Dyed purple Jade (Lavender jade or purple “Fei Cui”) from Mandalay’s jade market, Myanmar
Montira Seneewong-Na-Ayutthaya, Bhuwadol Wanthanachaisaeng, Thanapong Lhuaamporn, Waratchanok Suwanmanee, Wilawan Atichat, and Thanong Leelawatanasuk
Padparadscha Sapphire & heat treatment
In 2018 the Padparadscha engagement ring of Princess Eugenie (Figure 1), the niece of the king, gave
Blue sapphire from Malacacheta of Minas Gerais, Brazil
Malacacheta, located in Minas Gerais, Brazil, is renowned for its alexandrite deposits and com-plex
Identification of melee size synthetic coloured diamond for jewellery
Synthesis methods to produce large and high-quality dia- mond for jewellery have been improved over