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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Montmorillonite from
Parwan lava caves, Parwan, Moorabool Shire, Victoria, Australia


08167130017368767733403.jpg
Montmorillonite, etc.

Parwan lava caves, Parwan, Moorabool Shire, Victoria, Australia
08167130017368767733403.jpg
Montmorillonite, etc.

Parwan lava caves, Parwan, Moorabool Shire, Victoria, Australia
05199310017271987028040.jpg
Montmorillonite, etc.

Parwan lava caves, Parwan, Moorabool Shire, Victoria, Australia
Locality type:Cave
Classification
Species:Montmorillonite
Formula:(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
Comments:Montmorillonite forms rich brown waxy masses in the cave floor.
Colour:brown
Confirmation
Validity:Confirmed
Confirmation Methods:XRD
Associated Minerals Based on Photo Data:
Taranakite1
Data
Mineral Data:Click here to view Montmorillonite data
Locality Data:Click here to view Parwan lava caves, Parwan, Moorabool Shire, Victoria, Australia
Data Identifiers
Mindat Occurrence Record ID:94071
Long-form Identifier:1:3:94071:7
GUID (UUID V4):0
Nearest other occurrences of Montmorillonite
82.2km (51.1 miles) ⓘPioneer quarry, Narre Warren North, City of Casey, Victoria, Australia
96.1km (59.7 miles) ⓘCairns Bay, Flinders area, Mornington Peninsula Shire, Victoria, Australia
96.7km (60.1 miles) ⓘLittle Bird Rock, Flinders area, Mornington Peninsula Shire, Victoria, Australia
98.5km (61.2 miles) ⓘWest Head, Flinders area, Mornington Peninsula Shire, Victoria, Australia
References
Birch, W. D., Henry, D. A. - Eds. (1993) Phosphate Minerals of Victoria. Special Publication 3. Mineralogical Society of Victoria
 
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