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Bursts of yellow and purple radiate throughout this round cut amertrine.
Article
Colorblocking: The Art and Fashion of Multicolor Gemstones

The fashion trend of colorblocking can be found in the artistic combinations of color in multicolor gemstones known for their color zoning or banding.

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Diamond octahedron, diamond bort, and carbonado
Carbonado Diamond: A Review of Properties and Origin

Presents a detailed examination of about 800 samples of carbonado diamond from Brazil and the Central African Republic, including possible models for its genesis.

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Article
Pyrope Garnet and Montana Sapphires Highlight Winter 2015 G&G

G&G Brief presents an overview of the content of the Winter 2015 issue of Gems & Gemology.

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Evan Smith studies images of diamond inclusions on a computer.
Article
Postdoctoral Program Gives Scientists Access to Rare Research Opportunities

GIA’s postdoctoral program gives researchers access to gemological data, equipment and rare, unusual and large gems in its laboratories.

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Chipped Diamond
Article
How to Protect Your Diamond from Chipping

Learn more about what causes a diamond to chip, and 8 tips on how you can avoid chipping your diamond.

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Indian necklace
Article
Jewelers to the Maharajas of Jaipur and Modern-Day Moguls

Enter a world not well-known in the West—the world of the maharajas and their jewelry, coveted by the modern-day moguls of business, entertainment, and royalty. See the fantastic works of art made today in the form of enameled Kundan meena jewelry and the regal look of polki diamonds.

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The Wittelsbach-Graff and Hope Diamonds: Not Cut from the Same Rough

Two historic blue diamonds, the Hope and the Wittelsbach-Graff, appeared together for the first time at the Smithsonian Institution in 2010.

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DiamondView Imaging of the Pavilion Facets
Pseudo-Synthetic Growth Structure Observed in Natural Diamond

This stone was a good example of a very rare natural diamond exhibiting synthetic growth characteristics.

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Gem-Quality Synthetic Diamonds Grown by a Chemical Vapor Deposition (CVD) Method

Brown-to-gray and near-colorless single-crystal type IIa synthetic diamonds grown.

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An Update on Sumitomo Gem-Quality Synthetic Diamonds

Both crystal morphology and size can greatly affect the properties observed in a synthetic diamond.

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