Founded in Vicenza, the City of Gold in 1977, Roberto Coin jewelry celebrates the elegance of femininity, creativity and craftsmanship. Thes… Founded in Vicenza, the City of Gold in 1977, Roberto Coin jewelry celebrates the elegance of femininity, creativity and craftsmanship. These luxurious inside-outside hoop earrings dazzle with .20 ct. t.w. round brilliant-cut diamonds in polished 18kt yellow gold. Length is 1/2". Made in Italy. Hinged post, Roberto Coin diamond inside-outside hoop earrings.