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Aquamarine Gemstones
- Crystal system: Hexagonal
- Chemical composition: Silicate of aluminium beryllium Al2 Be3 (Si6 O18)
- Color: Blue to blue-green
- Hardness: 7.5 - 8.0
- Specific gravity: 2,72 (+0,18 -0,05)
- Refractive index: 1,577 - 1,583
- Dispersion: 0.014
- Pleochroism: Light to medium (blue, sometimes blue and blue-green)
- Birthstone: March
- Enhancements: Aquamarines may be heated to remove yellow components and produce a purer blue color. The treatment is permanent and is a common practice in the industry.
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