Program aims to educate young consumers about mined stones’ positive qualities.
Despite a poor showing at the fall sales, large colored diamonds and historical jewels look like they will gain steam this spring.
Sale price hits just above lower end of estimate.
Lot becomes second-most valuable jewel ever sold at auction.
Unmounted, 31.46- and 30-carat, D-flawless stones will go on sale in Hong Kong in October.