1.30 Carat Antique Diamond Solitaire Engagement Ring w/ Engraving1. 30 Carat Antique Diamond Solitaire Engagement Ring w Engraving. This classic Art Deco diamond solitaire engagement ring is finished in 18 karat white gold and features fabulous engraving on the shoulders. The ring contains a 1. 30 carat Old European cut diamond that sits prominently above the finger. The intricate engravings along the shoulders and almost all the way to the bottom of the shank speak to the tremendous craftsmanship of the jeweler