Dictionary of Gems and Gemology

2009 Edition
| Editors: Mohsen Manutchehr-Danai

biaxial stone

Reference work entry
DOI: https://doi.org/10.1007/978-3-540-72816-0_2237

stone having three main indices of refraction and two optical axes or directions, in which each direction is singly refractive.  Biaxial.

Copyright information

© Springer-Verlag Berlin Heidelberg New York 2009