 |  |  |
| ||
| Home | | |
|
|
|
|
|||||
|
|
||||||
Tourmalines from an alluvial deposit near Lundazi in Zambia consist of color-zoned pink/colorless/yellow-green 'watermelon' nodules; many fashioned stones contain patches and blends of all three colors. Although these elbaite tourmalines are unusually rich in bismuth (up to 0.49 wt% Bi2O3), the presence of bismuth apparently has no effect on their gemological properties. Approximately 10,000 carats of fashioned stones are known to have been produced from October 1996 to mid-1997. |
|
|
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 08/15/05 09:08 AM Use of this site signifies your agreement to its terms of use. ©2002 - 2008 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 |