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A group of rough sapphires encircle cut sapphires.

Article

Montana Yogo Sapphires’ Unique Gemology

Russell Shor

April 19, 2019

A look at the mining and distinguishing characteristics of this naturally vibrant blue sapphire.

A woman sits in front of a computer screen with the DiamondView to her right.

Article

Inside De Beers’ Lightbox Diamonds

Russell Shor

March 18, 2019

GIA researcher analyzes and confirms that De Beers’ Lightbox diamonds are grown using the chemical vapor deposition process.

Detail of pendant elements heart and palmette shows twisted wire details (probably cast) and granulation soldered on.

Article

A New Life for Revival Jewelry Styles: Archaeological, Renaissance and Egyptian

Sharon Bohannon

March 15, 2019

Revival jewelry is inspired from the past – and wearing it connects us to the rich history of the beginning of civilization.

Solution-Generated Pink Color Surrounding Growth Tubes and Cracks in Blue to Blue-Green Copper-Bearing Tourmalines from Mozambique

John I. Koivula, Kevin Nagle, Andy Hsi-Tien Shen, and Philip Owens

April 6, 2009

Several transparent, faceted, blue to blue-green copper-bearing tourmalines containing growth tubes and cracks surrounded by sleeves of pink color were examined for this report.

Strong Pinkish Purple Freshwater Bead-Cultured Pearls

Yixin (Jessie) Zhou and Chunhui Zhou

July 31, 2015

A necklace of Chinese freshwater bead-cultured pearls demonstrates the strides made in culturing techniques.

Article

Bows in Jewelry: The Finishing Touch in Giving

Sharon Bohannon

February 4, 2019

Bows have been a popular motif and finishing touch in jewelry and fashion from time immemorial, recurring and adapting to reflect the style of the era.

Sapphires from Australia

Terrence Coldham

September 1, 1985

An overview of Australia's recent significance in the production of blue sapphire.

Pinctada maculata pearls and mollusk shell

The Gemological Characteristics of Pipi Pearls Reportedly from Pinctada maculata

Nanthaporn Nilpetploy, Kwanreun Lawanwong, and Promlikit Kessrapong

February 1, 2019

Reveals the internal features and spectroscopic data of these small natural pearls and offers the means of separating them from pearls of related mollusk species.

General Gemology and Jewelry

December 4, 2018

Poster abstracts on “General Gemology and Jewelry” from GIA’s 2018 International Gemological Symposium.

New Technologies and Techniques

December 4, 2018

Poster abstracts on “New Technologies and Techniques” from GIA’s 2018 International Gemological Symposium.

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