Amber from the Thanbaya Gaing Coal Mine, Minbu Township, Magwe Region, Myanmar
Tin Nyunt Thet, Thye Sun Tay, Lwin Soe, Lock Cheyenne et Hui Ying Loke
Gemological Characteristics of New Transparent Brown Sapphire
A newly observed variety of faceted transparent brown sapphire has recently entered the gem market,
Padparadscha Sapphire & heat treatment
In 2018 the Padparadscha engagement ring of Princess Eugenie (Figure 1), the niece of the king, gave
Bertrandite in Emeralds
Over the past few years we have been seeing more and more lower quality stones in the lab. The reaso