LMHC Labs Agree on Glass-Filled Ruby

News  |  www.jckonline.com | Jul 1, 2006

Prior to treatment, much of the low-quality, highly fractured ruby that comes from Madagascar is unusable. However, masking these fractures by introducing a glass filler during treatment with low heat results in a relatively transparent commercial gem product, which raises the question of value.

http://www.jckonline.com/article/CA6349145.html

Rubies With Glass Treatment Seen

The American Gem Trade Association's Gem Testing Center warns the trade to be aware of a glass treatment in rubies. AGTA-GTC received a 16-ct. ruby at its New York laboratory in June which had been treated by this method, suggesting a new form of glass-filled rubies might be entering the trade.

http://www.professionaljeweler.com/archives/news/2004/070704story.html

Untitled Page - Gem Lab Alert: Lead Glass Impregnated Ruby in U.S.

(Rapaport…July 6, 2004) A new ruby treatment has been seen in the United States, the American Gem Trade Association has reported, after it tested a 16-carat ruby treated by a glass-filling process which does not use heat.

http://www.diamonds.net/News/ExportItem.aspx?ArticleID=9920&Action=Print

Labs Define Padparadscha

News  |  www.jckonline.com | May 1, 2006

Members of the Laboratory Manual Harmonization Committee have standardized the nomenclature they use to describe a padparad-scha sapphire. The seven member laboratories will define padparadscha as “a variety of corundum from any geographical origin whose color is a subtle mixture of pinkish orange

http://www.jckonline.com/article/CA6330319.html

AGTA-GTC's New Team

News  |  www.jckonline.com | Nov 1, 2005

Between losing its longtime director and pointed questions about how it could afford to hire three gemological heavyweights to replace him, AGTA’s Gemological Testing Center had a rough start to 2005. Eleven months later, the lab could be more profitable than ever. It was no great surprise to

http://www.jckonline.com/article/CA6279962.html

Glass-Filled Fractures in Ruby—Like Diamond

News  |  www.jckonline.com | Nov 1, 2004

The Sept. 3 edition of the Gübelin Gem Lab (GGL) newsletter announced that lead-filled rubies were entering the market. According to the newsletter, The clarity enhancement of ruby with a lead-based filler might now be considered noted in heat-treated rubies. Heat-treated rubies filled with a

http://www.jckonline.com/article/CA476819.html

Thai Firm Sues Gem Lab for Identifying Lattice Diffusion

News  |  www.jckonline.com | Sep 1, 2004

A Thailand heat-treating firm, the Orange Sapphire Company, claims that the Gem and Jewellery Institute of Thailand (GIT) Laboratory has damaged the value of the company's products and caused confusion among consumers as to whether its orange sapphires are natural or synthetic. According to an

http://www.jckonline.com/article/CA449772.html