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 "Jasmine" collection, these delightful 18kt yellow gold butterfly earrings sparkle with round brilliant-cut diamonds. Made in Italy. Post/clutch, Roberto Coin 18kt yellow gold butterfly earrings.