Citrine quartz and diamond ring, Verdura The oval citrine weighing approximately 23.50 carats, bordered by triangular segments of pavé-set round diamonds weighing approximately 1.00 carat, mounted in 18 karat gold and platinum, size 6½, signed Verdura....

Citrine quartz and diamond brooch, Cartier, Paris, circa 1930 Set with an oval citrine weighing approximately 22.75 carats, within an arched frame set with 46 old European-cut and single-cut diamonds weighing approximately 1.50 carats, mounted in platinum,...