CVD 合成钻石不寻常的 DiamondView 图片 (英语)
Deep blue fluorescence in a CVD synthetic diamond mimic patterns found in natural specimens.
香港鉴定所鉴别出超过 1 克拉的圆形 CVD 合成钻石 (英语)
Advances in CVD growth technology have resulted in crystals that yield well-proportioned round brilliant cuts.
Titanium-Coated Tanzanite
For the first time, GIA's laboratory has examined tanzanite color-coated with titanium.
Assembled “Pearl” Filled with Wire
Microradiography reveals wire fillings within a “pearl” created from two separate specimens.
Fancy Black NPD Synthetic Diamond
UV-Reactive Opal
The first documented UV-reactive chemical treatment to make opal appear tenebrescent.
.jpg "YMAL GIA Ed")
