Corundum - IR Reflectance spectra
Sapphire:
- Blue sapphire – 0.40 ct – Auvergne, France
 - Blue sapphire - 0.04 ct crystal - Sioulot, Puy De Dôme, Auvergne, France
 - Light-blue sapphire – 5.06 ct rough – Guroji, Mambilla, Taraba, Nigeria
 - Unheated bluish-purple sapphire – 0.49 ct – Ranotsara, Madagascar
 - Violetish-blue sapphire – 0.84 ct – Likely synthetic
 - Sapphires from Graves Hill, Queensland, Australia
 - Green sapphire – 0.18 ct – Puy De Dôme, Auvergne, France
 
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