mineral

Aquamarine

Beryl (Be3Al2Si6O18 with iron traces)

Hardness: 7.5–8.0 Mohs; Color: Pale blue to greenish-blue; Luster: Vitreous; Crystal Structure: Hexagonal; Cleavage: Poor/Indistinct; Specific Gravity: 2.66–2.80

Hardness: 7
Color: Pale blue to greenish-blue
Luster: Vitreous

Identified February 14, 2026More mineral →

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Physical properties

Hardness: 7.5–8.0 Mohs; Color: Pale blue to greenish-blue; Luster: Vitreous; Crystal Structure: Hexagonal; Cleavage: Poor/Indistinct; Specific Gravity: 2.66–2.80

Formation & geological history

Formed in granitic pegmatites and metamorphic rocks like schist through hydrothermal activity. Found in veins where magma cools slowly, allowing for large crystal growth over millions of years.

Uses & applications

Primary use is in high-end jewelry as a gemstone. Lesser-quality specimens are prized by mineral collectors. It is also a source of beryllium, used in aerospace and electronics.

Geological facts

The name is derived from the Latin 'aqua marina', meaning sea water. Sailors once carried it as a talisman for protection against drowning and to prevent seasickness.

Field identification & locations

Identify by its distinct hexagonal crystal habit and light blue transparency. In the field, look for it in pegmatite veins within granite. Common locations include Brazil, Pakistan, and the Ural Mountains in Russia.

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