A look at the gemological properties and chemical composition of this light blue to light green to green gem material, which is suitable for cabochon cutting.

Examines a collection of chrysoberyl samples from these sapphire placer deposits to determine their distinct mineralogical and chemical properties.

Lazulite crystals grow on and within a quartz specimen from Yukon Territory, Canada.

Optical properties in a taaffeeite are explored.

A round-cut specimen set in a ring is the first mounted CVD synthetic melee diamond identified by GIA.

Analysis of a 5.03 ct HPHT-grown blue synthetic diamond, the largest ever examined by GIA.

A detailed characterization of serpentine from this mountain locality, focusing on its use as a gem material.

A recent rush in Madagascar yields new sapphire production.

A parcel revealed to contain natural, treated, and synthetic diamonds reinforces the importance of identification.

Presents the underlying physics and methodology of this analytical technique, which has become an essential tool in identifying treated and synthetic diamonds.

A look at the resumed operations and new production of Kenya’s Scorpion tsavorite mine.

An overview of the 2016 gem shows.

Lesser-known gem materials are seen in pieces alongside a collection created as an artistic inheritance for future generations of jewelry fans.