Program aims to educate young consumers about mined stones’ positive qualities.
Jewelry auction will showcase a collection of Cartier pieces.
Sapphire and diamond ring is top seller, surpassing its high estimate.
Total is highest for jewelry sale in France this year.
Ring with cushion-cut, 3.49-carat, internally flawless stone leads Magnificent Jewels auction.
Auction also sees strong demand for collections from Hollywood legends Mary Tyler Moore, Barbara Sinatra and Tony Randall.
Unmounted stone has a high presale estimate of $5 million.
Cushion brilliant-cut, 15.48-carat stone is top seller at Hong Kong Magnificent Jewels auction.
Many top lots fall short of low estimates or fail to find buyers entirely.
Platinum, sapphire and diamond ring by Ruser fetches $127,500.
Top item at October 6 Magnificent Jewels sale expected to bring in up to $5.1 million.