Rhodizite

Big Photo

Madagascar
0.80 carats
© Rarestone.com

Rhodizite is named from Greek "rhodizein" - rose-coloured, alluding to the red tinges it gives in a blowpipe flame.

Rhodizite is found as well-formed transparent to translucent colourless to white, sometomes pink, red, yellow-green, yellow, grey crystals.

Rhodizite has a high lustre and hardness, but it is very rare and crystals are usually too small to facet. Faceted stones exceeding 1 carat are uncommon.
6 photos

Rhodizite Gemstones by Colour

This table shows the variety of hues this gemstone can be found in. Click on a photo for more information.
 
 

Rhodizite Gemstones by Size

This table shows distribution of Rhodizite gemstone sizes that are listed on this site. This can give a good indication as to the general availability of this gemstone in different sizes.
Contributed photos
Lightest:0.34 cts
Heaviest:0.80 cts
Average:0.48 cts
Total photos:5
Do you have a larger Rhodizite? Why not upload a photo?
0.34ct to 0.39ct0.39ct to 0.43ct0.43ct to 0.48ct0.48ct to 0.52ct0.52ct to 0.57ct0.57ct to 0.62ct0.62ct to 0.66ct0.66ct to 0.71ct0.71ct to 0.75ct0.75ct to 0.80ct
General Information
Chemical Formula
(K,Cs)Al
 
4
Be
 
4
(B,Be)
 
12
O
 
28
Michael O’Donoghue, Gems, Sixth Edition (2006)
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Rhodizite Treatments
Irradiation of colorless stone produces intense yellow-(greenish): irradiated and natural color fade on long exposure to sunlight - Blue Chart Gem Identification, Herve Nicolas Lazzarelli, 2010, p 3
Physical Properties of Rhodizite
Mohs Hardness8 to 8.5
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
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Specific Gravity3.34 to 3.44
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
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Cleavage QualityDistinct
Arthur Thomas, Gemstones (2009)
FractureConchoidal
Arthur Thomas, Gemstones (2009)
Refractive Index1.684 to 1.694
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
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Optical CharacterIsotropic
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) Anomalous double refractionMore from other references
Birefringence
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