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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Sillimanite from
Gumeracha Quarry, Gumeracha, Adelaide Hills Council, South Australia, Australia


Locality type:Quarry
Classification
Species:Sillimanite
Formula:Al2(SiO4)O
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Sillimanite data
Locality Data:Click here to view Gumeracha Quarry, Gumeracha, Adelaide Hills Council, South Australia, Australia
Data Identifiers
Mindat Occurrence Record ID:959999
Long-form Identifier:1:3:959999:4
GUID (UUID V4):0
Nearest other occurrences of Sillimanite
11.9km (7.4 miles) ⓘStockyard Gully Mines, City of Playford, South Australia, Australia
13.9km (8.6 miles) ⓘAustralian Industrial Minerals mine, Williamstown, Barossa Council, South Australia, Australia
20.8km (12.9 miles) ⓘBrukunga Quarry, District Council of Mount Barker, South Australia, Australia
30.8km (19.2 miles) ⓘMannum Falls, Reedy Creek, Mannum, Mid Murray Council, South Australia, Australia
48.4km (30.1 miles) ⓘAngas Mine, Strathalbyn, Alexandrina Council, South Australia, Australia
61.0km (37.9 miles) ⓘMaslin Beach, City of Onkaparinga, South Australia, Australia
References
Eggleton, R. A. (1959). The geology of some pegmatites near Gumeracha South Australia. Honours thesis.
 
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