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Figure 1. This 29.60 × 23.84 × 18.35 mm cluster of well-formed isometric fluorite and monoclinic geocronite crystals was recently discovered at the Milpo mine in Peru. Photo by Annie Haynes.

Quarterly Crystal: Geocronite in Fluorite

John I. Koivula and Nathan Renfro, August 4, 2023

A cluster of well-formed fluorite and geochronite crystals was recently discovered in Peru.

Figure 1. A 30.80 ct faceted quartz containing pinkish orange inclusions. Photo by Hongtao Shen; courtesy of Jinrui Dong.

Triplite Inclusions in Quartz from Yaogangxian, China

Qian Zhang, Xingtong Li, and Hongtao Shen, August 4, 2023

Pinkish orange crystal inclusions in a faceted quartz are identified as the rare phosphate mineral triplite.

GIA participates in two sustainability panels during the 2023 JCK Las Vegas show.

Sustainability Conference at JCK

Johanna Levy, August 4, 2023

GIA participates in two sustainability panels during the 2023 JCK Las Vegas show.

Figure 1. A 2.52 ct oval modified brilliant Paraíba tourmaline. Photo by Adriana Gudino.

Interesting Metallic Platelets in a Brazilian Paraíba Tourmaline

Shiva Sohrabi and Amy Cooper, August 4, 2023

Microscopic observation unveils the first known instance of skeletal metallic inclusions in Brazilian Paraíba tourmaline.

Brendan Laurs, Meg Berry, and Aaron Celestian at the Sinkankas Symposium. Photos by Judy Colbert.

2023 Sinkankas Symposium

GIA Staff, August 4, 2023

The Nineteenth Annual Sinkankas symposium, held at GIA’s Carlsbad, California campus, focused on gems and minerals of San Diego County.

Thread-like inclusions of serpentine resembling an ancient text. Photomicrograph by Le Ngoc Nang; field of view 2.50 mm.

Ancient Script-Like Serpentine in Brown Peridot

Le Ngoc Nang, August 4, 2023

Examination of a brown peridot xenocryst reveals thread-like serpentine inclusions resembling ancient text.

Pink Zektzerite

Jamie Price, August 4, 2023

A rare example of faceted gem-quality zektzerite is examined in GIA’s Carlsbad laboratory.

A 4.77 ct near-round white Tridacninae pearl exhibited an attractive sheen-like flame structure in a pattern resembling an eye when viewed in certain directions under a single white light source. Photomicrograph by Ravenya Atchalak; field of view 7.20 mm.

An “Eye” on a Tridacninae Pearl

Ravenya Atchalak, August 4, 2023

A Tridacninae pearl exhibits a flame structure resembling an eye.

Gemmes

GIA Staff, August 4, 2023

Swiss-based Gemmologie & Francophonie launches a new French-language digital publication.

Figure 1. An imitation emerald in the form of a chess knight measuring approximately 35.05 mm in height. Photo by Kristin Reinheimer.

Plastic Imitations of Emerald

Emily Jones and Abadie Ludlam, August 4, 2023

Two items submitted as emerald to the New York lab are identified as plastic manufactured products.

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