An 18.04-carat emerald-cut diamond set in a ring sold for $828,500 against its estimate of $400,000-$600,000 at the Bonhams New York December fine jewellery sale on December 3.
The second top performing lot was a diamond solitaire ring by Royal De Versailles. The round brilliant-cut F VS1 diamond weighing 7.01 carats, sold for $275,000, exceeding its pre-sale estimate of $180,000-$250,000.
Other colourless diamonds which sold at the auction included:
- A diamond solitaire ring with a pear-shaped brilliant-cut 5.03-carat IF Type IIa diamond sold for $250,000.
- A pair of heart-shaped diamond earrings, weighing 4.04 and 4.00 carats, G VS2 and VS1 clarity respectively, sold for $112,500.
- A diamond ring featuring a 7.92-carat G colour round, brilliant-cut diamond sold for $150,000.
A diamond ring featuring a cushion-shaped fancy light yellow VVS2 diamond weighing 18.76 carats surrounded by colourless diamonds, sold for $231,250 against its pre-sale estimate of $100,000-$150,000.
A 3-carat cushion-shaped Kashmir sapphire with no indications of heating or clarity enhancement, achieved five times its estimate, selling for $125,000 ($41,666 per carat) against its pre-sale estimate of $18,000-$25,000.
A sapphire and diamond ring by Oscar Heyman featuring an oval-shaped 17.03-carat Sri Lankan sapphire, also with no indications of heat or clarity enhancement, sold for $106,250 against its pre-sale estimate of $60,000-$80,000.