The Tokyo lab recently identified a unique localized distribution of cloud-like inclusions in a chrysoberyl.

Nacreous pearls are known to have platelet growth resembling fingerprints or topographic maps, but a less common appearance is nacre with a concentric spiral pattern.

Contributes to the mining history of Austria’s Habachtal region, which is believed to be one of the earliest emerald deposits.

The Carlsbad lab received a rhodochrosite cabochon featuring rhomboid-shaped fluid inclusions, causing a four-rayed star.

Unique diamond- and emerald-lensed spectacles from the Mughal Empire were tested in GIA’s New York laboratory.

Remarkable “horsetail” inclusions discovered in a demantoid garnet, while their origin and composition remain under discussion.

Examines the mining and the internal, spectroscopic, and chemical features of peridot from this deposit, which possesses a rich olive green color and is available in large sizes.

GIA’s New York laboratory reports a new record size for CVD laboratory-grown diamond.

A group of large, high-quality CVD material demonstrates the continued challenge of identifying laboratory-grown gems.

A selection of 74 non-bead cultured and 12 bead cultured pearls grown in cultured pearl sacs and harvested directly from operated mollusks were collected and their internal structures examined using real-time microradiography and X-ray computed microtomography analyses.

A colorless topaz from Nigeria hosts the only known example of willemite as an inclusion in topaz.

A study on heat with pressure treatment of blue sapphires reveals FTIR patterns associated with different iron concentrations.