Program aims to educate young consumers about mined stones’ positive qualities.
Kashmir sapphire weighing 7.58 carats fetches $1 million — more than double its upper estimate.
126.76-carat stone appeared without reserve at New York Magnificent Jewels auction.
Necklace estimated to sell for up to $500,000.
4.83-carat, blue diamond ring is top seller, bringing in $8.8 million.
Sapphire and diamond piece was top seller at Jewels and Jadeite sale.
Cushion-cut stone carries high estimate of nearly $435,000.
D-color, internally flawless stone carries estimate of up to $15 million at New York Magnificent Jewels.
Revenue from segment gained 21% in latest fiscal year.
Collector Heidi Horten’s husband made his fortune during Third Reich.
Jewelry from the Wolf Family garnered $8 million against a high presale price of $6 million.