Corundum - PL 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
 
Cr3+
Cr3+
Cr3+
Cr3+
Cr3+
Ti4+
Cr3+Not available
Cr3+
Cr3+
Cr3+Not available
Cr3+