Where am I? > Home > Library > Glossary — pleochroism

Glossary — pleochroism

Sample of pleochroism

Lazulite — specimen 0066, photo © NMNHS

оn optical phenomenon in which the gemstone appears to be different colours when observed at different angles

Gemmology — gemstones
Front page | Introduction | Classification | Repository | Library

© 2024 National Museum of Natural History, Sofia (NMNHS)
Use of this website assumes acceptance of our terms of use.

The specimens illustrated in this site do not exist in the collections of the National Museum of Natural History, Sofia.