Program aims to educate young consumers about mined stones’ positive qualities.
Janet Lam brings more than 17 years of experience to the role.
Jewel, centering 3.60-carat diamond, fetches $681,600 in London.
Ring carries upper estimate of $550,000 at Exceptional Jewels auction.
Necklace and unmounted gemstone bring in $83,050 each at recent Los Angeles sale.
Piece more than doubles its upper estimate at New York Jewels sale.
Ring carries a $5.5 million high estimate at December 8 auction.
After nearly three years on market, auction house sells to Pemberton Asset Management.
Nine of top 10 pieces beat high estimates.
Executive is former CEO of De Beers’ jewelry business.
Jewelry auction will showcase a collection of Cartier pieces.