Dramatic color-fluorescing areas in a sword-shaped diamond give rise to the nickname “Fire and Ice.”

Reports on a visit to a shell nucleus manufacturer and two pearl farms in northern Vietnam, which is emerging as a notable producer.

The Carlsbad laboratory received for examination two dark-colored bead cultured pearls embedded with an electronic device from Jeremy Shepherd, CEO of Pearl Paradise.

An emerald from the Swat Valley manifests its growth in three distinct steps, identifying it as “trapiche-type.”

加利福尼亚州卡尔斯巴德 — 2021 年 1 月 21 日 — 注册参加 GIA 宝石知识周：春姿绽放。本次激动人心的虚拟活动为期四天，带您遨游有色宝石的美丽世界。

近日，GIA 纽约鉴定所有幸检验了一颗迷人的珍珠，它的故事更加引人入胜，快来一探究竟吧。

Annotated reading lists compiled on Lazurite (Lapis Lazuli) from Afghanistan and its Artistic Use as a Blue Pigment (Ultramarine)

An overview of the Summer 2020 Gems & Gemology content.

Whimsical windmill-like inclusions are found in a high-quality orange specimen of the rare mineral sphalerite.

Lotus Gemology in Bangkok received a large parcel of dark red spinels for identification.

Mineral and fluid phases within negative crystals in metamorphic sapphires provide us with general information on the sapphire and the trapped fluid itself.

Rubies from Mozambique, which were examined at the Lotus Gemology lab in Bangkok, proved to be infilled with böhmite, a secondary mineral in corundum.

Researchers from De Beers Group Technology present a technique that expands on the surface luminescence used in the DiamondView instrument to provide additional imaging information and quickly distinguish colorless or near-colorless natural diamond from laboratory-grown diamond.

Presents a study that suggests optically brightened pearls can be consistently separated from non-brightened pearls using fluorescence spectroscopy.

Presents the four major groups of defects responsible for the color in nearly all yellow and orange diamonds.

Many legends are told about the history of the Chivor emerald mine.

Raman spectroscopy confirms sea-blue beads with a similar appearance to Larimar are actually quench-crackled chalcedony.

A rough diamond crystal weighing 4.05 ct was observed with radiation staining on its surface.

Examines the effectiveness of hydrogen and oxygen isotopes in discriminating dolomite-related nephrites from the four most important occurrences worldwide.

There’s only one place on earth where the general public can prospect for diamonds directly from a primary kimberlite pipe: Crater of Diamonds State Park.