Natural Ruby and Diamond Ring / July Birthstone Ring / Red Ruby and Diamond Ring / Marquise Ruby Band Siffari By 1979 all the Coro

By 1979 all the Coro companies

This Art Deco ring has an onyx that is engraved with parallel lines that play with the light

The two diamonds on the side are set in the centre of a heart and each diamond is estimated to weigh 0

It is stamped 10K J(Triangle)L

Natural Ruby and Diamond Ring / July Birthstone Ring / Red Ruby and Diamond Ring / Marquise Ruby Band Siffari By 1979 all the CoroRubies are a variety of corundum crystal, the same species as sapphires. The key difference is their red color, caused by trace amounts of chromium. This spectacular red colour is why rubies have a distinct separation from sapphires in the gemstone world. The rubies and diamonds in this ring are all natural and earth mined. Most natural rubies are also treated rubies. Treated rubies still qualify as natural rubies since the stone formed in the earth.