Founded in Vicenza, the City of Gold in 1977, Roberto Coin jewelry celebrates the elegance of femininity, creativity and craftsmanship. From… Founded in Vicenza, the City of Gold in 1977, Roberto Coin jewelry celebrates the elegance of femininity, creativity and craftsmanship. From the "Love in Verona" collection, this 18kt yellow gold ring twinkles with .15 ct. t.w. round brilliant-cut diamonds in lovely floral stations. Includes a hidden Roberto Coin signature inside: a tiny gemstone as a secret gift of good wishes to every woman wearing it. 1/8" wide. Made in Italy. Roberto Coin diamond ring.