Gemologists at Bangkok’s Lotus Gemology recently received a 6 ct ruby for identification. Declared to…
Emeralds are known to have natural cracks or fractures. The filling of surface-reaching fractures with…
The selling of simulants and synthetics mixed with parcels of natural stones is an old…
New technologies are increasingly being applied to cultured pearls, and it is exciting to witness…

Recently, the authors examined a 2.01 ct Faint green round brilliant diamond with a fascinating diamond crystal inclusion that displayed a transparent, ghost-like appearance. Due to the large size of this nearly…
The authors recently examined a 5.19 ct type IIa natural diamond (figure 1) displaying numerous…