mineral
Beryl (likely Aquamarine or Heliodor variant)
Beryllium aluminum cyclosilicate (Be3Al2Si6O18)
Hardness: 7.5-8 on Mohs scale; Color: Pale green to light blue; Luster: Vitreous to pearly; Crystal structure: Hexagonal; Cleavage: Imperfect/Poor; Specific gravity: 2.6-2.9.
- Hardness
- 7
- Color
- Pale green to light blue
- Luster
- Vitreous to pearly
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Physical properties
Hardness: 7.5-8 on Mohs scale; Color: Pale green to light blue; Luster: Vitreous to pearly; Crystal structure: Hexagonal; Cleavage: Imperfect/Poor; Specific gravity: 2.6-2.9.
Formation & geological history
Commonly forms in granitic pegmatites and metamorphic rocks like mica schists through hydrothermal activity and slow cooling of beryllium-rich magma.
Uses & applications
Used as a primary ore for beryllium metal (aviation/defense), and high-quality transparent crystals are used as gemstones in jewelry.
Geological facts
Pure beryl is colorless, but impurities like chromium, iron, or manganese create varieties like Emerald, Aquamarine, and Morganite. Some beryl crystals can grow to massive sizes, weighing several tons.
Field identification & locations
Identify by its hexagonal prism shape and extreme hardness (will scratch glass). Commonly found in Brazil, Pakistan, and parts of the United States like Maine and Colorado. Collectors look for clarity and well-defined crystal faces.
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Mineral
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