Beryl

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A hard beryllium aluminum silicate.
Beryllium is rare so usefulness as structural material is limited.
Al2Be3[Si6O18], hexagonal, Mohs 7.5 to 8.0

  • 🟩 Green form of beryl is the widely known emerald.

Related

  • Bromellite: BeO, Mohs 9, hexagonal
  • Topaz Mohs 8 (defining mineral) … another unusually hard widely known silicate but avoiding elemental scarcity

External links

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