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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Ferrierite Subgroup from
Bílina coal mine, Bílina, Teplice District, Ústí nad Labem Region, Czech Republic


08974340017271953483215.jpg
Ferrierite-NH4

Jenišův Újezd, Bílina coal mine, Bílina, Teplice District, Ústí nad Labem Region, Czech Republic
05511740017824370055186.jpg
Ferrierite-NH4

Jenišův Újezd, Bílina coal mine, Bílina, Teplice District, Ústí nad Labem Region, Czech Republic
08519620017271998045873.jpg
Ferrierite-NH4

Jenišův Újezd, Bílina coal mine, Bílina, Teplice District, Ústí nad Labem Region, Czech Republic
09763810017271998052642.jpg
Ferrierite-NH4

Bílina coal mine, Bílina, Teplice District, Ústí nad Labem Region, Czech Republic
08974340017271953483215.jpg
Ferrierite-NH4

Jenišův Újezd, Bílina coal mine, Bílina, Teplice District, Ústí nad Labem Region, Czech Republic
07050260017498460303947.jpg
Ferrierite-NH4

Jenišův Újezd, Bílina coal mine, Bílina, Teplice District, Ústí nad Labem Region, Czech Republic
08519620017271998045873.jpg
Ferrierite-NH4

Jenišův Újezd, Bílina coal mine, Bílina, Teplice District, Ústí nad Labem Region, Czech Republic
09763810017271998052642.jpg
Ferrierite-NH4

Bílina coal mine, Bílina, Teplice District, Ústí nad Labem Region, Czech Republic
02540110017271953507697.jpg
Ferrierite-NH4

Jenišův Újezd, Bílina coal mine, Bílina, Teplice District, Ústí nad Labem Region, Czech Republic
05511740017824370055186.jpg
Ferrierite-NH4

Jenišův Újezd, Bílina coal mine, Bílina, Teplice District, Ústí nad Labem Region, Czech Republic
01419010017271998095601.jpg
Ferrierite-NH4

Jenišův Újezd, Bílina coal mine, Bílina, Teplice District, Ústí nad Labem Region, Czech Republic
09763810017271998052642.jpg
Ferrierite-NH4

Bílina coal mine, Bílina, Teplice District, Ústí nad Labem Region, Czech Republic
Locality type:Colliery
Classification
Species:'Ferrierite Subgroup' (not an IMA approved species)
Formation:Secondary
Comments:Occurs on the contact of sandstone with coal seam
Quality for species:Good crystals or rich for species - important (!)
Abundance at site:Very Rare
Confirmation
Validity:Confirmed
Confirmation Methods:SEM-EDS
Associated Minerals Based on Photo Data:
Marcasite1
Data
Mineral Data:Click here to view Ferrierite Subgroup data
Locality Data:Click here to view Bílina coal mine, Bílina, Teplice District, Ústí nad Labem Region, Czech Republic
Data Identifiers
Mindat Occurrence Record ID:904713
Long-form Identifier:1:3:904713:6
GUID (UUID V4):0
References
Mineral newspaper XX. 2012/6
 
and/or  
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