A 1.71-carat heart-shaped fancy red diamond with SI2 clarity surrounded by white diamonds and mounted on an 18k white and pink gold pendant for a necklace. Its estimate is $2.5 million - $3.5 million.

The number two lot was a platinum and yellow gold pendant necklace featuring an 84.05-carat fancy intense yellow cushion ... One of the big sales of the auction was a ring centered with a natural ...