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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Offretite from
Basalt quarry, Jindivick, Baw Baw Shire, Victoria, Australia


01703720017884427711845.jpg
Offretite, etc.

Basalt quarry, Jindivick, Baw Baw Shire, Victoria, Australia
01703720017884427711845.jpg
Offretite, etc.

Basalt quarry, Jindivick, Baw Baw Shire, Victoria, Australia
06594810017884427726823.jpg
Offretite, etc.

Basalt quarry, Jindivick, Baw Baw Shire, Victoria, Australia
Locality type:Quarry
Classification
Species:Offretite
Formula:KCaMg(Si13Al5)O36 · 15H2O
Comments:"Fibrous overgrowth of offretite on (0001) faces of Jindivick levyne crystals give the levyne a frosted appearance. The fibrous coatings may be up to 0.5 mm thick, which represents up to 5 times the thickness of the levyne crystal."
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Lévyne-Ca3
Cowlesite2
Montmorillonite2
Chabazite-Ca2
Analcime2
Calcite1
Erionite Subgroup1
Thomsonite-Ca1
Data
Mineral Data:Click here to view Offretite data
Locality Data:Click here to view Basalt quarry, Jindivick, Baw Baw Shire, Victoria, Australia
Data Identifiers
Mindat Occurrence Record ID:89618
Long-form Identifier:1:3:89618:8
GUID (UUID V4):0
Nearest other occurrences of Offretite
28.0km (17.4 miles) ⓘBlue Rock Dam (Blue Rock quarry), Willow Grove, Baw Baw Shire, Victoria, Australia
76.5km (47.6 miles) ⓘSunderland Bluff, Phillip Island, Bass Coast Shire, Victoria, Australia
81.4km (50.6 miles) ⓘRed Bluff, Phillip Island, Bass Coast Shire, Victoria, Australia
81.5km (50.7 miles) ⓘRedcliff Head (Red Cliff Head), Phillip Island, Bass Coast Shire, Victoria, Australia
81.5km (50.7 miles) ⓘBerrys Beach, Phillip Island, Bass Coast Shire, Victoria, Australia
96.3km (59.9 miles) ⓘCairns Bay, Flinders area, Mornington Peninsula Shire, Victoria, Australia
98.1km (61.0 miles) ⓘSimmons Bay, Flinders area, Mornington Peninsula Shire, Victoria, Australia
References
Birch, Bill Dr. (1987) Zeolites from Jindivick, Victoria. Australian Mineralogist, 2 (1). 15-19
Haupt,J. (1989) Chapter 4: South Gippsland. In Zeolites of Victoria. Mineralogical Society of Victoria. p.110
Tschernich, Rudy W. (1992) Zeolites of the World. Geoscience Press, Inc. 567pp.
 
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