Research Article Search Results

Plastic Deformation: How and Why Are Most Diamonds Slightly Distorted?

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Spectacular Yellow Sapphire from Sri Lanka

160 ct yellow sapphire rough from Sri Lanka.

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YAG with Flux-Filled Fingerprints

The author recently examined a 3.58 ct yellowish green yttrium aluminum garnet, a manufactured product known in the trade as “YAG,” that contained numerous large flux-filled fractures.

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New Emerald Locality in Southern California

Located about 60 miles east of San Diego, a new emerald deposit has been discovered in the Julian Mining District.

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Vibrantly Colored Gems

Bill Larson of Pala International reports a very strong AGTA Tucson show.

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An Interesting Rose Quartz from Madagascar

A new find of rose quartz from Madagascar contained some unusual inclusions.

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“Diffusion Ruby” Proves to be Synthetic Ruby Overgrowth on Natural Corundum

A relatively new production of red corundum, reportedly from Bangkok, has been offered for sale in recent years.

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Microscopic Shells in Natural Pearls from Pinctada radiata

Two pearls from Bahrain containing minute shells are examined at GIA’s Mumbai laboratory.

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“Electronic Device” in an Atypical Bead Cultured Pearl

GIA’s Hong Kong laboratory looks at a new radio-frequency identification (RFID) technology for tracking cultured pearls.

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The First Identified Non-Nacreous Beaded Cultured Pearl

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Demantoid Garnet with Giant Fluid Inclusion

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Plastic Amber Imitation in a Rosary

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