Stilbite

  

This specimen is so sharp and twinned and just plain geometrically complicated, it doesn't photo very well compared to how nice it is, in person! It features one of the largest complete calcite crystals mined to date, and has edges so sharp that you'd think they could be cleavage planes except they show sings of natural growth or of stilbite association.

  

Calcite coated by stilbite on the top surfaces.

Origin: Sambava, Ansiranana, Madagascar

Sample size: 11.1 x 7.7 x 6.4 cm (top), 12.1 x 10.5 x 6.8 cm (bottom)

 

  

Stilbite on calcite

Origin: Himalaya Mine, San Diego Co., California, U.S.A.

Sample size: 5 x 4 x 2 cm

 

  

  

Ex. Marty Lewadny collection

  

Origin: Jalgaon, Maharashtra, India

Sample size: 9.1 x 7.0 x 6.8 cm (top/2nd row), 14.4 x 11.4 x 9.3 cm (3rd/bottom row)

 

 

Photo courtesy of: 

Rob Lavinsky

The Arkenstone

 

Photo courtesy of: