Sapphire has a hardness of 9 on the Mohs scale. This beautiful piece of Sapphire from The Umba Valley in Tanzania weighs 4.93cts, measures 10x7x6mm and has some small viels.UMBA SAPPHIRE 4.93 CTS 10X7X6MMSKU: UMSA#10 $1,200.00 Regular Price$360.00Sale PriceQuantityAdd to CartBuy Now