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Diopside

Big Photo

Cabochon diopside
21.22 carats
© Palagems

Diopside Gemstones by Colour

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

Diopside Gemstones by Size

This table shows distribution of 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:1.26 cts
Heaviest:21.22 cts
Average:5.44 cts
Total photos:5
Do you have a larger Diopside? Why not upload a photo?
1.26ct to 3.26ct3.26ct to 5.25ct5.25ct to 7.25ct7.25ct to 9.24ct9.24ct to 11.24ct11.24ct to 13.24ct13.24ct to 15.23ct15.23ct to 17.23ct17.23ct to 19.22ct19.22ct to 21.22ct
General Information
Varieties/Types:
Chrome-Diopside - A chrome-bearing green variety of diopside.
Violane - Violet-blue Manganese-bearing variety of diopside
Chemical Formula
CaMgSi
 
2
O
 
6
Michael O’Donoghue, Gems, Sixth Edition (2006)
More from other references
Physical Properties of Diopside
Mohs Hardness6
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
More from other references
Specific Gravity3.24 to 3.33
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
More from other references
Cleavage QualityDistinct
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
More from other references
FractureConchoidal
Arthur Thomas, Gemstones (2009)
Optical Properties of Diopside
Refractive Index1.668 to 1.703
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
More from other references
Optical CharacterBiaxial/+
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
More from other references
Birefringence0.028 to 0.033
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
More from other references
PleochroismCommon trichroism: light green - yellow green - dark green
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
More from other references
DispersionNil
Arthur Thomas, Gemstones (2009)
ChatoyancyBlack star: white sharp rays (commonly 4)
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
Colour
Colour (General)Green, yellowish-green, bluish-green
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
More from other references
Causes of ColourGreen (Chromian Diopside), Cr3+ in octahedral coordination; V3+ in octahedral coordination. Yellowish green, Fe2+ in octahedral coordination
W. William Hanneman, Pragmatic Spectroscopy For Gemologists (2011)
TransparencyTransparent,Translucent,Opaque
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
More from other references
LustreVitreous
Arthur Thomas, Gemstones (2009)
Fluorescence & other light emissions
Fluorescence (General)Usually inert, may fluoresce white to blue white
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
More from other references
Fluorescence (Short Wave UV)No respond
Michael O’Donoghue, Gems, Sixth Edition (2006)
Fluorescence (Long-Wave UV)Some green specimens show green
Michael O’Donoghue, Gems, Sixth Edition (2006)
Fluorescence (X-RAY)Dull mustard-yellow glow
Michael O’Donoghue, Gems, Sixth Edition (2006)
Crystallography of Diopside
Crystal SystemMonoclinic
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
More from other references
HabitPrismatic crystals with nearly square cross-section and twinning common
Michael O’Donoghue, Gems, Sixth Edition (2006)
More from other references
Inclusions in Diopside
Magnetite needles: may react to magnet - Blue Chart Gem Identification, Herve Nicolas Lazzarelli, 2010, p 4
Magnetite, healing cracks, liquid inclusions - Gemmological Tables, Ulrich Henn and Claudio C. Milisenda, 2004, p 19
Further Information
Mineral information:Diopside information at mindat.org
Significant Gem Localities
Italy
 
  • Aosta Valley
    • Saint-Marcel
[var: Violane] Gemstones of the world, W.Schumann, 2001, p.190
Myanmar
 
  • Mandalay Region
    • Pyin-Oo-Lwin District
      • Mogok Township
        • Bernardmyo
Ted Themelis (2008) Gems & mines of Mogok
        • Kyauk-Pyat-That
Ted Themelis (2008) Gems & mines of Mogok
        • Marble Ark
Ted Themelis (2008) Gems & mines of Mogok
Ted Themelis (2008) Gems & mines of Mogok
Ted Themelis (2008) Gems & mines of Mogok
Ted Themelis (2008) Gems & mines of Mogok
Ted Themelis (2008) Gems & mines of Mogok
Ted Themelis (2008) Gems & mines of Mogok
Ted Themelis (2008) Gems & mines of Mogok
Ted Themelis (2008) Gems & mines of Mogok
Ted Themelis (2008) Gems & mines of Mogok
Ted Themelis (2008) Gems & mines of Mogok
        • Mogok Valley
          • Dattaw-taung (Dattaw hill)
            • Dattaw-mid
Ted Themelis (2008) Gems & mines of Mogok
Ted Themelis (2008) Gems & mines of Mogok
Ted Themelis (2008) Gems & mines of Mogok
Ted Themelis (2008) Gems & mines of Mogok
Ted Themelis (2008) Gems & mines of Mogok
Ted Themelis (2008) Gems & mines of Mogok
        • Pein-Pyit (Painpyit; Pyan Pyit)
Ted Themelis (2008) Gems & mines of Mogok
Ted Themelis (2008) Gems & mines of Mogok
Russia
 
  • Sakha
    • Aldan
      • Inagli Massif
[var: Chrome-Diopside] Gadiyatov (1996)
USA
 
  • New York
    • St. Lawrence County
      • De Kalb Township
Gems, Sixth Edition, Michael O’Donoghue, 2006, p. 405
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