crocidolite from
Dales Gorge, Wittenoom, Ashburton Shire, Western Australia, Australia


07349810017272031654787.jpg
Crocidolite

Dales Gorge, Wittenoom, Ashburton Shire, Western Australia, Australia
07349810017272031654787.jpg
Crocidolite

Dales Gorge, Wittenoom, Ashburton Shire, Western Australia, Australia
05582020017362302788814.jpg
Crocidolite

Dales Gorge, Wittenoom, Ashburton Shire, Western Australia, Australia
Locality type:Gorge
Classification
Species:Riebeckite Root Name Group var: Crocidolite
Formula:◻[Na2][Z32+Fe23+]Si8O22(OH,F,Cl)2
Confirmation
Validity:Unconfirmed/Questioned
Data
Mineral Data:Click here to view Crocidolite data
Locality Data:Click here to view Dales Gorge, Wittenoom, Ashburton Shire, Western Australia, Australia
Data Identifiers
Mindat Occurrence Record ID:101239
Long-form Identifier:1:3:101239:2
GUID (UUID V4):0
Nearest other occurrences of Crocidolite
13.6km (8.5 miles) ⓘYampire Gorge Mine, Yampire Gorge, Wittenoom, Ashburton Shire, Western Australia, Australia
14.4km (8.9 miles) ⓘYampire Gorge, Wittenoom, Ashburton Shire, Western Australia, Australia
31.0km (19.3 miles) ⓘColonial Mine, Wittenoom Gorge, Wittenoom, Ashburton Shire, Western Australia, Australia
31.1km (19.3 miles) ⓘWittenoom Gorge Mine, Wittenoom Gorge, Wittenoom, Ashburton Shire, Western Australia, Australia
35.4km (22.0 miles) ⓘWittenoom, Ashburton Shire, Western Australia, Australia
64.1km (39.8 miles) ⓘArea C mine, Mining Area C, Weeli Wolli Creek Area, East Pilbara Shire, Western Australia, Australia
References
Ayres, D. E. (1972) Genesis of Iron-bearing Minerals in Banded Iron Formation Mesobands in The Dales Gorge Member, Hamersley Group, Western Australia. Economic Geology, 67 (8) 1214-1233 doi:10.2113/gsecongeo.67.8.1214
Miyano, T., Miyano, S. (1982) Ferri-annite from the Dales Gorge Member iron-formations, Wittenoom area, Western Australia. American Mineralogist, 67 (11-12) 1179-1194
 
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