Grey white gold ring 750 (18 kt) set with spinel from Burma, non heated and diamonds. Gemmological certificate

Size : Ring size. It is often possible to reduce or enlarge the size of the ring.
Diamond : In mineralogy, diamond is an extremely rare, precious and hard (named after the ancient Greek "unbreakable") metastable allotrope of carbon, where the carbon atoms are arranged in a variation of the face-centered cubic crystal structure called a diamond lattice.
White gold : White gold is an alloy of pure gold with copper, Zinc, Palladium or nickel.
Grey gold : Grey gold is obtained by adding silver, manganese and copper in specific ratios to the gold alloy.