mineral
Aquamarine (Beryl)
Beryllium aluminum silicate (Be3Al2Si6O18)
Hardness: 7.5-8.0 on Mohs scale; Color: Pale blue to greenish-blue; Luster: Vitreous (glassy); Crystal Structure: Hexagonal; Specific Gravity: 2.66-2.80.
- Hardness
- 7
- Color
- Pale blue to greenish-blue
- Luster
- Vitreous (glassy)
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Physical properties
Hardness: 7.5-8.0 on Mohs scale; Color: Pale blue to greenish-blue; Luster: Vitreous (glassy); Crystal Structure: Hexagonal; Specific Gravity: 2.66-2.80.
Formation & geological history
Formed in granitic pegmatites or metamorphic rocks through hydrothermal processes involving beryllium-rich fluids. Often found in pockets within pegmatite veins.
Uses & applications
Primarily used as a gemstone in high-end jewelry (faceted or cabochon) and as a birthstone for March. High-quality specimens are prized for mineral collections.
Geological facts
The name 'Aquamarine' is derived from the Latin for 'seawater.' Historically, sailors carried it to protect against the dangers of the ocean. It gets its blue color from trace amounts of iron.
Field identification & locations
Identify by its characteristic pale blue color, high hardness (cannot be scratched by steel), and hexagonal crystal prism shape if unpolished. Commonly found in Brazil, Pakistan, and Madagascar.
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