gemstone

Aquamarine

Beryl (Be3Al2Si6O18)

Hardness: 7.5-8.0 on Mohs scale; Color: Pale blue to light green; Luster: Vitreous; Crystal Structure: Hexagonal; Cleavage: Imperfect; Specific Gravity: 2.66-2.80.

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

Identified July 4, 2026More gemstone →

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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: Imperfect; Specific Gravity: 2.66-2.80.

Formation & geological history

Formed in pegmatites, often found in granitic rock environments. It is formed through hydrothermal activity or metamorphic processes where beryllium is concentrated.

Uses & applications

Primarily used as a gemstone in high-end jewelry and for mineral specimen collecting due to its clarity and color.

Geological facts

Aquamarine is the birthstone for March. Its name is derived from the Latin phrase 'aqua marina', meaning 'seawater', due to its characteristic color. Large crystals can grow up to several feet long.

Field identification & locations

Identify by its hexagonal prismatic crystal habit and pale blue color. Commonly found in Brazil, Pakistan, and Madagascar. High hardness helps distinguish it from glass or softer blue minerals.