| |
| |
| |
| |
|
|
![[Most Recent Quotes from www.kitco.com]](http://www.kitconet.com/charts/metals/gold/t24_au_en_usoz_2.gif)
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
GEMMOLOGICAL PROPERTIES
Rubellite
Family: |
Tourmaline |
Crystal System: |
Trigonal |
Specific Gravity: |
3.03 - 3.25 |
Hardness: |
7 - 7.5 |
Refractive Index: |
1.61- 1.65 |
Chemical Composition: |
Na(Mg,Fe,Mn,Li,Al)3Al6(BO3)Si6O18(OH,F)4 |
Birefringence: |
-0.018 to -0.040 |
Pleochroism: |
Moderate to Strong |
Lustre: |
Vitreous - Resinous |
Cleavage: |
Indistinct |
Fracture: |
Uneven, Chonchoidal |
This gemmological data has been provided by an external consultant. If you notice any errors or omissions - or if you would like to offer a suggestion to improve this service - please contact: webmaster@ajtd.com.au |
.gif) |
 |
 |
 |
 |
 |
 |
 |
 |
|||
Terms of Use | Privacy
Policy | Contact Us Copyright © 2009-2012 ajtdonline.com. All rights reserved. |