Jürgen Schütz discussed the opal sourcing and cutting activities of the German firm Emil Weis.

John Woodmark provides an update on the Ponderosa sunstone mine in Oregon.

Rex Guo describes how he sources and systematically recuts faceted stones to unlock their inner beauty.

Jean Claude Michelou shares his perspective on supply chain transparency and beneficiation in source countries.

A report on turquoise from the only known U.S. deposit outside of the Southwest.

Margit Thorndal of Madagascar Imports offers her perspective on the colored stone market.

The Responsible Jewellery Council (RJC) has announced plans to include colored stones and silver in the next revision cycle for its Code of Practices, which RJC members are certified against.

Alexey Burlakov shares insights on the current production of Russian demantoid and emeralds.

Stephan Reif explains the mine-to-market approach at the largest continuously operating demantoid deposit.

A selection of very small akoya cultured specimens demonstrates the challenges gemologists face when determining pearl origin.

Bill Larson of Pala International reports a very strong AGTA Tucson show.

Luis Gabriel Angarita and Edwin Molina share their experiences and perspective on the Colombian emerald industry.

A bright green chromium diopside inclusion is seen in a diamond from South Africa's Kimberley mine.

Rare dissolution etch channels are seen in a natural diamond.

Two yellow sapphires yield surprising green inclusions.

The GIA lab examines five gem-quality CVD-grown diamonds in sizes that reflect the improving technology of the synthetic gemstone industry.

An HPHT-treated round brilliant diamond with an inscription that presents as a GIA report number is found to be inconsistent with the institute's report, previously issued for an untreated diamond.

The examination of two unusual garnets results in identifications issued for the first time in GIA's colored stone report records.

The material used to fill a large fracture in a diamond yields an unexpected iridescence under two different illuminations.

Characterizes diamonds with exceptionally rare natural green color, based on GIA’s extensive database of samples.