Inclusions resembling snowflakes, and hues of many colors, are two characteristics seen in fine-quality jadeite specimens on offer at the Tucson gem show.

This year at the AGTA show, the number of booths selling skillfully carved, fantasy cut, or expertly recut items was noticeably higher than in past years.

On February 5, 2020, Gems & Gemology launched a Facebook group dedicated to gemology and research published in the journal.

Unusually large top-quality faceted Russian demantoid garnets with the characteristic lovely green to yellowish green color excite attention at the Tucson GJX show.

Green nephrite deposits are found at many locations around the globe, with British Columbia, Siberia, and northwestern China as the leading producers.

Mina Stones promotes Nigerian gems including rubellite and sapphire as well as reviving traditional skills and symbols in the creation of original jewelry.

Untreated Russian emeralds, rarely seen in the market, demonstrate a range of color and degree of fineness.

Advanced analytic techniques are critical for separating Ethiopian feldspar from Oregonian and copper-bearing feldspar with undetermined color origin.

A delicate, ethereal necklace depicting a diamond butterfly caught in a gem-studded spider’s web won the third annual Gianmaria Buccellati Foundation student jewelry design contest.

The unusual six-rayed trapiche pattern, identified mainly with Muzo emeralds, has also been discovered in Mogok sapphires and Mong Hsu rubies.

In early February, despite the early phase of the COVID-19 outbreak, the Tucson shows were well attended and sales were brisk.

The Bangkok laboratory recently examined a pearl containing a laminated shell bead nucleus with mysterious properties.

A nondestructive rapid screening technique uses fluorescence spectroscopy to identify treated colored pearls.

An overview of the Spring 2020 Gems & Gemology content.

关于 Cullinan Diamond（库利南钻石）的加注文献清单

关于蓝锥矿的加注文献清单

GIA 毕业生打造纪念别针，以表彰正在抗击新冠病毒的医护人员。

在钻石贸易中，“光效应”一词广为使用，但实际观察钻石时，“光效应”到底指的是什么？