A recent rush in Madagascar yields new sapphire production.

Freeform fordite accumulated from a now-defunct method of painting automobiles was on display at Tucson.

一块帝王黄玉原石被雕刻成一颗精美的自由形态宝石。

A report from the International Colored Gemstone Association’s Gemstone Industry & Laboratory Conference (GILC), held in Tucson, Arizona on February 1, 2016.

A report on the HPHT growth of large, gem-quality colorless synthetic diamonds in China.

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

An emerald from a largely unexplored Chinese deposit is seen at Tucson, along with a pink sapphire recut after removal from a necklace.

The gemological properties of the first documented occurrence of red cordierite, from Madagascar, are examined.

A rare spinel, featuring a Star of David pattern and multiphase inclusions, is examined in Bangkok.

An overview of the 2016 gem shows.

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

A debris pattern within a rose quartz’s fracture resembles a dinosaur’s footprint.

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

A closer look at the Spectrum award-winning pendant from Nature’s Geometry.

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

A diamond’s inclusion, with a radiation stain shaped like a halo, is found to be monazite.

An unusual doublet consisting of two sections of natural emerald is examined the Tokyo lab.

An opal rough is immersed in water and treated with oil and Opticon to observe effects on transparency and play-of-color.

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

A synthetic spinel has undergone quench-cracking treatment, possibly to make it appear as a natural specimen.