Sapphire has a hardness of 9 on the Mohs scale. This beautiful piece of Sapphire from The Umba Valley in Tanzania weighs 6.40 cts, measures 9x8x7 mmUMBA SAPPHIRE 4.95 CTS. 9X8X7 MM.SKU: 25AFT#190 $1,500.00 Regular Price$375.00Sale PriceQuantityAdd to CartBuy Now