gemstone
Aquamarine
Beryl (Be3Al2Si6O18 with iron impurities)
Hardness: 7.5-8.0 (Mohs), Color: Pale blue to greenish-blue, Luster: Vitreous, Crystal System: Hexagonal, Specific Gravity: 2.66-2.80
- Hardness
- 7
- Luster
- Vitreous, Crystal System: Hexagonal, Specific Gravity: 2
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Physical properties
Hardness: 7.5-8.0 (Mohs), Color: Pale blue to greenish-blue, Luster: Vitreous, Crystal System: Hexagonal, Specific Gravity: 2.66-2.80
Formation & geological history
Formed in granitic pegmatites and metamorphic rocks like schists during late-stage hydrothermal activity. Typically found in deposits dating back millions of years.
Uses & applications
Primary use is in fine jewelry as a gemstone and as a collector's mineral specimen. Beryl is also an ore of beryllium used in aerospace and electronics.
Geological facts
The largest gem-quality aquamarine ever found was the Marambaia Aquamarine, weighing over 110 kilograms. Its name comes from the Latin 'aqua marina' meaning sea water.
Field identification & locations
Identify by its characteristic pale blue color and hexagonal prism crystal habit. Often found in Brazil, Pakistan, and parts of Africa. For collectors, clarity and color depth are key.
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