Imperial Topaz #25RS Lab Created Corundum Sapphire Faceting Rough for Gem Cutting - Various Sizes - Split Boule

Various sizes of Imperial Topaz colored lab created sapphire/corundum rough for faceting and gemstone creation. Each split boule is listed for sale by weight and will typically vary in size within the following ranges: Length: 65mm - 76mm Width: 15mm - 19mm Thickness: approximately 10mm at the base If you would like to see additional pictures of the piece(s) you would like, please feel free to contact me and I will be happy to provide additional pictures for you to review. Manufacturer: RGCrystals Color: #25RS Note: The color of the stone in the photo may vary slightly as not all computer monitors are calibrated the same. Mineral: Corundum Chemical Formula: Al2O3 Crystal System: Trigonal Hardness (Mohs): 9 Refractive Index: 1.76–1.77 Density, g/cm3: 4 Dispersion: 0.018 Growth Method: Flame Fusion