Beryl
From apm
Revision as of 11:10, 16 February 2024 by Apm (Talk | contribs) (added Topaz and relation to emerald)
A hard beryllium aluminum silicate.
Beryllium is rare so usefulness as structural material is limited.
- 🟩 Green form of beryl is the widely known emerald.
Related
- Bromellite: BeO, Mohs9, hexagonal
- Topaz … another unusually hard widely known silicate but avoiding elemental scarcity