Yellow Topaz #20 Lab Created Corundum Sapphire Faceting Rough for Gem Cutting - Various Sizes - Split Boule

Various sizes of Yellow Topaz 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: 55mm -75mm
Width: 16mm - 20mm
Thickness: approximately 8-11mm 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: #20

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