What is the sapphire crystal?

Sapphire crystal is an optically transparent, crystalline material that belongs to the Rhombohedral, class 3m, crystallographic system. Some unique qualities of sapphire:

Second only to diamond in hardness.
Sapphire is thermally stable at extremely high temperatures with a melting point of 2030C.
Exceptional chemical stability.
Very low dielectric constant and very low loss tangent value.

Similar questions

About synthetic sapphire
What is the sapphire crystal?
What is maximum sizes of the Sapphire crystals?
What is the difference between natural and synthetic sapphire?
What is the technical sapphire?
I have some random orientation sapphire windows, what is the easiest way to determine the planes of them?

<<< back to Frequently Asked Questions List