mineral
Aquamarine
Beryl (Be3Al2Si6O18)
AI-generated identification · may be incorrectHardness: 7.5-8.0 on the Mohs scale. Color: Pale blue to greenish-blue. Luster: Vitreous (glass-like). Crystal Structure: Hexagonal. Specific Gravity: 2.66-2.80.
- Hardness
- 7
- Color
- Pale blue to greenish-blue
- Luster
- Vitreous (glass-like)
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Physical properties
Hardness: 7.5-8.0 on the Mohs scale. Color: Pale blue to greenish-blue. Luster: Vitreous (glass-like). Crystal Structure: Hexagonal. Specific Gravity: 2.66-2.80.
Formation & geological history
Commonly formed in granitic pegmatites and metamorphic rocks like schists. It forms as magma cools slowly, allowing large crystals to grow in cavities or veins.
Uses & applications
Primarily used as a gemstone in jewelry (rings, pendants, earrings) and as a birthstone for March. High-quality specimens are highly sought after by mineral collectors.
Geological facts
The name comes from the Latin 'aqua marina', meaning sea water. Traditionally, it was believed to protect sailors and ensure a safe voyage. The largest gem-quality aquamarine ever found was the Marambaia specimen from Brazil, weighing 110 kg.
Field identification & locations
Identify in the field by its hexagonal crystal habit, hardness (it will scratch glass), and its distinct pale blue/cyan hue. Frequent locations include Brazil, Pakistan, Nigeria, and Madagascar.
