phenakite
/ˈfɛnəkaɪt/
noun
- A rare, colorless or pale-colored mineral made of beryllium silicate, sometimes used as a gemstone.
- Collectors prize phenakite for its clarity and brilliance.
- The jeweler showed us a beautiful faceted phenakite that sparkled like a diamond.
- She added a rare phenakite to her mineral collection after the rock show.