Large blue and pink diamonds were among the top lots of the fall auction season, including the most expensive auction jewel of 2023.

Several G&G contributors are recognized for their work on the latest volume in the Reviews in Mineralogy & Geochemistry series.

The most important source of yellow gem elbaite is the Canary mining area in the Lundazi District of eastern Zambia.

An review of the Oregon sunstone seen at the Tucson gem shows.

A look at JTV’s history, current activities, and impact on the industry.

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

Alexander Arnoldi explains the strategy of Arnoldi International and provides an update on some new high-quality materials.

An overview of the 2018 Tucson gem shows.

Renowned designer Paula Crevoshay discusses artistic influences and her latest creations.

New developments relating to the Winter 2016 article on synthetic emeralds grown by Prof. Richard Nacken.

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

Eye-visible inclusions are common in almost all quartz varieties except rose quartz.

Freshwater pearls are the subject of GIA’s latest research involving the DNA barcoding and next-generation sequencing of biogenic materials.

One-of-a-kind gemstone keycaps for mechanical keyboards were exhibited at the 22nd Street show.

A new find of fluorite from Nigeria was exhibited at the Pueblo show.

Researchers of the Tairus joint venture have developed the technology for the hydrothermal growth of gem-quality crystals of synthetic sapphire.

Two flame-fusion synthetic sapphires with a Paraíba-like color are examined at GIA’s Carlsbad lab.

Examines the sources, color, texture, and chemical composition of jadeite from Japanese deposits.

A Queen conch shell bead is submitted for pearl identification to the Mumbai laboratory.

Strong linear brown zoning is observed in a Fancy Dark yellow-brown diamond.