Chrome-Diopside

Big Photo

Russia
1.26 carats
© Rarestone.com

Chrome-Diopside is a chrome-bearing variety of Diopside with strong emerald green colour.

Chrome-Diopside Gemstones by Colour

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

Chrome-Diopside Gemstones by Size

This table shows distribution of Chrome-Diopside 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:0.18 cts
Heaviest:4.85 cts
Average:0.80 cts
Total photos:41
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0.18ct to 0.65ct0.65ct to 1.11ct1.11ct to 1.58ct1.58ct to 2.05ct2.05ct to 2.52ct2.52ct to 2.98ct2.98ct to 3.45ct3.45ct to 3.92ct3.92ct to 4.38ct4.38ct to 4.85ct
General Information
A variety or type of:Diopside
Other Names/Trade Names:
Chemical Formula
(Ca,Cr)MgSi
 
2
O
 
6
Gemdat.org, Management Team (2012)
Photos of natural/un-cut material from mindat.org
Physical Properties of Chrome-Diopside
Mohs Hardness5 to 6
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
Specific Gravity3.22 to 3.40
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
Cleavage QualityDistinct
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
FractureConchoidal
Arthur Thomas, Gemstones (2009)
Optical Properties of Chrome-Diopside
Refractive Index1.668 to 1.703
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
More from other references
Optical CharacterBiaxial/+
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
Birefringence0.024 to 0.030
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
More from other references
Colour
Colour (General)Emerald green
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
Colour (Chelsea Filter)Reddish
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
Causes of ColourGreen, Cr3+ in octahedral coordination
W. William Hanneman, Pragmatic Spectroscopy For Gemologists (2011)
TransparencyTransparent
Michael O’Donoghue, Gems, Sixth Edition (2006)
LustreVitreous
Arthur Thomas, Gemstones (2009)
Crystallography of Chrome-Diopside
Crystal SystemMonoclinic
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
HabitPrismatic, massive
Arthur Thomas, Gemstones (2009)
Geological Environment
Where found:Kimberlites and apoultramafic metasomatites Xenoliths in alkali basalts.
E. Ya. Kievlenko, Geology of gems (2003)
Further Information
Mineral information:Chrome-Diopside information at mindat.org
Significant Gem Localities
Russia
 
  • Sakha Republic (Yakutia)
    • Aldan Shield
      • Aldan
        • Inagli Massif
Gadiyatov (1996)
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