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The authors examine the gemological properties and commercial potential of a new source of amber, discovered in 2020 on the Vietnamese island of Phu Quoc. It is the only known amber locality in ...

Many unusually large South Sea cultured pearls have been identified at GIA laboratories in the past (e.g., Fall 2013 Lab Notes, pp. 172–173; Summer 2023 Lab Notes, pp. 216–217). However, a recent ...

At the GJX show, Pillar & Stone (San Francisco, California) offered bright green jade from Guatemala, confirmed to range from jadeite to omphacite, that was highly translucent to nearly transparent.

GIA’s Bangkok laboratory received for identification a set of 35 loose non-nacreous pearls displaying a wide range of bodycolors including white, orange, pink, brown, purple, and black. The pearls ...

At the AGTA show, the author spoke with Brent Smith, owner of Phoenix Gems (Holly, Michigan), who shared a few parcels of rough spinel of different colors recently mined in Malawi. According to Smith, ...

Figure 2. Representative deep-UV fluorescence image of a 2.90 ct CVD diamond from Plasmability, collected using the DiamondView. The image is dominated by red–orange fluorescence from NV 0 centers, a ...

A remarkable large calcite recently seen at the GJX show displayed a dazzling array of colors resulting from both high dispersion and birefringence (C.S. Hurlbut and C.A. Francis, “ An extraordinary ...

About GIA An independent nonprofit organization, GIA (Gemological Institute of America), established in 1931, is recognized as the world’s foremost authority in gemology. GIA invented the famous 4Cs ...

In general, 2025 was a strong year for Tucson vendors at the various shows. Like last year, foot traffic was generally low with moments of high activity, while buying remained focused. Vendors who ...

In the jewelry world, innovation continuously drives the industry forward, with jewelry designers often at the forefront of the creative attempt. The author found two bangles exemplifying this ...

You’re in for a delectable treat with our Spring 2025 issue of Gems & Gemology! We cover detecting heated corundum, the rare and remarkable Winston Red diamond, and an extraordinary Renaissance jewel ...