iolites
/ˈaɪəlaɪts/
noun
- Plural of iolite; multiple pieces or types of the blue or violet gemstone.
- She sorted through a tray of iolites, looking for the one with the deepest blue color.
- The museum displayed a collection of iolites from different mines around the world.
- Geologists study iolites to understand the metamorphic conditions under which they formed.