Gemological Characteristics of New Transparent Brown Sapphire
Sutas Singbamroong, Tasnara Sripoonjan, Montira Seneewong Na Ayutthaya, Pukkapon Piantumdee, Tanyawit Sutipanya, Khaled Hussein and Nazar Ahmed
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