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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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Crandallite from
Mont-des-Groseillers, Blaton, Bernissart, Hainaut, Wallonia, Belgium


06094050017271922291871.jpg
Strontium-bearing Crandallite

Mont-des-Groseillers, Blaton, Bernissart, Hainaut, Wallonia, Belgium
01052080017363644819050.jpg
Crandallite

Mont-des-Groseillers, Blaton, Bernissart, Hainaut, Wallonia, Belgium
03834610017271978722370.jpg
Crandallite

Mont-des-Groseillers, Blaton, Bernissart, Hainaut, Wallonia, Belgium
04028850017363644816266.jpg
Crandallite

Mont-des-Groseillers, Blaton, Bernissart, Hainaut, Wallonia, Belgium
06094050017271922291871.jpg
Strontium-bearing Crandallite

Mont-des-Groseillers, Blaton, Bernissart, Hainaut, Wallonia, Belgium
07572170017362496609350.jpg
Crandallite

Mont-des-Groseillers, Blaton, Bernissart, Hainaut, Wallonia, Belgium
05591480017363644812045.jpg
Crandallite

Mont-des-Groseillers, Blaton, Bernissart, Hainaut, Wallonia, Belgium
04028850017363644816266.jpg
Crandallite

Mont-des-Groseillers, Blaton, Bernissart, Hainaut, Wallonia, Belgium
06094050017271922291871.jpg
Strontium-bearing Crandallite

Mont-des-Groseillers, Blaton, Bernissart, Hainaut, Wallonia, Belgium
07392980017363644814284.jpg
Crandallite

Mont-des-Groseillers, Blaton, Bernissart, Hainaut, Wallonia, Belgium
05777510017271978828317.jpg
Crandallite

Mont-des-Groseillers, Blaton, Bernissart, Hainaut, Wallonia, Belgium
08890440017363644811090.jpg
Crandallite

Mont-des-Groseillers, Blaton, Bernissart, Hainaut, Wallonia, Belgium
Locality type:Hill
Classification
Species:Crandallite
Formula:CaAl3(PO4)(PO3OH)(OH)6
Comments:Associated with pyrite, gypsum and/or kaolinite
Habit:rosettes up to 3.5cm consisting of prismatic crystals, small (hemi)spheres up to 2cm in concentric layers around a fibro-radial core, thin coatings, small rhombohedral crystals consisting of stacked lamellae on the surface of hemispheres around and between rosettes
Colour:colourless, ochre yellow, yellowish-brown
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Pyrite10
Gypsum1
Data
Mineral Data:Click here to view Crandallite data
Locality Data:Click here to view Mont-des-Groseillers, Blaton, Bernissart, Hainaut, Wallonia, Belgium
Photo GalleryView Gallery (47 photos)
Data Identifiers
Mindat Occurrence Record ID:70972
Long-form Identifier:1:3:70972:1
GUID (UUID V4):0
References
 
and/or  
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