Bague précieuse "Cygne" en or jaune 18 ct ( 750/1000) et corail rose ornée de 26 diamants 0.8ct env. et de 12 émeraudes rondes à 0,12 carats au total.

Yellow gold : Yellow 18K gold is an alloy contianing 75% of pure gold, whereas 14K gold contains only 58,5% of pure gold.
Carat : The carat (ct) is a unit of mass equal to 2 g. Carat is used for measuring the weight of gemstones.
Emerald : Emerald is a gemstone, a variety of beryl colored in green by trace amounts of chromium, vanadium and sometimes iron. Emerald frequently contain many inclusions, with a result of poor resistance to breakage making their cutting very difficult.
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.