Hot on its heels was a 16.53-carat alexandrite ring, also at Sotheby's, which set a new world record price for the stone at ...

The Sotheby’s Magnificent Jewels sale achieved £23.5m this month, with rare gemstones and white diamonds in high demand ...

The auction on Thursday totaled $30 million, with strong demand for colored gemstones, white and colored diamonds and jewels ...