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, these stunning 18kt yellow gold earrings boast elegant open space, sparkle with round brilliant-cut diamonds and finish with classic post/clutch backings. Made in Italy. Roberto Coin 18kt yellow gold earrings.