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
Blue Jacket Mine, Seven Devils Mining District, Adams County, Idaho, USA


Locality type:Mine
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
Data
Mineral Data:Click here to view Heulandite Subgroup data
Locality Data:Click here to view Blue Jacket Mine, Seven Devils Mining District, Adams County, Idaho, USA
Data Identifiers
Mindat Occurrence Record ID:6221
Long-form Identifier:1:3:6221:3
GUID (UUID V4):0
Nearest other occurrences of Heulandite Subgroup
23.4km (14.6 miles) ⓘOxbow Dam, Baker County, Oregon, USA
27.8km (17.3 miles) ⓘPinehurst, Adams County, Idaho, USA
39.5km (24.6 miles) ⓘSquaw Creek, Riggins, Idaho County, Idaho, USA
41.6km (25.8 miles) ⓘRiggins, Idaho County, Idaho, USA
66.0km (41.0 miles) ⓘOld highway 95 roadcut, McKinzie Creek (McKenzie Creek), Idaho County, Idaho, USA
68.9km (42.8 miles) ⓘUS highway 95 roadcut (219), Skookumchuck Creek, Idaho County, Idaho, USA
References
Tschernich, Rudy W. (1992) Zeolites of the World. Geoscience Press, Inc. 567pp.
 
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