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The wax-impregnated bangle (left) showed bluish fluorescence under long-wave UV.

Strong Fluorescence in B-Jade Impregnated with Wax

Larry Tai-An Lai, August 9, 2018

A bangle is an example of the misconception that B jade is only impregnated by resin, when in fact wax-impregnated jadeite is also considered B-jade.

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.

These rubies were determined to be glass filled, partly due to the use of the DiamondView.

Separating Glass-Filled Rubies Using the DiamondView

Larry Tai-An Lai, August 9, 2018

The DiamondView instrument is able to identify glass as the filler in a pair of heart-shaped rubies.

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.

These two opals were represented as natural-color blue and pink opal from Mexico.

Update on Dyed Hydrophane Opal

Edward Boehm and Nathan Renfro, January 26, 2018

Opal purportedly from a new deposit is found to be dyed.

Top: The drilled green briolettes. Bottom: Fluid inclusions, crystals, and two-phase inclusions.

Coated Beryl Imitating Emerald

Larry Tai-An Lai, January 26, 2018

Coating on a beryl demonstrates the importance of thorough examination of jewellery and gem materials.

Impregnated and Dyed Turquoise

Wen Han, Taijin Lu, Huiru Dai, Jun Su, and Hui Dai, November 23, 2015

Natural turquoise has been subjected to dyeing and three types of impregnation.

Polymer-Treated Hessonite

Gagan Choudhary, April 28, 2016

Hessonite thought to be glass-filled is found to have been treated with polymer.

Steam-dyed “chicken-fat yellow beeswax” amber.

Steam-Dyed Amber

Yamei Wang, Fen Liu, Shufang Nie, and Andy Shen, August 3, 2016

Testing identifies a new treatment method as the cause of colour in beeswax amber.

Update on the Rock Creek Sapphire Deposit

Warren Boyd and Keith Barron, July 31, 2015

An overview of recently expanded sapphire production at the Gem Mountain mine near Philipsburg, Montana.

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