Gemstones in the Era of the Taj Mahal and the Mughals (英语)
A look at the gem ornamentation of this landmark, as well as the jewels of the Mughal dynasty.
A Near-Round Natural Pearl Discovered in the Edible Oyster Magallana bilineata
An edible oyster from the Hab River Delta of Pakistan reveals a natural pearl.
Faceted Diamond Octahedron with a Remarkable Stellate Cloud Inclusion
A remarkable inclusion scene in diamond is showcased by an unconventional cutting style.
Gemstone Portrait Artist Angie Crabtree
The 2019 AGTA show in Tucson featured the work of a gemstone portrait artist.
The Rare Sun Diamond
An eye-visible cloud with a star-like pattern is highlighted by the cut of the Rare Sun diamond.
Characteristics of Hydrothermally Treated Beeswax Amber
Reveals the process for hydrothermal enhancement of amber and the means of detection.
Quarterly Crystal: “Ball Bearing” in Quartz
Quartz crystals with three-phase fluid inclusions from the Jinkouhe mine in the Sichuan Province of China have been sold for many years at gem and mineral shows such as those held annually in Tucson, Arizona.
Possible Natural Abalone Shell Blister
An intriguing item was sent by KC Bell to GIA’s Carlsbad laboratory for examination.
Black Non-Nacreous Pearl Imitations Made of Beads Cut from Shell
The DANAT laboratory recently encountered two natural black color beads cut from an unknown mollusk.
Resin Imitation Ivory with a Pseudo “Engine-Turned” Structure
Resin materials marketed as imitation ivory were recently acquired by a GIA gemologist.
Laboratory-Grown Sapphire with Unusual Features
The Hong Kong laboratory recently examined a 14.36 ct pink-orange cushion mixed-cut specimen.