Enstatite

Big Photo

Tanzania
7.51 carats
© Rarestone.com

Enstatite is named after Greek word for "resistor", because it resists high temperatures.

Clear transparent specimens can be faceted. Greenish-gray enstatite cat's eye ans star enstatite are known.

Enstatite has been identified in some meteorites. It is thought to be one of the early stages for the formation of crystalline silicates in Space.

Enstatite Gemstones by Colour

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

Enstatite Gemstones by Size

This table shows distribution of Enstatite 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:0.58 cts
Heaviest:26.54 cts
Average:4.59 cts
Total photos:25
Do you have a larger Enstatite? Why not upload a photo?
0.58ct to 3.18ct3.18ct to 5.77ct5.77ct to 8.37ct8.37ct to 10.96ct10.96ct to 13.56ct13.56ct to 16.16ct16.16ct to 18.75ct18.75ct to 21.35ct21.35ct to 23.94ct23.94ct to 26.54ct
General Information
Varieties/Types:
Bronzite - A green-brown iron-rich variety of Enstatite.
Chemical Formula
Mg
 
2
Si
 
2
O
 
6
Michael O’Donoghue, Gems, Sixth Edition (2006)
More from other references
Photos of natural/un-cut material from mindat.org
Physical Properties of Enstatite
Mohs Hardness5.5
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
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Specific Gravity3.20 to 3.25
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
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Cleavage QualityGood
Walter Schumann, Gemstones of the world (2001)
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FractureConchoidal
Arthur Thomas, Gemstones (2009)
Optical Properties of Enstatite
Refractive Index1.650 to 1.680
Walter Schumann, Gemstones of the world (2001)
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Optical CharacterBiaxial/+
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
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Birefringence0.009 to 0.012
Walter Schumann, Gemstones of the world (2001)
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PleochroismBrown variety has strong trichroism: pinkish red to brown - yellow - green; Green variety - distinct: yellow-green - green
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
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DispersionLittle to none
Walter Schumann, Gemstones of the world (2001)
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ChatoyancyStar 4, rarely 8. Black star: fuzzy rays, bronze color sheen
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
Colour
Colour (General)Green, yellowish-green, brownish-green, greenish-gray, yellow-brown, brownish-pink
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
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Causes of ColourGreenish brown, Fe2+. Green, Fe2+ with minor Cr3+
W. William Hanneman, Pragmatic Spectroscopy For Gemologists (2011)
TransparencyTransparent,Translucent,Opaque
Walter Schumann, Gemstones of the world (2001)
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LustreVitreous,Pearly
Arthur Thomas, Gemstones (2009)
Fluorescence & other light emissions
Fluorescence (General)None
Walter Schumann, Gemstones of the world (2001)
Crystallography of Enstatite
Crystal SystemOrthorhombic
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
More from other references
HabitPrismatic
Michael O’Donoghue, Gems, Sixth Edition (2006)
More from other references
Geological Environment
Where found:Enstatite occurs in pyroxenites, peridotites and dunites and in ultramafic inclusions in alkalic olivine basalts and kimberlite and in several other contexts.
Michael O’Donoghue, Gems, Sixth Edition (2006)
Spectrographic Data
Calculated Spectra:
Click spectra for more information
Enstatite - Locality: Unknown
Enstatite - Locality: Mogok, Burma
Enstatite - Locality: Mogok, Burma
Enstatite - Locality: Mogok, Burma
Enstatite - Locality: Burma
Enstatite - Locality: Tanzania
Further Information
Mineral information:Enstatite information at mindat.org
Significant Gem Localities
China
 
  • Fujian
    • Sanming
  • Jiangsu
    • Nanjing
Myanmar
 
  • Mandalay Region
    • Pyin-Oo-Lwin District
      • Mogok Township
        • Bernardmyo
Ted Themelis (2008) Gems & mines of Mogok
Ted Themelis (2008) Gems & mines of Mogok
          • Pyaung Gaung
Ted Themelis (2008) Gems & mines of Mogok
Ted Themelis (2008) Gems & mines of Mogok
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