Identification of melee size synthetic coloured diamond for jewellery
Kentaro Emori, Hiroshi Kitawaki, Mio Hisanaga, Masahiro Yamamoto
Rubies from Greenland
Gemology is traditionally practiced in laboratories, focused on identifying and analyzing gemstones.
Padparadscha Sapphire & heat treatment
In 2018 the Padparadscha engagement ring of Princess Eugenie (Figure 1), the niece of the king, gave