Unusual types of opal are seen at the Pueblo Show in Tucson.

内容摘要详见《宝石与宝石学》(Gems & Gemology) 2016 年夏季刊。

Review of If These Jewels Could Talk: The Legends Behind Celebrity Gems, by Beth Bernstein.

Five large HPHT synthetic diamonds, examined at GIA’s Hong Kong lab, indicate the advances HPHT growth technology has made in quality and size.

Located near the Arctic Circle, Diavik is one of the world’s richest diamond deposits and a leader in sustainable mining.

A quartz double cabochon showcases a garnet placed to imitate an inclusion.

Boulder opal in sandstone matrix is seen as beads in Tucson.

Testing identifies a new treatment method as the cause of color in beeswax amber.

The first triplite inclusion in a topaz host is examined.

Master cutter Kiwon Jang demonstrates his newest cutting machine at Tucson’s AGTA show.

A first-person account of cutting a 3,019 ct piece of white opal to create a 1,040 ct gem with play-of-color across the surface.

Hardstone figures of two Russian imperial bodyguards, commissioned in 1912 by Nicholas II, demonstrate the House of Fabergé’s meticulous detail and craftsmanship.

Sapphires from Russia’s Ilmen State Reserve may provide insight into gem corundum from secondary placers.

Inclusions in technogenic ruby slag help to separate this material from other specimens, both natural and synthetic.

Chronicles the famed emerald source through the adventures of Peter W. Rainier, who directed the mine from 1926 to 1931 and restored its former glory.

Blisters examined in the Bangkok lab have been treated with an artificial filler.

Iridescence is seen in a porcelaneous pearl examined at the Carlsbad laboratory.

Examines the challenges of ethical sourcing and production of colored stones, and what some industry leaders are doing to address the situation.