Sapphirine

Big Photo

Sri Lanka
1.26 carats
© Rarestone.com

Sapphirine is named after its sapphire-blue colour.

Sapphirine forms irregular tabular transparent to translucent light to dark blue crystals. An orange-red variety has been reported from Tanzania.

Sapphirine has a strong pleochroism: shades of blue, pale reddish or yellowish green.

Very small stones are faceted for collectors.

Sapphirine Gemstones by Colour

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

Sapphirine Gemstones by Size

This table shows distribution of Sapphirine 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:0.22 cts
Heaviest:1.88 cts
Average:0.73 cts
Total photos:12
Do you have a larger Sapphirine? Why not upload a photo?
0.22ct to 0.39ct0.39ct to 0.55ct0.55ct to 0.72ct0.72ct to 0.88ct0.88ct to 1.05ct1.05ct to 1.22ct1.22ct to 1.38ct1.38ct to 1.55ct1.55ct to 1.71ct1.71ct to 1.88ct
General Information
Chemical Formula
(Al,Mg)
 
8
(Al,Si)
 
6
O
 
20
Michael O’Donoghue, Gems, Sixth Edition (2006)
More from other references
Photos of natural/un-cut material from mindat.org
Physical Properties of Sapphirine
Mohs Hardness7.5
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
More from other references
Specific Gravity3.40 to 3.58
Walter Schumann, Gemstones of the world (2001)
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Cleavage QualityNone
Arthur Thomas, Gemstones (2009)
FractureConchoidal
Arthur Thomas, Gemstones (2009)
Optical Properties of Sapphirine
Refractive Index1.701 to 1.724
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
More from other references
Optical CharacterBiaxial/-
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
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Birefringence0.005 to 0.007
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
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PleochroismGray to bluish gray: strong trichroism (according to body color): greenish blue/gray - blue - dark blue. Purplish-pink variety: yellow - pinkish - purplish pink.
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
More from other references
Dispersion0.019
Arthur Thomas, Gemstones (2009)
Colour
Colour (General)Dark blue, colourless, greenish, pink, violet.
Walter Schumann, Gemstones of the world (2001)
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TransparencyTransparent,Translucent
Michael O’Donoghue, Gems, Sixth Edition (2006)
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LustreVitreous
Arthur Thomas, Gemstones (2009)
Fluorescence & other light emissions
Fluorescence (General)Inert
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
Crystallography of Sapphirine
Crystal SystemMonoclinic
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
More from other references
HabitIndistinct tabular
Michael O’Donoghue, Gems, Sixth Edition (2006)
More from other references
Geological Environment
Where found:Sapphirine occurs in high-temperature rocks or xenoliths with abundant aluminium and magnesium and low silicon.
Michael O’Donoghue, Gems, Sixth Edition (2006)
Further Information
Mineral information:Sapphirine information at mindat.org
Significant Gem Localities
Kenya
 
  • Taita-Taveta County
Natural History Museum Vienna collection
Madagascar
 
  • Fianarantsoa Province
    • Ihorombe Region
      • Ihosy District
        • Mahasoa Commune
Gems, Sixth Edition, Michael O’Donoghue, 2006, p. 445
  • Tuléar Province (Toliara)
    • Anosy Region (Fort Dauphin Region)
      • Betroka District
        • Ianabinda Commune
Gems, Sixth Edition, Michael O’Donoghue, 2006, p. 445
Pakistan
 
  • Gilgit-Baltistan (Northern Areas)
    • Gilgit District
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