Al2O3 - Sapphire Wafer 5x5x0.5 mm, A plane (11-20), 2 SP
Sapphire rough Al2O3 single crystal blank: 1 6 inches stock other sizes can be customized|Flanges| - AliExpress
Sapphire is a precious gemstone, a variety of the mineral corundum, consisting of aluminium oxide Al2O3 with trace amo… | Precious gemstones, Gemstones, Crystals