Montmorillonite


Composition: (Na,Ca)0.3(Al,Mg)2Si4O10(OH)2.nH2O
Crystal System : Monoclinic
Colours: White, grey, pale-yellow, pale-green
Lustre : Dull
Hardness (H) : 1-2
Specific Gravity (S.G) : 2.0-2.5

Distribution

Rare. Part of the argillaceous component of the feldspatic sandstone ("pseudo-aplite") derrived from the Tschudi Formation sediments.

Occurrence

  • Country Rock