Gemmology
English | Български
Where am I? > Home > Library > Glossary — phonolite



Glossary — phonolite

a rare extrusive igneous rock, of intermediate chemical composition between felsic and mafic


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.