A unique inclusion scene caused by devitrification is observed in artificial glass.

Examination of a Fancy Deep brownish orangy pink diamond reveals evidence of treatment to enhance its color.

Natural pearl cores are used to simulate the appearance of natural pearl growth in two assembled pearls mounted in a pair of earrings.

Clusters of micro-inclusions form starburst-patterned clouds in a 2.50 ct Faint yellow-green round brilliant diamond.

The Carlsbad lab receives a laboratory-grown colorless sapphire with weblike fractures containing concentrations of dye.

A 63.17 ct dumortierite rough crystal is examined in the Bangkok laboratory.

A 2.50 ct natural type IIa/IaB diamond submitted to the Dubai laboratory shifts to type IIb after deep-UV excitation.

GIA’s Tokyo laboratory examines three grossular garnets displaying six-rayed black inclusions arranged in a snowflake-like pattern.

An eight-rayed star peridot with a star system made up of two different sets of inclusions is described for the first time.

A study analyzing the thermal behavior of the 3161 cm^–1 IR feature in 10 natural corundum samples from various deposits.

A combination of growth and dissolution features contribute to a yellow diamond’s unique shape.

A diamond ring from a claw game in Japan is analyzed.