oligoclase
/ˈɑlɪɡoʊˌkleɪs/
noun
- A common mineral in the feldspar group, usually white or gray, found in igneous rocks.
- Geologists use oligoclase to help determine the history of a rock formation.
- The jeweler identified the pale stone as oligoclase, not quartz.
- Oligoclase is often found in granite and other volcanic rocks.
Synonyms