noun
- a small cavity in rock or mineral, often lined with crystals
Usage: geology
Examples
- The geologist discovered a beautiful vug filled with quartz crystals.
- Miners often find vugs containing valuable minerals.
- The limestone formation had several vugs lined with calcite.
- She carefully extracted the specimen from the vug without damaging it.
- The vug was about three inches wide and contained purple amethyst.
- Rock collectors prize specimens that include natural vugs.