Spring 2014 - Volume 50, Issue 1
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Titanium-coated tanzanite
Titanium-Coated Tanzanite

For the first time, GIA's laboratory has examined tanzanite color-coated with titanium.

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G-Color CVD Synthetic Diamond
CVD Synthetic Diamond with Unusual DiamondView Image

Deep blue fluorescence in a CVD synthetic diamond mimics patterns found in natural specimens.

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Milky white opals
UV-Reactive Opal

The first documented UV-reactive chemical treatment to make opal appear tenebrescent.

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Fancy black NPD synthetic diamond
Fancy Black NPD Synthetic Diamond

Testing reveals the first synthetic nano-polycrystalline diamond (NPD) to be detected by a gem lab.

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Baroque pearl with suspect ring
Assembled “Pearl” Filled with Wire

Microradiography reveals wire fillings within a “pearl” created from two separate specimens.

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CVD Synthetic Round Brilliant
Round CVD Synthetic Diamond Over 1 Ct Identified in Hong Kong Lab

Advances in CVD growth technology have resulted in crystals that yield well-proportioned round brilliant cuts.

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