noun
- a hard crystalline mineral consisting of magnesium aluminum oxide, typically occurring as octahedral crystals and used as a gemstone
Usage: mineralogy
Examples
- The red spinelle in her ring sparkled brilliantly in the sunlight.
- Geologists discovered deposits of spinelle in the metamorphic rock formation.
- The jeweler explained that spinelle is often confused with ruby due to its similar appearance.
- Black spinelle is sometimes used as an alternative to black diamond in jewelry.
- The museum’s mineral collection featured a rare blue spinelle specimen.