mineral
Beryl (likely Aquamarine)
Beryllium aluminum silicate (Be3Al2Si6O18)
Hardness: 7.5-8.0 (Mohs), Color: pale blue-green to teal, Luster: vitreous, Crystal structure: hexagonal, Cleavage: indistinct, Specific gravity: 2.63-2.91
- Hardness
- 7
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Physical properties
Hardness: 7.5-8.0 (Mohs), Color: pale blue-green to teal, Luster: vitreous, Crystal structure: hexagonal, Cleavage: indistinct, Specific gravity: 2.63-2.91
Formation & geological history
Found principally in granitic pegmatites and metamorphic rocks (schists). Formed through hydrothermal or igneous processes often during the final stages of magma crystallization.
Uses & applications
Highly valued as a gemstone for jewelry. Also used as an ore of beryllium, which is vital in aerospace, defense, and telecommunications for hardening alloys.
Geological facts
The blue variety is known as aquamarine, meaning seawater. Beryl crystals can grow to enormous sizes; some found in pegmatites have reached several meters in length.
Field identification & locations
Identified by its hexagonal crystal habit, high hardness (scratches glass/quartz), and distinct blue-green hue. Commonly found in Brazil, Pakistan, and the Ural Mountains.
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