Article Search Results

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.

Two white jade bracelets with dark color patches.

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.

This 20.60 ct specimen was purchased by the client as a “natural white pearl.”

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.

Fluorite Sphere with Phosphorescent Coating

Nathan Renfro, July 31, 2015

A sphere with unusual phosphorescence is seen in the Carlsbad laboratory.

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.

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.

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.

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.

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.

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.

Article Search Results

Types

Content Type

Reviewed

Topics

Topics

Gemstones

Article Search Results

Types

Content Type

Reviewed

Topics

Topics

Gemstones

Find a Retailer

Visit the campus shop

Subscribe to Knowledge Rocks Emails

G&G Winter 2019 Edition