Program aims to educate young consumers about mined stones’ positive qualities.
Ring bearing 1.22-carat stone will lead upcoming New York Jewels sale.
Top lot was Sabbadini diamond ring that more than doubled its high estimate.
Auction house expects ‘Love Stone’ to fetch up to $4.1 million.
Bangle that Queen singer wore in “Bohemian Rhapsody” video among seven pieces that smashed estimates.
Auction house will not sell last 300 pieces due to backlash over collection owner’s Nazi ties.
Leslie Roskind served at Christie’s for 17 years.
Signed jewels and white diamonds are some of the safer bets for collectors, insiders say.
Pre-owned timepieces are beating jewelry at auction and outselling hard-to-get newer models.