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 "Princess Flower" collection, this 18kt yellow gold necklace features a lovely open-space floral centerpiece sparked by round brilliant-cut diamonds. Rolo chain includes a 2" extender. Made in Italy. Lobster clasp, Roberto Coin 18kt yellow gold flower necklace.