schorl
/ʃɔrl/
noun
- A black, opaque variety of tourmaline, a mineral often found in granite and used as a gemstone or in industrial applications.
- She collected minerals and was especially proud of her schorl specimen from Brazil.
- Geologists found large deposits of schorl in the granite quarry near the mountain.
- The jeweler showed me a ring with a dark schorl stone that shimmered faintly in the light.