Cavansite
Ca(VO)(Si4O10).4H2O
Crystal System: Orthorhombic
Hardness: 3.0-4.0
Density: 2.21-2.31

Cavansite is associated with Pentagonite, Calcite, Heulandite, Apophyllite and Stilbite.

Stuart provides the following remarks:

"This is a brilliant electric blue, radiating ball of cavansite crystals on a stilbite matrix from the Wagholi Quarry, near Poona, India. These are considered the finest for their species. They were first shown to the world just a few years ago at the Tucson show and were immediate classics."

Stilbite
Sodium Calcium Aluminum Silicate Hydrate, NaCa2Al5Si13O36.14H2O
Crystal System: Monoclinic
Hardness: 3.5-4.0
Density: 2.1

Stilbite is a widespread member of the zeolite group that is most commonly found in vesicles and cavities in lavas, especially basalt, and more rarely as lithoclases in metamorphic rocks. Stilbite is associated with calcite, heulandite and other zeolites,

Stilbite occurs as transparent to translucent prismatic crystals, often in sheaf-like aggregates of twinned crystals. It also occurs as pseudo-orthorhombic crystals and as fibrous, radiating masses. It varies in color from white, gray, yellowish or reddish-brown.

Rocks from Stuart Wilensky's Collection

Index of Specimen Images

Table of Contents

bkeller@rockhounds.com 8/8/95