Amber and its treatments: A New Baltic Amber Classification Chart
Costanzo A., Klikowicz-Kosior A., Kosior M.
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
Gems in Greece: Geology, mineralogy and crystallizing environment
In the accretionary Hellenides Orogen, gems occur in various rock types of mainly four tectonometamo