Chemical Properties

• Chemical Composition: Aluminium Oxide (AL2O3), (Chromium; minor component)
• Refractive index: 1.76 – 1.77
• Density: 3.9-4.1
• Specific gravity: 3.58
• DISPERSION: 0.018
• Hardness: 9 Moh’s scale

Crystal Pulling Melt – Process

It’s a method that emerged after the 18th century. Nutrients are set to melt in a crucible. Synthetic crystals begin to grow on seed equipment dipped in the solution. When the crystal forming process hit at the endpoint, the seed crystal is slowly pulled from the solution as it continues to grow.