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 "Venetian Princess" collection, this elegant clover necklace sparkles with .17 ct. t.w. round brilliant-cut diamond petals that present a gorgeous .75 carat flower-shaped Swiss blue topaz. Finely crafted in polished 18kt rose gold. Rolo chain includes a 2" extender. Made in Italy. Lobster clasp, Roberto Coin diamond and Swiss blue topaz pendant necklace.