Chromophore Oxides: Oxides that produce color. In the case of Sapphire Corundum, Titanium Oxide (TiO₂) and Iron Oxide (Fe₂O₃). For Ruby, Chromium Oxide (Cr₂O₃).
Chromophore Oxides: Oxides that produce color. In the case of Sapphire Corundum, Titanium Oxide (TiO₂) and Iron Oxide (Fe₂O₃). For Ruby, Chromium Oxide (Cr₂O₃).