Program aims to educate young consumers about mined stones’ positive qualities.
Collector Heidi Horten’s husband made his fortune during Third Reich.
Emeralds were top sellers, as were pink and yellow diamonds.
Brand doubled its high-jewelry sales and saw strong demand for Lock bracelet collection.
Jewelry revenue up 25% year on year in third quarter.
2.42-carat fancy-intense blue is top-seller at New York auction, bringing in $1.4 million.
Signature beaded products became the foundation of this US brand, which Steven Lagos founded as a small jewelry-repair business in Philadelphia.
Artcurial will offer emerald-cut, D-color stone at Monaco Luxury week in July.
Ring is star of Paris online auction, which will also feature the private collection of designer Jean Fouquet.