Program aims to educate young consumers about mined stones’ positive qualities.
Event’s success comes amid geopolitical tensions and a downturn in some markets, organizers say.
Prize includes $25,000 grant and summer placement for an emerging student.
49.91-carat diamond ring likely to fetch up to $700,000.
Piece sells for $793,300 against a $614,900 price tag in Geneva.
New chief exec will succeed David Block.
Sales up 89% year on year thanks to new collections and strong consumer confidence.
Jeffrey Gennette has more than 40 years of leadership experience.
Designers receive prizes for creativity, artistry and excellence in design.
Overall prices down 0.9% year on year.
Diamex founder will succeed Feriel Zerouki.