Four colored rings at Christie's, 14 April 2015, New York. Photo Christie's Image Ltd 2015

A Morganite and Diamond Ring by Cartier. Estimate $5,000 - $7,000. Price Realized $56,250. Photo Christie's Image Ltd 2015

Set with a rectangular-cut morganite, flanked on either side by a fancy-shaped diamond, mounted in platinum, in a Cartier red leather case. Signed Cartier, no. 01-73051

A Yellow Sapphire and Diamond Ring. Estimate $15,000 - $20,000. Price Realized $35,000. Photo Christie's Image Ltd 2015

Set with a rectangular-cut yellow sapphire, within a collet-set diamond pendant fringe surround, to the multi-row 18k gold hoop.

An Aquamarine and diamond ring by Cartier. Estimate $5,000 - $7,000. Price Realized $32,500 . Photo Christie's Image Ltd 2015

Det with a rectangular-cut aquamarine, flanked on either side by a fancy-shaped diamond, mounted in platinum, in a Cartier red leather case. Signed Cartier, no. 7--4 (partially indistinct)

A Topaz and Diamond Ring by Cartier. Estimate $5,000 - $7,000. Price Realized $27,500 . Photo Christie's Image Ltd 2015

Set with a cushion-cut orange topaz, flanked on either side by a half moon-cut diamond, mounted in gold, in a Cartier red leather case. Signed Cartier, no. 3734

Christie's. MAGNIFICENT JEWELS, 14 April 2015, New York, Rockefeller Plaza