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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Heulandite Subgroup from
Tairua, Thames-Coromandel District, Waikato Region, New Zealand


01750880017773913586161.jpg
Heulandite Subgroup, etc.

Tairua, Thames-Coromandel District, Waikato Region, New Zealand
01750880017773913586161.jpg
Heulandite Subgroup, etc.

Tairua, Thames-Coromandel District, Waikato Region, New Zealand
02174430017770898775915.jpg
Heulandite Subgroup, etc.

Tairua, Thames-Coromandel District, Waikato Region, New Zealand
Locality type:Town
Classification
Species:'Heulandite Subgroup' (not an IMA approved species)
Formula:(Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Opal1
Mordenite1
Perlite1
Clay1
Data
Mineral Data:Click here to view Heulandite Subgroup data
Locality Data:Click here to view Tairua, Thames-Coromandel District, Waikato Region, New Zealand
Data Identifiers
Mindat Occurrence Record ID:1920690
Long-form Identifier:1:3:1920690:7
GUID (UUID V4):0
References
Rod Martin CollectionIdentified by Rod Martin: Visual Identification
 
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