Gemstones : Sapphire.
Chemicals : Calcium Fluoride, Potassium Bromide.
Laser crystals, Nd, YAG, Cr:YAG, Yb, YAG, YVO4, Magneto-Optical crystals, TGG, TSAG, Scintillation crystals, CE, LUAG, CE, GAGG, Nonlinear crystals, LBO, BBO, KTP, Piezoelectric crystals, LINBO3, Quartz, Optical Windows, K9, Quartz.