Blue sapphire from Malacacheta of Minas Gerais, Brazil
Masaki Furuya
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
Novel cultured pearls with ceramic nucleus and possible cause of their strong luster
Cultured pearls with a ceramic nucleus (bead) represent a new type of saltwater cultured pearls that