Program aims to educate young consumers about mined stones’ positive qualities.
Piece carries estimate of up to $400,000 at May 5 sale.
The executive director of fine jewelry talks about her professional journey, her role models, and her love affair with Art Deco.
Carved into history: Cameos and intaglios from as far back as the Roman Empire dominate the New York auction.
Sale totals $11.1 million, with turban ornament as highest seller.
Jadeite necklace, green and yellow diamonds, and rubies are top items on offer.
Kashmir sapphire weighing 7.58 carats fetches $1 million — more than double its upper estimate.
Gold-plated and gem-set Monopoly board sells for more than five times its estimate.
126.76-carat stone appeared without reserve at New York Magnificent Jewels auction.
Collection from American jeweler Sidney Mobell will appear at Bonhams in June.
D-color, internally flawless stone carries estimate of up to $15 million at New York Magnificent Jewels.