Program aims to educate young consumers about mined stones’ positive qualities.
Auction also sees strong demand for collections from Hollywood legends Mary Tyler Moore, Barbara Sinatra and Tony Randall.
11.87-carat Burmese sapphire sells for more than three times its upper estimate.
3.06-carat stone expected to go for up to $300,000.
Fancy-intense-orangy-pink stone will lead December 5 John Moran sale.
Revenue up 10% year on year in first half.
Many top lots fall short of low estimates or fail to find buyers entirely.
This was highest total for the company’s London branch since 2010.
Top item at October 6 Magnificent Jewels sale expected to bring in up to $5.1 million.
Bangle that Queen singer wore in “Bohemian Rhapsody” video among seven pieces that smashed estimates.
Revenue from Buccellati, Cartier, and Van Cleef & Arpels up 19% year on year in first fiscal quarter.