Burmese Blue Sapphire/0.50ctw 6 Round Burmese Blue 2.5mm Sapphire stones @0.50ctw Set in Vermeil Yellow Gold over 925 S Sterling Silver Mohs Hardness Scale: 9 Enhancement: Heated to enhance color/clarity Birthstone for the month of September. 5th, 45th & 70th Wedding Anniversary Gemstone Metaphysical Properties: The sapphire is an ideal gemstone for those looking to channel their energies into clear, positive thinking to accomplish goals. Boxed