A survey of the current gemological knowledge of pegmatites, including the gem varieties aquamarine, tourmaline, and topaz.

First in a series, this article reviews the exploration for gemstones and mining methods in Minas Gerais, Brazil.

Documents a visit to the sapphire, opal, and emerald mining and trading areas of Ethiopia.

“Rainbow” andradite from Nara, Japan, occurs as relatively small orangy brown crystals that show attractive iridescence in almost the entire range of the spectrum.

Dave Bindra shows some noteworthy pieces he obtained on the secondary market and shares his thoughts on the state of the colored stones market.

Michael Dyber discusses his approach to gem carving.

An overview of the 2018 Tucson gem shows.

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

The Jewelry Development Impact Index (JDI), one of the initiatives from the second Jewelry Industry Summit in January 2017, has become the flagship project of the Minerals, Materials and Society (MMS) program at the University of Delaware. Patricia Syvrud, development manager of MMS, discussed the program, which she calls a “road map to responsibility.”

A report from the 37th IGC, held in late October 2023 in Tokyo.