Vintage 18ct Gold 0.18CT Diamond Art Deco Trilogy Ring

A wonderful 18ct yellow Gold Art Deco Trilogy ring, comprising of three graduated Brilliant Cut Diamonds, ranging from a .10 center stone and flanked by two .04ct stones, set in a square whitew Gold open back gallery with Millegrain detail. Ring size= M 1/4. Can easily be resized. Unmarked tested as 18ct. Circa 1930.