Guy Lalous ACAM EG explores a detailed characterization of Baltic amber samples treated in experiments by Wang et al.(2014) in The Journal of Gemmology, whilst discussing the criteria for identifying heat-treated amber using standard gemmological instruments, FTIR and Raman spectroscopy.
Adonis Pouroulis, Non-Executive Chairman of Petra Diamonds is an expert entrepreneur in the exploration and mining of natural sources from diamonds to base metals across Africa. As a leading independent diamond mining company, Petra is a key supplier of some of the most culturally significant stones, involving the sorting, mining, processing and sale of rough diamonds.
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