mineral
Aquamarine
Beryl (Be3Al2Si6O18 with Fe impurities)
Hardness: 7.5-8 on Mohs scale; Color: Pale blue to light sea-green; Luster: Vitreous (glassy); Crystal Structure: Hexagonal; Specific Gravity: 2.66-2.80.
- Hardness
- 7
- Color
- Pale blue to light sea-green
- Luster
- Vitreous (glassy)
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Physical properties
Hardness: 7.5-8 on Mohs scale; Color: Pale blue to light sea-green; Luster: Vitreous (glassy); Crystal Structure: Hexagonal; Specific Gravity: 2.66-2.80.
Formation & geological history
Forms primarily in granitic pegmatites and metamorphic rocks (schist) through hydrothermal activity during late-stage igneous cooling.
Uses & applications
Primarily used as a gemstone in jewelry; also a collector's mineral and a minor source of beryllium for industrial alloys.
Geological facts
The name is derived from the Latin 'aqua marina', meaning 'seawater'. In ancient times, sailors believed it would protect them against storms at sea.
Field identification & locations
Identified by its distinctive pale blue color, high hardness, and hexagonal crystalline habit. Common locations include Brazil, Pakistan, and Nigeria.
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Sedimentary Sandstone (mostly SiO2 with Fe2O3 tinting)
sedimentary
Schist
Schist
Metamorphic
Gypsum (variety Selenite or Alabaster)
Calcium sulfate dihydrate (CaSO4·2H2O)
Mineral
Epidote
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