Amber and its treatments: A New Baltic Amber Classification Chart
Costanzo A., Klikowicz-Kosior A., Kosior M.
Bertrandite in Emeralds
Over the past few years we have been seeing more and more lower quality stones in the lab. The reaso
Morphologies and Surface Features of Diamond Samples from Southern Thailand
In 1955, the first report on Thai diamond was made by Dr. Payome Aranyakanon, a renowned tin explora