Floral diamond engagement ring Art Deco filigree in 18k.  This elegant Art Deco, circa 1920s, 18 karat white gold ring features a .30 carat old mine cut diamond.  The shank and sides of the setting are accented with exquisite cut filigree creating a lace pillow for the center diamond.   The  milgrain detail and filigree  exemplifies true art deco style.  This solitaire antique diamond engagement ring make quite an impact.