A diamond octahedron from South Africa hosts a rare yellow-orange almandine-pyrope garnet crystal.

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

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

A euhedral prismatic pargasite crystal is identified in pink spinel.

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

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

Examination of a 1.34 ct ruby reveals a unique inclusion formed during heat treatment.

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

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

Gersdorffite inclusions in quartz exhibit either triangular or hexagonal shapes when viewed from different directions.

Blue needle-like inclusions are analyzed in three quartz spheres.

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

A non-nacreous pearl with a netted surface resembles the exterior of a melon.

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

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

Play-of-color pattern in Ethiopian opal is reminiscent of a turtle’s shell.

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

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

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

A 37.41 ct natural rough diamond with distinct pink and colorless zones is examined at GIA’s Botswana laboratory.