 |  |  |
| ||
| Home | | |
|
A large "Persian" turquoise cabochon was impregnated with a material that was also present in cavities on its base. Raman spectroscopy identified the filler as a UV-hardened polymer. Although such polymers have been seen as fillers in other gems, especially emerald, this is the first time the GIA Laboratory has seen turquoise treated with this material. |
|
|
Home | About GIA | Ethics Helpline | Education | Laboratory | GIA Reports | Research | Instruments & Books | Alumni Association Gems & Gemology | Employment at GIA | Careers Available | Newsroom | Publications | Library | Events & Trade Shows | Support GIA | GIA History | How to Buy a Diamond Contact | Search | Site Map | Help This page was last updated 07/19/07 12:17 PM Use of this site signifies your agreement to its terms of use. ©2002 - 2009 Gemological Institute of America Inc. GIA is a nonprofit 501(c)(3) organization. All rights reserved. World Headquarters and Robert Mouawad Campus 5345 Armada Drive, Carlsbad, California 92008 Tel: 760-603-4000 |