Species Natural Australian Sapphire Variety Blue Green Sapphire Shape And Cut Oval Cut Weight 0.64 Carat Measurements 6 x 3 x 2.8mm Color Blue Green Transparency Transparent Standard heated like nearly all sapphires on the market. No diffusion or other treatment. Excellent cut and and excellent clarity, a very clean stone. VS. All items sent by 'signed for' or 'next day' delivery for UK buyers, 'insured tracked & signed' for Europe and international buyers.