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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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Duncan Pay
Pink Diamonds, Russia’s Amber Room, and More…

An overview of the Winter 2018 Gems & Gemology content.

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Diamond from Jericho eclogite and Juina superdeep diamond
Diamonds from the Deep: How Do Diamonds Form in the Deep Earth?

G&G’s newest section explores how diamonds form in the deep earth.

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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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1.15 ct round brilliant diamond
Chart: Inclusions in Natural, Synthetic, and Treated Diamond

Provides a visual guide to the internal features of natural, synthetic, and treated diamonds.

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Suggested Reading on Diamond Inclusions

Suggested Reading on Diamond Inclusions

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Detail of the reconstructed Amber Room
The History and Reconstruction of the Amber Room

Chronicles the history of this cultural landmark, originally assembled for the Prussian king between 1701 and 1714, and its reconstruction by the Soviet Union starting in 1979.

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Color-change diaspore
The Color Origin of Gem Diaspore: Correlation to Corundum

Examines the color origin of color-change diaspore, known commercially as Zultanite, and compare the effectiveness of the chromophores it shares in common with corundum.

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Gray Corundum Coated by Black Spinel Layer
Corundum with Spinel Corona from the Tan Huong–Truc Lau Area in Northern Vietnam

Explains the reactions responsible for the formation of a well-developed reaction rim of spinel that surrounds the corundum core in some specimens from this deposit.

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The ring is designed with a wavy strip of black diamonds in the center framed on each side with colorless diamonds set in a ruffled edge The earring are crescent shaped with black diamond on the inside framed by colorless diamonds in a ruffled edge.
Article
GIA Researchers Look Inside Black Diamonds

Black diamonds are striking in jewelry. GIA researchers report on the unique properties used to identify black diamonds and the potential treatments.

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