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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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Stilbite Subgroup from
Port Lincoln Gneiss Quarry (D.K. Quarries; DK Quarries), Duck Ponds, District Council of Lower Eyre Peninsula, South Australia, Australia


04450680017365062342436.jpg
Stilbite Subgroup

Port Lincoln Gneiss Quarry, Duck Ponds, District Council of Lower Eyre Peninsula, South Australia, Australia
04450680017365062342436.jpg
Stilbite Subgroup

Port Lincoln Gneiss Quarry, Duck Ponds, District Council of Lower Eyre Peninsula, South Australia, Australia
08124730017272329001433.jpg
Stilbite Subgroup

Port Lincoln Gneiss Quarry, Duck Ponds, District Council of Lower Eyre Peninsula, South Australia, Australia
Locality type:Quarry
Classification
Species:'Stilbite Subgroup' (not an IMA approved species)
Formula:M6-7[Al8-9Si27-28O72] · nH2O
Confirmation
Validity:Confirmed
Confirmation Methods:SEM-EDS
Data
Mineral Data:Click here to view Stilbite Subgroup data
Locality Data:Click here to view Port Lincoln Gneiss Quarry (D.K. Quarries; DK Quarries), Duck Ponds, District Council of Lower Eyre Peninsula, South Australia, Australia
Data Identifiers
Mindat Occurrence Record ID:887449
Long-form Identifier:1:3:887449:8
GUID (UUID V4):0
References
Personal Collection of Mark Willoughby
 
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