Program aims to educate young consumers about mined stones’ positive qualities.
Revenue from segment gained 21% in latest fiscal year.
Enquirus allows owners of luxury items to register their pieces.
US and European demand outweighed slow Chinese market in third fiscal quarter.
Revenue up 24% in first half.
Digital specialist Farfetch buys 47.5% of loss-making e-commerce business.
Shareholders should reject proposal to add former LVMH executive to board, Johann Rupert says.