Baddeleyite

Baddeleyite is named after Joseph Baddeley, who found the original specimens in Sri Lanka in 1890.

Baddeleyite forms transparent to translucent, black, brown, yellow or colourless crystals.

Baddeleyite has strong dispersion and hight refractive indices.
General Information
Chemical Formula
ZrO
 
2
Arthur Thomas, Gemstones (2009)
Photos of natural/un-cut material from mindat.org
Physical Properties of Baddeleyite
Mohs Hardness6.5
Arthur Thomas, Gemstones (2009)
Specific Gravity5.5 to 6.0
Arthur Thomas, Gemstones (2009)
Cleavage QualityDistinct
Arthur Thomas, Gemstones (2009)
FractureConchoidal
Arthur Thomas, Gemstones (2009)
Optical Properties of Baddeleyite
Refractive Index2.13 to 2.20
Arthur Thomas, Gemstones (2009)
Optical CharacterBiaxial/-
Arthur Thomas, Gemstones (2009)
Birefringence0.07
Arthur Thomas, Gemstones (2009)
PleochroismDistinct
Arthur Thomas, Gemstones (2009)
DispersionStrong
Arthur Thomas, Gemstones (2009)
Colour
Colour (General)Black, brown, colourless, yellow
Arthur Thomas, Gemstones (2009)
TransparencyTransparent,Translucent
Arthur Thomas, Gemstones (2009)
LustreAdamantine,Vitreous
Arthur Thomas, Gemstones (2009)
Fluorescence & other light emissions
Fluorescence (Short Wave UV)Golden-brown specimens fluoresce strong ochre-yellow.
Arthur Thomas, Gemstones (2009)
Fluorescence (Long-Wave UV)Golden-brown specimens fluoresce intense ochre yellow.
Arthur Thomas, Gemstones (2009)
Crystallography of Baddeleyite
Crystal SystemMonoclinic
Arthur Thomas, Gemstones (2009)
HabitTabular
Arthur Thomas, Gemstones (2009)
Geological Environment
Where found:It is usually embedded in the carbonate-rich rock of intrusive igneous pipes (carbonatites).
Arthur Thomas, Gemstones (2009)
Further Information
Mineral information:Baddeleyite information at mindat.org
Significant Gem Localities
Myanmar
 
  • Mandalay Region
    • Pyin-Oo-Lwin District
      • Mogok Township
        • Kyauk-Pyat-That
          • Thurein-taung
Ted Themelis (2008) Gems & mines of Mogok
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