mineral
Aquamarine
Beryllium aluminum silicate (Be3Al2Si6O18)
Hardness: 7.5-8.0 (Mohs scale), Color: Pale blue to light green, Luster: Vitreous (glassy), Crystal Structure: Hexagonal, Cleavage: Indistinct, Specific Gravity: 2.66-2.80
- Hardness
- 7
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Physical properties
Hardness: 7.5-8.0 (Mohs scale), Color: Pale blue to light green, Luster: Vitreous (glassy), Crystal Structure: Hexagonal, Cleavage: Indistinct, Specific Gravity: 2.66-2.80
Formation & geological history
Formed in granitic pegmatites and hydrothermal veins. Crystals grow during the cooling of magma rich in volatile elements. Found in ancient metamorphic rocks and alluvial deposits.
Uses & applications
Primarily used as a gemstone in high-quality jewelry. It is also a source of beryllium, which is used in high-tech alloys for aerospace and electronics.
Geological facts
Aquamarine is the birthstone for March. The name comes from the Latin 'aqua marina', meaning sea water, referring to its color. Historically, sailors believed it would protect them during voyages.
Field identification & locations
Check for its high hardness and hexagonal crystal shape. It is commonly found in Brazil, Pakistan, Nigeria, and Colorado (USA). To identify in the field, look for hexagonal blue-green crystals in pegmatite outcrops.
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