Montmorillonite

Montmorillonite pseudomorph after natrolite on selenite
Origin: Dean Quarry, Cornwall, England
Sample size: 3.5 x 2.5 x 2 cm
 

Photo courtesy of: 

Rob Lavinsky

The Arkenstone

 

Ca-bearing massive montmorillonite from the Bidahochi formation
Origin: near Sander, Apache Co., Arizona, U.S.A.
Sample size: miniatures
 
Origin: Karnasurt, Lovozero, Kola Peninsula, Russia
Sample size: 2.5 x 3 cm
 
White massive as the main component of the Bentonite clay. Ex. Collection U.K. Vetter
Origin: Mina Tranquera, 80 Km N of San Juan, San Juan Province, Argentina
Sample size: 3 x 4 cm
 

Photo courtesy of: 

Diederik Visser

Diederik Visser Minerals & Petrological Services

 

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