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Lazurite

Big Photo

Lapis lazuli
Afghanistan
15.19 carats
© Rarestone.com

Lazurite Gemstones by Colour

This table shows the variety of hues this gemstone can be found in. Click on a photo for more information.
 
General Information
Varieties/Types:
Lapis lazuli
Chemical Formula
(Na,Ca)
 
8
Al
 
6
Si
 
6
O
 
24
(SO
 
4
,S,Cl)
 
2
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
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Physical Properties of Lazurite
Mohs Hardness5.5
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
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Specific Gravity2.75
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
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TenacityBrittle
Anthony et al, Handbook of mineralogy (2001)
Cleavage QualityPoor
Arthur Thomas, Gemstones (2009)
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FractureUneven
Arthur Thomas, Gemstones (2009)
Optical Properties of Lazurite
Refractive Index1.500
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
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Optical CharacterIsotropic
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
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DispersionNil
Arthur Thomas, Gemstones (2009)
Colour
Colour (General)Blue
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
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Causes of ColourBlue (lapis lazuli), S3 - (charge transfer)
W. William Hanneman, Pragmatic Spectroscopy For Gemologists (2011)
TransparencyOpaque
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
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LustreVitreous
Arthur Thomas, Gemstones (2009)
Crystallography of Lazurite
Crystal SystemIsometric
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
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HabitDodecahedral
Arthur Thomas, Gemstones (2009)
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Geological Environment
Where found:A contact metamorphic mineral in limestones
Anthony et al, Handbook of mineralogy (2001)
Inclusions in Lazurite
Commonly blue (lazurite) speckled with white (calcite) spots, golden coloured pyrite inclusions - Gemmological Tables, Ulrich Henn and Claudio C. Milisenda, 2004, p 4
Further Information
Mineral information:Lazurite information at mindat.org
Significant Gem Localities
Afghanistan
 
  • Badakhshan
    • Kuran wa Munjan District
      • Koksha Valley
        • Sar-e-Sang
[var: Lapis lazuli] Bowersox and Chamberlin (1995)
Asia
 
[var: Lapis lazuli] Spiridonov (1998)
Chile
 
  • Coquimbo
    • Limarí Province
      • Ovalle
[var: Lapis lazuli] Ward (1996)
Myanmar
 
  • Mandalay Region
    • Pyin-Oo-Lwin District
      • Mogok Township
        • Bernardmyo
[var: Lapis lazuli] Ted Themelis (2008) Gems & mines of Mogok
[var: Lapis lazuli] Ted Themelis (2008) Gems & mines of Mogok
        • Chaung-gyi
[var: Lapis lazuli] Ted Themelis (2008) Gems & mines of Mogok
[var: Lapis lazuli] Ted Themelis (2008) Gems & mines of Mogok
[var: Lapis lazuli] Ted Themelis (2008) Gems & mines of Mogok
[var: Lapis lazuli] Ted Themelis (2008) Gems & mines of Mogok
[var: Lapis lazuli] Ted Themelis (2008) Gems & mines of Mogok
        • Kyatpyin North
[var: Lapis lazuli] Ted Themelis (2008) Gems & mines of Mogok
        • Kyauk-Pyat-That
[var: Lapis lazuli] Ted Themelis (2008) Gems & mines of Mogok
        • Marble Ark
[var: Lapis lazuli] Ted Themelis (2008) Gems & mines of Mogok
        • Mogok Valley
          • Dattaw-taung (Dattaw hill)
            • Dattaw-mid
[var: Lapis lazuli] Ted Themelis (2008) Gems & mines of Mogok
[var: Lapis lazuli] Ted Themelis (2008) Gems & mines of Mogok
[var: Lapis lazuli] Ted Themelis (2008) Gems & mines of Mogok
        • Pein-Pyit (Painpyit; Pyan Pyit)
Ted Themelis (2008) Gems & mines of Mogok
Russia
 
  • Irkutsk Oblast
[var: Lapis lazuli] Spiridonov (1998)
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