Product｜Colored sapphire Quality｜<<Unheated>>Grey sapphire from Australia. In fact, Australia ranks first in the world in the production of green sapphires, but generally speaking, Australian sapphires are darker, but this one is unusually transparent and shiny, and has a very high clarity, which is rare among Australian sapphires. 0.52 carats is enough for a small engagement ring. Sapphires of any color and from any region, as long as they are unheated or only heated by traditional methods, have a Mohs hardness of 9. Clean｜Flawless [Appears Flawless Under 10x Magnification] Quantity｜0.52 carats Shape｜4.96 x 5.21mm・Triangle Cutting [Triangle]・Cutting grade: Excellent Color｜Green, some parts are blue