Lead Glass filled Star Rubies reportedly from Madagascar

[vincent pardieu]

Dear all,
I would like to inform you that a new study is now online on the www.giathai.net website and will soon be on www.gia.edu:

It is about some very convincing Lead glass filled star rubies.

An interesting note: This new product is not yet in the market but in the next coming weeks it is likely that such treated stones will become much more available than in the past. In fact the Thai burner working on this new material came to see GIA gemologists and invited us to visit his factory and see what he is working on. We could see that several tens of kilos of finished products (from pink to red and to dark red, and from nearly opaque to nearly transparent) are ready to enter the market.

As he is conserned about disclosure issues in consuming markets and the reputation of Thailand and of Thai burners, he decided to contact the GIA Laboratory in Bangkok and to collaborate with us in order to get the gemological community, the trade and the final consumer informed about the new product.

We hope that this attitude and excellent collaboration will be useful providing a good exemple for other burners in the future.

The study is already online on www.giathai.net:

http://www.giathai.net/lab.php

and will soon be on www.gia.edu

http://www.gia.edu/research-resources/n ... index.html

Hoping that you will find it interesting and useful.

All the best,

[MacGyver]

Excellent information Vincent. Thank you so much for the link to the paper.

[dragonstek]

Hi

Another great article Vincent , thank you

I think Mr Thongdeesuk and company should get some thanks too for wanted to help educate us before this treatment is abundent .

[allen]

Is anyone else having problems connecting to the GIA Thai website? I have been trying off and on for hours, to no avail.

[allen]

Finally got to read it via the GIA.EDU site. Still not able to connect to the GIAthai site. Great article, some beautiful stones. Hats off to Mr. Thongdeesuk.

[Edward Bristol]

This is truly rare good news from the treatment-disclosure front.

Thanks Vincent and Mr. Thongdeesuk. Great job.

[Gemsandjewellery]

Great information, thumbs up to Mr Pardieu and Mr Thongdeesuk, keep up the good work . By the way i had no problem connecting to the GIAthai site.

[Barbra Voltaire, FGG]

Treated Ruby Nomenclature Prompts Talk at Tucson

A closeup of a glass-filled ruby.
Photo: Courtesy of American Gemological Laboratories

[kashmirsapphire]

Shocking,its the only thing left to do,these burners r magicians,heat treating and filling glass and still managing to retain the star effect.....i wonder whats the science behind it,i havent read the article but i hope it will give some insight.
thanks for writing this.