Vintage Marquise Aquamarine Filigree Ring in 14k.  This gorgeous cocktail ring comes from the Art Deco era and features a 2.19 carat marquise cut aquamarine set in 14 karat white gold. Beautifully engraved with very delicate details wrapping around the aquamarine this is a wonderful example of Art Deco craftsmanship. Made by Belais Brothers, the jewelers who held the very first patent on white gold, this is a fine piece of history that retains all of the old world style.