EMERALD
Emeralds captivating green colour is due to the presence of Chromium and Vanadium in Beryl. Colour and transpancy are the main attributes of the finest gems, although eye-clean examples of over a carat are rare, with most stones having a turbid 'Jardin' of inclusions and a sleepy appearance.
Most commercially available gems are treated, the industry standard and acceptable treatment being colourless oil which reduces the visibility of white surface-reaching fractures and serves to stabilise the stone.
Notable sources include Colombia, Zambia, Brazil and Zimbabwe.
Most commercially available gems are treated, the industry standard and acceptable treatment being colourless oil which reduces the visibility of white surface-reaching fractures and serves to stabilise the stone.
Notable sources include Colombia, Zambia, Brazil and Zimbabwe.
