mineral

Aquamarine

Beryllium aluminum silicate (Be3Al2Si6O18)

AI-generated identification · may be incorrect

Hardness: 7.5-8.0 on Mohs scale; Color: Pale blue to light green; Luster: Vitreous; Crystal structure: Hexagonal; Cleavage: Indistinct; Specific gravity: 2.66 to 2.80

Hardness: 7
Color: Pale blue to light green
Luster: Vitreous

Identified June 29, 2026More mineral →

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Physical properties

Hardness: 7.5-8.0 on Mohs scale; Color: Pale blue to light green; Luster: Vitreous; Crystal structure: Hexagonal; Cleavage: Indistinct; Specific gravity: 2.66 to 2.80

Formation & geological history

Formed in granitic pegmatites and metamorphic rocks like schists. It occurs due to late-stage hydrothermal activity in cooling magma bodies where beryllium is concentrated.

Uses & applications

Primary use is in high-end jewelry as a gemstone. Lesser quality specimens are used for mineral collecting or as a minor source of beryllium for industrial alloys.

Geological facts

The name is derived from Latin, meaning 'water of the sea'. Traditionally, it was believed to protect sailors and ensure safe voyages. The largest gem-quality aquamarine ever found was the 'Minas Gerais' specimen in Brazil, weighing 110 kg.

Field identification & locations

Identify by its characteristic pale blue color, hexagonal crystal habit (if uncut), and high hardness. It is commonly found in Brazil, Madagascar, Nigeria, and Pakistan. Collectors look for clarity and intensity of blue hue.