Transvaal Jade

Big Photo

South Africa
8.39 carats
© Palagems

A compact green jade-like variety of grossular containing up to 25% of zoisite. Frequently referred to as 'hydrogrossular', the hydrous content may be due to the zoisite component rather than it being a true hydrogarnet.

Transvaal Jade Gemstones by Colour

This table shows the variety of hues this gemstone can be found in. Click on a photo for more information.
 
General Information
A variety or type of:Grossular, which is a variety of Garnet Group
Chemical Formula
Ca
 
3
Al
 
2
(SiO
 
4
)
 
3
Arthur Thomas, Gemstones (2009)
Physical Properties of Transvaal Jade
Mohs Hardness7 to 7.5
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
Specific Gravity3.55 to 3.73
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
Cleavage QualityNone
Arthur Thomas, Gemstones (2009)
FractureConchoidal
Arthur Thomas, Gemstones (2009)
Optical Properties of Transvaal Jade
Dispersion0.027
Arthur Thomas, Gemstones (2009)
Colour
Colour (General)Green
Gemdat.org, Management Team (2012)
TransparencyTransparent
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
LustreVitreous
Arthur Thomas, Gemstones (2009)
Crystallography of Transvaal Jade
Crystal SystemIsometric
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
HabitMassive
Gemdat.org, Management Team (2012)
Further Information
Mineral information:Transvaal Jade information at mindat.org
Significant Gem Localities
South Africa
 
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