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, this whimsical butterfly necklace shines in textured and polished 18kt yellow gold with a trio of round brilliant-cut diamonds sparkling in the middle. Rolo chain includes a 2" extender. Made in Italy. Lobster clasp, Roberto Coin 18kt yellow gold butterfly necklace.