mineral

Aquamarine

Beryl (Be3Al2Si6O18)

Hardness: 7.5-8.0 on the Mohs scale; Color: Pale blue to light green; Luster: Vitreous (glassy); Crystal Structure: Hexagonal; Cleavage: Imperfect/Indistinct; Specific Gravity: 2.6 – 2.9

Hardness: 7
Color: Pale blue to light green
Luster: Vitreous (glassy)

Identified April 7, 2026More mineral →

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Physical properties

Hardness: 7.5-8.0 on the Mohs scale; Color: Pale blue to light green; Luster: Vitreous (glassy); Crystal Structure: Hexagonal; Cleavage: Imperfect/Indistinct; Specific Gravity: 2.6 – 2.9

Formation & geological history

Formed in granitic pegmatites and metamorphic rocks like schists. The crystallization occurs as hydrothermal fluids cool in cavities or veins during the late stages of magma cooling.

Uses & applications

Primary use is in high-end jewelry and gemstone collecting. Specifically used for faceted gems and cabochons. Lesser-quality specimens are used as sources for the element Beryllium.

Geological facts

The name comes from the Latin 'aqua marina', meaning sea water. Traditionally, it was believed to protect sailors at sea. It is the official birthstone for the month of March.

Field identification & locations

Identify in the field by its distinct hexagonal crystal shape, hardness (scratching quartz with difficulty), and pale sea-blue color. Common locations include Brazil, Pakistan, and Madagascar.