Above: Amethyst rough; Bulgari collier Below: Emerald rough

Wallace Chan ‘Whimsical Blue’ brooch by Wallace Chan, with jadeite, tanzanite, diamond, lapis lazuli and sapphire.

Suzanne Syz Art Jewels ‘Chesterfield’ ring by Suzanne Syz, with rubellite and brown diamond

Aerial view of the rough sorting house at Gemfields’ Montepuez ruby mine in Cabo Delgado, Mozambique. (Image credit: Gemfields)

Gemfields’ UV optical sorter with concentrate split between coarse and medium sections. (Image credit: Gemfields)