Identification of “Pistachio” Coloured Pearls Treated by Ballerina Pearl Co.
Chunhui Zhou, Joyce Wing Yan Ho, Sally Chan, Jessie Yixin Zhou, Surjit Dillon Wong, and Kyaw Soe Moe, April 28, 2016
A report on the colour treatment process for these intensely greenish yellow to yellowish-green cultured pearls and the techniques for identifying them.
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Nephrite Bracelet with Filled Cavity
Jianjun Li, Guihua Li, and Haixia Chen, August 9, 2018
A jade bracelet contains unusual fillers, used to create a smooth surface.
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Filled Pearl with Surface Features
Larry Tai-An Lai, January 26, 2018
A pearl, thought to be natural, is revealed to be a bead-cultured specimen with a pre-drilled nucleus.
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Fluorite Sphere with Phosphorescent Coating
Nathan Renfro, July 31, 2015
A sphere with unusual phosphorescence is seen in the Carlsbad laboratory.
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Article
Autumn 2015 G&G: Trapiche Emeralds, Synthetic Diamonds and a Large Diamond Source
Russell Shor, November 4, 2015
G&G Brief presents an overview of the content of the Autumn 2015 issue of Gems & Gemology.
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Article
Autumn 2016 G&G: CVD Synthetic Diamonds Survey, Reversible Colour Change in Blue Zircon
Jennifer-Lynn Archuleta, October 31, 2016
A summary of the content found in the Autumn 2016 issue of Gems & Gemology.
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Article
Photoluminescence Review and Gem Material from Unusual Locales in the Spring 2016 G&G
Jennifer-Lynn Archuleta, April 26, 2016
A summary of the content in the Spring 2016 issue of Gems & Gemology.
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Article
Spring 2015 G&G Examines Blue Spinel, Chinese Jewellery Design and the Latest in Synthetics
Russell Shor, June 12, 2015
G&G Brief presents an overview of the content of the Spring 2015 issue of Gems & Gemology.
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Article
Summer 2015 G&G: Dual-Stars, Photomicrography Guide, Rubies from Tajikistan, New Micro-World Section
Russell Shor, August 14, 2015
G&G Brief presents an overview of the content of the Summer 2015 issue of Gems & Gemology.
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The Colour Durability of “Chocolate Pearls” by Ballerina Pearl Co.
Garry Du Toit, Andy H. Shen, and Christopher M. Breeding
Colour-treated brown Tahitian cultured pearls, known in the trade as “Chocolate Pearls”, have become increasingly prevalent in the market.
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