Sapphire has a hardness of 9 on the Mohs scale. This beautiful piece of Sapphire from The Umba Valley in Tanzania weighs 2.56cts, measures 9x7x4mm and has some small viels.UMBA SAPPHIRE 2.56 CTS 9X7X4MMSKU: 99#180 $470.00 Regular Price$99.00Sale PriceQuantityAdd to CartBuy Now