Program aims to educate young consumers about mined stones’ positive qualities.
All items on offer found buyers, with 60% fetching above high estimates.
Ring brings in $25.3 million at Sotheby’s Hong Kong, just below $26 million low estimate.
Despite a poor showing at the fall sales, large colored diamonds and historical jewels look like they will gain steam this spring.
Lot becomes second-most valuable jewel ever sold at auction.