Program aims to educate young consumers about mined stones’ positive qualities.
Inflation has driven moderation and selectivity in purchasing, according to NRF.
Company wants to streamline portfolio and focus on core assets.
Sale also featured 6.21-carat pink that netted $12 million.
Move is part of major changes to simplify parent company's portfolio and deliver growth.
Auction house has appointed Dianne Batista as senior vice president for jewelry and watches.
Shoppers shelled out $331.6 billion in the first four months of the year, according to Adobe Analytics.
Hackers force auction house to take website offline and bring in experts.
Revenue down 0.4% year on year in first quarter.
Sales slip 4% amid decrease in top-up payments from HB.
Standard line of I to J stones will retail at $500 per carat.