An overview of the Winter 2022 Gems & Gemology content.

A successful spring season set high expectations for colored diamonds at auction in late 2022.

A bluish green omphacite crystal is discovered in a Fancy brown-pink diamond.

The Gemological Institute of America (GIA), the leading gemological grading and identification organization, is now offering a lower-cost GIA Laboratory-Grown Diamond Report - Dossier.

The Gemological Institute of America (GIA), the leading gemological grading and identification organization, is now offering a lower-cost GIA Laboratory-Grown Diamond Report - Dossier.

The start of 2023 marks a significant milestone in the digital transformation of the global diamond industry - the launch of the fully digital GIA Diamond Dossier, the most widely available diamond grading report in the world.

A lab in Bangkok shares study on color stability in yellow sapphire.

Crystal inclusions in a natural diamond resemble a unique scene.

GIA, the leader in gemological education, research and science-based gem identification and grading services, is revamping the GIA Graduate Jeweler program in collaboration with master goldsmith and award-winning jewelry designer Alan Revere.

During routine color stability testing of sapphires, GIA experts observed an unusual gain of orange or yellow coloration to a padparadscha-like color or even to pure orange.

100 GIA researchers, leading academics, independent industry experts and GIA Governors and executives met in person and virtually at GIA’s global headquarters in Carlsbad, Calif., November 1-3 for the Institute’s 16th annual research meeting.

At their recent Board meeting at the Institute’s California headquarters, the GIA Board of Governors welcomed two new Governors, new Chair and Vice Chair of the Board, and said goodbye to four departing members.

The Tokyo laboratory examines a Paraíba tourmaline with chatoyancy caused by copper inclusions.

The Mumbai laboratory finds a fraudulent GIA inscription on synthetic moissanite.

Numerous negative crystals in a pear-shaped quartz host brightly colored purple liquid.

A detailed spectroscopic investigation of the color of pink spinel reportedly from the Kuh-i-Lal deposit in the Pamir Mountains of Tajikistan.

Explores the use of gem materials as pigments in works of art, from the earliest cave paintings to the modern era.

A report on the examination of “gel-filled” turquoise produced in Zhushan County in Hubai Province, China.

Each level of the vertical Hidden Gems exhibit offers a different theme at the San Diego Natural History Museum.

The life of one of Australia’s leading opal authorities is remembered.