Sapphire Gemstone Information
About Sapphire – History and Introduction Sapphire is a gem quality variety of the mineral corundum. It is the second hardest substance on earth after diamond, rating 9 on the Mohs scale of mineral hardness. Corundum itself is not a very rare mineral, but gem-quality corundum is extremely rare. Most corundum is opaque to translucent […]
Sapphire Gemstone Information Read More »










