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
Port Glasgow, Inverclyde, Scotland, UK


Locality type:Town
Classification
Species:'Heulandite Subgroup' (not an IMA approved species)
Formula:(Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O
Comments:The dumps on which these minerals were found came from a road cutting.
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Heulandite Subgroup data
Locality Data:Click here to view Port Glasgow, Inverclyde, Scotland, UK
Data Identifiers
Mindat Occurrence Record ID:45159
Long-form Identifier:1:3:45159:6
GUID (UUID V4):0
Nearest other occurrences of Heulandite Subgroup
11.6km (7.2 miles) ⓘOld Kilpatrick, West Dunbartonshire, Scotland, UK
17.8km (11.1 miles) ⓘHartfield Moss, Renfrewshire, Scotland, UK
18.5km (11.5 miles) ⓘLoanhead Quarry, Beith, North Ayrshire, Scotland, UK
19.9km (12.4 miles) ⓘBoyleston Quarry, Barrhead, East Renfrewshire, Scotland, UK
24.0km (14.9 miles) ⓘCampsie Fells, Stirling, Scotland, UK
38.1km (23.7 miles) ⓘEarlsburn Reservoir, Touch Muir (Touch Forest), Stirling, Scotland, UK
40.2km (25.0 miles) ⓘTouch Muir (Touch Forest), Stirling, Scotland, UK
42.8km (26.6 miles) ⓘTouch Hills, Stirling, Scotland, UK
References
BMS Collection
 
and/or  
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