Grey gold :
Grey gold is obtained by adding silver, manganese and copper in specific ratios to the gold alloy.
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.
Size :
Ring size. It is often possible to reduce or enlarge the size of the ring.
Cabochon cut :
Means a polished dome shaped gemstone stone, without facet.
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