Gem News International Gems & Gemology, Spring 2025, Vol. 61, No. 1 Green Jadeite-Omphacite from Guatemala. Jennifer Stone-Sundberg, Aaron Palke, and Wim Vertriest ...

GIA CAMPUSES ARE WORLDWIDE. With schools in major gem and jewelry centers around the world, GIA campuses are exciting learning environments. From the bustle of Mumbai’s diamond trading center to the ...

GIA scholarship application cycle is from April 15 to May 15, 2023. To apply, click the button below to learn more. GIA-administered scholarships are available for GIA campuses worldwide. • Applicants ...

GEOLOGICAL SETTING. The island of Phu Quoc lies in the Gulf of Thailand, about 45 km off the southwestern coast of Vietnam. The island has an area of 574 km 2.The terrain consists mainly of low ...

CARLSBAD, Calif. – June 2, 2025 – Beginning later this year, GIA (the Gemological Institute of America) will start using descriptive terms to characterize the quality of laboratory-grown diamonds and ...

Aquamarine and heliodor are colored by Fe ions, an important coloring agent for beryl. Blue to yellow gem beryl was studied by quantitative spectroscopy and trace-element analytical techniques to ...

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 ...

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 22nd Street show, Carter Stay, owner and artisan behind Keycap Quarry (Salt Lake City, Utah), shared his unique craft with the author, opening up about what led him to pursue an alternative use ...

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 ...

This specimen represents one of the largest cultured pearls tested by GIA from the Pinctada maxima mollusk.Pinctada maxima is the largest species in the Pinctada genus, typically producing pearls ...