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

Diamond inclusions are relatively common guests in diamond crystals.

A freely moving diamond crystal completely enclosed in a diamond from Siberia gets its name from the famous Russian nesting dolls.

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.

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

Investigates the chemical, physical, and gemological properties of attractive rhodonite-rich rocks from this Swiss deposit.

Picturesque beaches and lush green jungles are not the only attractions that make Bali the most popular tourist destination in Indonesia.

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.

Chrysocolla-in-chalcedony, also known as gem silica or blue chalcedony in Taiwan, is the most valuable chalcedony variety on the Taiwanese market.

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

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

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

Orange crystal inclusion identified as the rare mineral triplite in a beryl from Pakistan.

GIAの卒業生、Franco Valobraが、命を救うために新型コロナウイルスと最前線で闘う医療従事者に感謝の気持ちを表して記念のピンを制作します。

「光のパフォーマンス」という用語は、ダイヤモンド業界で漠然と使われていますが、実際にダイヤモンドを見ているとき、どのような意味があるのでしょうか?

「光のパフォーマンス」という用語は、ダイヤモンド業界で漠然と使われていますが、実際にダイヤモンドを見ているとき、どのような意味があるのでしょうか?