Research Article Search Results

A delicate, ethereal necklace depicting a diamond butterfly caught in a gem-studded spider’s web won the third annual Gianmaria Buccellati Foundation student jewelry design contest.

Unusually large top-quality faceted Russian demantoid garnets with the characteristic lovely green to yellowish green color excite attention at the Tucson GJX show.

A rare Burmese star peridot cabochon is characterized by a soft four-rayed asterism and extremely fine acicular inclusions.

A transparent supply chain and the education of artisanal miners were two of the many topics discussed at Tucson’s first Ethical Gem Fair.

Green nephrite deposits are found at many locations around the globe, with British Columbia, Siberia, and northwestern China as the leading producers.

Advanced analytic techniques are critical for separating Ethiopian feldspar from Oregonian and copper-bearing feldspar with undetermined color origin.

Chrysocolla-in-chalcedony, also known as gem silica or blue chalcedony in Taiwan, is the most valuable chalcedony variety on the Taiwanese market.

The Bangkok laboratory recently examined a pearl containing a laminated shell bead nucleus with mysterious properties.

This year at the AGTA show, the number of booths selling skillfully carved, fantasy cut, or expertly recut items was noticeably higher than in past years.

In early February, despite the early phase of the COVID-19 outbreak, the Tucson shows were well attended and sales were brisk.

In some cases, the value of a sapphire depends strongly on its geographic origin. This article details the origin data GIA has collected for blue sapphire and describes its methodology for using the data in geographic origin determination.

A look ahead to the future of geographic origin determination.