An update on the activity at Potentate’s Montana deposits.

Establishes a metamorphic origin for sapphire samples from these deposits, supported by their trace-element composition and inclusion characterization, including the age dating of zircon inclusions.

Jeff Hapeman of Earth’s Treasury (Westtown, Pennsylvania) loves a gemstone with a good story.

The examination of a nearly complete trapiche emerald crystal–which are difficult to obtain–is consistent with the findings of previous studies.

A composite of synthetically grown and natural diamond was recently identified by the Carlsbad laboratory.

Eye-catching stones at Jeffrey Bilgore’s AGTA booth.

The third Jewelry Industry Summit, held in Tucson February 2–3, revealed the successful implementation of several initiatives mapped out since the conference’s inception in 2016.

A wholesaler supplying the bridal market with recycled gemstones and antique cuts shares his thoughts on the market and on responsible practices.

Investigates trace-element chemistry of freshwater natural pearls from North America and China with LA-ICP-MS and uses LDA to identify their origins.

The Carlsbad lab identifies a color-change Burmese sapphire with a unique chemistry profile.

Shows how alexandrite’s color and color change are affected by cut and the orientation of table facets.

In recent years, the colored stone world has seen a growing appetite for unusual colors.