Program aims to educate young consumers about mined stones’ positive qualities.
Lot featuring two 5.01-carat stones will carry a $304,000 high estimate at the May 14 auction.
Black-diamond ring sells for $122,499, making six times its high estimate.
Exec was at technology company for 25 years, including nine as chief.
Stewart Young previously led the department at Bonhams.
Ring with 6.03-carat stone will feature in May 12 High Jewelry auction.
Susie Dewey brings over 17 years of experience to position.
Unanimous vote extends executive’s term for three years.
Goldstar Jewellery CEO is up against incumbent Edward Asscher, who wants to remain in role.
One of two featured Art Deco necklaces appeared in 1974 film adaptation of The Great Gatsby.
Output up 8% at 15.2 million carats.