Undoped Yttrium Aluminium Garnet (Y3Al5O12 or YAG) is a substrate and optical material that can be used for both UV and IR optics. Yttrium Aluminium Garnet (Y3Al5O12 or YAG) is useful for high-temperature and high-energy applications. The mechanical and chemical stability of Yttrium Aluminium Garnet (Y3Al5O12 or YAG) is similar to that of Sapphire, but undoped YAG is not birefringent and is available with high optical homogenity.We provide Yttrium Aluminium Garnet (Y3Al5O12 or YAG) with different dimensions and specifications for the use in industrial, medical and scientific fields. Undoped YAG is grown utilising the Czochralsky technique. The as-grown Yttrium Aluminium Garnet (Y3Al5O12 or YAG) crystals are then processed into rods, slabs or prisms, coated and inspected per customer specifications. Undoped YAG shows no trace absorbtion in the 2 - 3 µm region where Glasses tend to be highly absorbent because of the strong H2O band.