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Aquamarine
The name of the mineral derives from Latin 'aqua marina' meaning sea water and refers to the blue-greenish color of the stone. Aquamarine is a variety of beryl, just like emerald and heliodor. Its pale blue color is attributed to Fe2+. The stone is valued not only for its color and transparency, but also for its hardness.
Aquamarine
Basic properties
| Composition | Be3Al2Si6O18 |
| Class | Silicates |
| Crystal system | Hexagonal |
| Mohs' hardness | 7,5-8 |
| Fracture | Conchoidal |
| Cleavage | Imperfect |
| Lustre | Glassy |
| Streak | White |
| Localities | Brazil, Madagascar, Pakistan, Afghanistan, Australia, India, Sri Lanka, USA |
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