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Sapphire color change

  • Translations : Color change sapphire,

If the studed sapphires are surprising, sapphires with change of color are staggering. It is a stone of the big rarity which offers the possibility of changing color according to the type of light to whom it is exposed.

Indeed, this sapphire crosses of the green-bluish in the purple - red in its best quality. The most beautiful sapphires with change of color come from Sri Lanka, Burma

To know more about the mineralogy of the sapphire change of color, to see  Mindat.org->

Gemological data

  • Chemical formula : Al2 O3
  • Hardness (Mohs) : 9
  • Density : 4
  • Refractive index : ne=1.759-1.761 no=1.767-1.770
  • Birefingence : 0.008 / 0.009
  • Crystal system : Rhombohedral - Trigonal
  • Group : Corundum

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