Large, clean citrine reportedly from the Kitwe deposit in Zambia is a welcome addition to the gem market.

Synthetic overgrowth caused by two different types of treatment are found on two samples in the Tokyo lab.

A GIA student from the London campus receives recognition for a necklace design featuring baroque pearls, diamonds, and light pink garnets.

An iridescent partially healed fissure is observed in a blue sapphire from Sri Lanka.

Play-of-color patches in black opal display interesting written character patterns.

Two strongly orangy pink morganites with residual radioactivity were studied.

An overview of the Summer 2024 Gems & Gemology content.

A large “Persian” turquoise cabochon was impregnated with a material that was also present in cavities on its base.

An emerald deposit at Byrud, in southern Norway, yielded significant quantities of crystals and gem rough in the late 19th and early 20th centuries.

An unusual mite is preserved in a 30-million-year old amber specimen.

Suggested Reading on Sapphires and their Inclusions

A newly found deposit of sapphire in Madagascar is explored.

Synthetic moissanite is much closer to diamond in overall appearance and heft than any previous diamond imitation; this article reports on how to identify and characterize it.

Suggested Reading on Emeralds and their Inclusions

Examination of a faceted rock crystal backed by a slice of turquoise—an obvious but unusual combination of gem materials.

A summary of the article “A simple approach to separate natural from synthetic ametrine,” by Francine Payette.

Suggested Reading on Diamond Inclusions

In 2006, emeralds were discovered in the Fazenda Bonfim region of northeastern Brazil.