Roberto Coin .32 ct. t.w. Diamond Double Circle Earrings With Ruby In 18kt Yellow Gold. Drop Earrings - Founded in Vicenza, the City of Gold in 1977, Roberto Coin jewelry celebrates the elegance of femininity, creativity and craftsmanship. Each of his collection pieces carries his signature in a hidden position on the inside: a small ruby as Roberto Coin's secret gift of good wishes to every woman wearing one of his pieces. Presented here are swirl design double circle earrings with .32 ct. t.w. diamonds. Post/clutch backing. In polished 18kt yellow gold. Hanging Length: 2"