This is the first and only book that explains in non-technical terms how to use pocket, portable and laboratory instruments to identify diamonds and coloured gems and to separate them from imitations and 'look-alikes'.
prečítať celé
This is the first and only book that explains in non-technical terms how to use pocket, portable and laboratory instruments to identify diamonds and coloured gems and to separate them from imitations and 'look-alikes'.
Skryť popis
Recenzie