31 mars 2014
A sapphire and chalcedony "quatre corps" ring, by René Boivin
A sapphire and chalcedony "quatre corps" ring, by René Boivin. Photo Christie's Image Ltd 2014 Designed as four alternating rows of circular and oval-cut sapphires and chalcedony, mounted in blackened 18k gold, 2005, with French assay mark and maker's...