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A group of rough sapphires encircle cut sapphires.
Article
Montana Yogo Sapphires’ Unique Gemology

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

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A woman sits in front of a computer screen with the DiamondView to her right.
Article
Inside De Beers’ Lightbox Diamonds

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

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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

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

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

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.

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Bead-cultured pearl necklace from China
Strong Pinkish Purple Freshwater Bead-Cultured Pearls

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

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A bow brooch with long ribbon tendrils.
Article
Bows in Jewelry: The Finishing Touch in Giving

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.

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Sapphires from Australia

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

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Pinctada maculata pearls and mollusk shell
The Gemological Characteristics of Pipi Pearls Reportedly from Pinctada maculata

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.

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Victorian Whitby jet
General Gemology and Jewelry

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

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Sintered zirconia necklace
New Technologies and Techniques

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

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