Corundum - UV-Vis 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
375 & 385 nm: Fe3+ pairs, 450 & 468 nm: Fe3+585 nm: Fe2+-Ti4+ IVCT, 885 nm: Fe2+-Fe3+ IVCT
375 & 385 nm: Fe3+ pairs, 448 & 467 nm: Fe3+570 & 705 nm: Fe2+-Ti4+ IVCT, 850 nm: Fe2+-Fe3+ IVCT
377 & 388 nm: Fe3+ pairs, 453 & 468 nm: Fe3+565 & 717 nm: Fe2+-Ti4+ IVCT, 850 nm: Fe2+-Fe3+ IVCT
