Minerals & Gemstone 480x104
Minerals & Gemstone 480x104
wpdiamonds.com
Gemstones 160x600



Advertising Information

Green Prehnite Cabochon

The Gemstone Prehnite




Prehnite gemstones are usually light green in color, with a whitish hue or yellowish tinge. Deep green gemstones are not common. Prehnite gemstones often appear cloudy or velvety, and rarely fully transparent. They may also contain colors zones of lighter and darker green.
Chemical Formula Ca2Al2Si3O12(OH)
Color Green
Hardness 6 - 6.5
Crystal System Orthorhombic
Refractive Index 1.61 - 1.64
SG 2.8 - 3.0
Transparency Translucent
Double Refraction .030
Luster Vitreous, waxy
Cleavage 1,1;3,1
Mineral Class Prehnite


Prehnite AUCTIONS

ALL ABOUT
Prehnite has always been a minor collectors gemstone, but relatively recent deposits discovered in Africa containing facetable Prehnite in large quantities has made this gemstone more available and popular.  Prehnite is very sensitive to heat and has perfect easily chips, so care must be exercised when cutting. Prehnite Cat's Eyes do exist from the Australian finds, but these are very rare.


USES
Prehnite is an inexpensive gemstone, and due its lack of full transparency it is usually cut into cabochons and beads. Other facets may be cut, but less commonly. Prehnite may also be carved into small ornamental objects such as flowers.




Prehnite TREATMENTS AND ENHANCEMENTS
Prehnite gemstones are natural and not heated or artificially enhanced.

Prehnite SOURCES
Prehnite sources include Mali, South Africa, Namibia, Australia, China, and the U.S. (New Jersey).


SIMILAR GEMSTONES
Peridot - Slightly harder and usually more transparent.
Jade - Usually deeper in color and less transparent.


Prehnite PHOTOS [Click photos for more details]

Prehnite IN THE ROUGH PHOTOS [Click photos for more details]

 
ADDITIONAL RESOURCES
 
DISCUSSIONView Forum | Post to Forum
Have a question about Prehnite? Visit our Q&A Community and ask the experts!
PAGE SPONSOR  

To sponsor this page, click here.
Let us know how we can update this page
(Click for more details)
We strive for accurate content and locality information. If you feel any of the content is incorrect, or if you feel we are missing vital locality information, please fill out the form below so we can update the site. If you are requesting a locality be added, please only include significant locality occurences for the mineral.