Chondrodite

Chondrodite is named after Greek "chondros" - a grain, alluding to its frequent granular appearance.

Transparent to translucent orange-brown specimens exhibiting orange-brown to yellow-brown pleochroism have been reported from Sri Lanka. Transparent deep garnet-red material of gem-quality is found in the Tilly Foster mine, Brewster, New York, USA.

Chondrodite is one of the rarest and most beautiful of gemstones and it is occasionally faceted for collectors.

Chondrodite Gemstones by Colour

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

Chondrodite Gemstones by Size

This table shows distribution of Chondrodite 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:0.09 cts
Heaviest:1.06 cts
Average:0.60 cts
Total photos:3
Do you have a larger Chondrodite? Why not upload a photo?
0.09ct to 0.19ct0.19ct to 0.28ct0.28ct to 0.38ct0.38ct to 0.48ct0.48ct to 0.58ct0.58ct to 0.67ct0.67ct to 0.77ct0.77ct to 0.87ct0.87ct to 0.96ct0.96ct to 1.06ct
General Information
Chemical Formula
(Mg,Fe)
 
5
(SiO
 
4
)
 
2
(F,OH)
 
2
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
More from other references
Physical Properties of Chondrodite
Mohs Hardness6 to 6.5
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
More from other references
Specific Gravity3.10 to 3.20
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
More from other references
Cleavage QualityDistinct
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
More from other references
FractureUneven,Sub-Conchoidal
Arthur Thomas, Gemstones (2009)
Optical Properties of Chondrodite
Refractive Index1.589 to 1.670
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
More from other references
Optical CharacterBiaxial/+
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
More from other references
Birefringence0.025 to 0.036
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
More from other references
PleochroismOrange-brown to yellow-brown
Michael O’Donoghue, Gems, Sixth Edition (2006)
More from other references
DispersionNil
Arthur Thomas, Gemstones (2009)
Colour
Colour (General)Yellow, red, brownish
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
More from other references
TransparencyTransparent,Translucent,Opaque
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
More from other references
LustreVitreous,Resinous
Arthur Thomas, Gemstones (2009)
Fluorescence & other light emissions
Fluorescence (Short Wave UV)Inert to moderate yellow
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
Fluorescence (Long-Wave UV)Inert to weak orange
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
More from other references
Crystallography of Chondrodite
Crystal SystemMonoclinic
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
More from other references
HabitCharacteristically flattened crystals
Michael O’Donoghue, Gems, Sixth Edition (2006)
More from other references
Geological Environment
Where found:In contact metamorphic zones, in limestones and dolostones, associated with felsic to alkalic plutonic rocks, especially with Fe-B-F metasomatism; in a carbonatite.
Anthony et al, Handbook of mineralogy (2001)
More from other references
Further Information
Mineral information:Chondrodite information at mindat.org
Significant Gem Localities
Myanmar
 
  • Mandalay Region
    • Pyin-Oo-Lwin District
      • Mogok Township
        • Mogok Valley
        • On-dan
Ted Themelis (2008) Gems & mines of Mogok
USA
 
  • New York
    • Putnam County
      • Town of Southeast
Gems, Sixth Edition, Michael O’Donoghue, 2006, p. 399
Copyright © Jolyon & Katya Ralph 1993-2024. Site Map. Photographs are copyright of the individuals who submitted them. For more information please contact the . Gemdat.org is an online information resource dedicated to providing free gemmological information to all.