They are a form of Aluminum Oxide (Al2O3) with a Trigonal Crystal Structure and a hardness of 9 on the Mohs scale.
This post first appeared on Check Price Of Natural Yellow Sapphire Pukhraj, please read the originial post: here
They are a form of aluminum oxide (Al2O3) with a trigonal crystal structure and a hardness of 9 on…
This post first appeared on Check Price Of Natural Yellow Sapphire Pukhraj, please read the originial post: here
