6.70 ct Extraordinary Cushion (9.37 x 7.29 mm) Cambodian Blue Zircon Gemstone

6.70 ct Extraordinary Cushion Cut (9 x 7 mm) Cambodian Blue Zircon Natural Loose Gemstone. Mohs Hardness – 6.5-7 – Found in – Sri Lanka, Cambodia, Thailand, France, Norway, Tanzania and Australia. The colorless stones closely resemble diamonds, but impurities will produce stones of yellow orange, blue, red, brown, and green.