Gemstones formed in metamorphic environments offer insights into the earth’s history and the evolution of tectonic activity that led to their formation.

Analysis of internal structures in non-bead cultured pearls submitted to GIA’s Mumbai laboratory.

Examination of a natural diamond reveals graining and zoning that resemble those of a laboratory-grown CVD diamond.

Two pearls representing Indian deities were recently examined in the Mumbai laboratory.

Examination of natural pearls from Kuwait reveals one with a suspected metal oxide at the core.

A hexagonal platelet of graphite is discovered in a pink sapphire from Sri Lanka.

An overview of the Summer 2023 Gems & Gemology content.

Gemstones formed in metamorphic environments offer insights into the earth’s history and the evolution of tectonic activity that led to their formation.

The quality and size of this 4.04 ct CVD-grown diamond ring demonstrate the advancing technology in laboratory-grown diamonds.

After a slow start, the spring 2023 auction season ends with multiple broken records.

GIA, the leading institute for research into diamonds, colored stones and pearls, recently evaluated a diamond ring cut from a single laboratory-grown diamond.

GIA, the leading institute for research into diamonds, colored stones and pearls, recently evaluated a diamond ring cut from a single laboratory-grown diamond.

41 leaders from every global gem and jewelry sector gathered recently for a transformative educational experience at the 2023 GIA Global Leadership Program at Harvard Business School (HBS)

41 leaders from every global gem and jewelry sector gathered recently for a transformative educational experience at the 2023 GIA Global Leadership Program at Harvard Business School (HBS)

“Understanding our impact on the environment, societies and communities in which we operate is integral to our important consumer protection mission,” said GIA President and CEO Susan Jacques, speaking about the launch of the first GIA sustainability report on Friday, June 2, at the JCK Las Vegas show.

“Understanding our impact on the environment, societies and communities in which we operate is integral to our important consumer protection mission,” said GIA President and CEO Susan Jacques, speaking about the launch of the first GIA sustainability report on Friday, June 2, at the JCK Las Vegas show.

The recent successful field-test of an innovative system for mercury-free processing of gold ore is a significant advancement in the important effort to safeguard the health and safety and improve economic outcomes for artisanal, small-scale gold miners (ASGM) and their communities.

Examination of a gem-quality aquamarine crystal reveals an inclusion cluster presumed to be columbite.

A partially exposed orange garnet inclusion with surrounding fractures resembles a flying insect in a brownish yellow diamond.

Bill and Carl Larson share details about new tourmaline pocket discoveries at the Tourmaline King mine.