gemstone
Aquamarine (Tumbled)
Beryl (Be3Al2Si6O18)
Hardness: 7.5-8.0 on Mohs scale; Color: Pale blue to light blue-green; Luster: Vitreous; Crystal Structure: Hexagonal; Specific Gravity: 2.68-2.74.
- Hardness
- 7
- Color
- Pale blue to light blue-green
- Luster
- Vitreous
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Physical properties
Hardness: 7.5-8.0 on Mohs scale; Color: Pale blue to light blue-green; Luster: Vitreous; Crystal Structure: Hexagonal; Specific Gravity: 2.68-2.74.
Formation & geological history
Formed in pegmatites and metamorphic rocks through hydrothermal processes. Most gem-quality aquamarine is found in granite pegmatites that formed millions of years ago during the cooling of igneous intrusions.
Uses & applications
Primarily used in jewelry (faceting, cabochons, and beads) and as a birthstone for March. Lower quality specimens are used for mineral collections.
Geological facts
The name 'aquamarine' comes from the Latin 'aqua marina', meaning 'water of the sea'. It is colored by trace amounts of iron within the crystal structure.
Field identification & locations
Identify by its characteristic pale blue color and high hardness (it will scratch glass easily). Tumbled specimens like this are commonly found in gift shops and lapidary outlets. Significant natural deposits occur in Brazil, Pakistan, and Madagascar.
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