A brooch adorned with 49 East African Gems was on display at the AGTA show.

An observed inclusion association pattern may provide a new perspective on the origin of curved inclusions in rhodonite.

GIA’s Mumbai laboratory studies a lot consisting of 40 pearls to aid in distinguishing natural from non-bead cultured pearls.

Rare green amber from the Amhara region of Ethiopia was available at the Pueblo Gem & Mineral Show.

An investigation using PL spectroscopy to identify chromium-bearing red gemstones.

Obsessed Over Gems offered an array of unheated Montana sapphires in a range of hues, cuts, and sizes at the AGTA show.

A look at newly found Kashmir sapphire exhibited at the AGTA show.

The New York laboratory reports on the cause of color in a Fancy Light grayish blue diamond.

An emerald displaying dual-color light green and white double chatoyancy is examined in the Tokyo laboratory.

GIA’s New York laboratory reports on a submission of two pearl necklaces containing large, intensely colored cultured pearls with unique bead nuclei.

An orangy yellow pearl featuring a unique acicular feature is examined at the Mumbai laboratory.

Two diamonds analyzed in the New York laboratory lead to a newly identified cause of orange color.

A baroque-shaped shell blister is examined at the Mumbai laboratory.

Examination of a purple sapphire reveals a zigzag-patterned fingerprint and negative crystal resembling a butterfly.

An octahedral fluorite crystal is observed in Brazilian alexandrite.

Whitish hairlike inclusions are present throughout a 3.55 ct benitoite.

Illumination under the microscope reveals iridescent healed fissures in a yellowish brown epidote.

A Y-shaped channel with finer branches indicates parasitic activity in a natural saltwater pearl.

Radial limonite displays bright interference colors in a surface-reaching fracture of a violet sapphire.

Fire agate from Mexico displays a random weblike pattern.