mineral

Aquamarine

Beryl (Be3Al2Si6O18)

Hardness: 7.5-8 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 April 9, 2026More mineral →

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Physical properties

Hardness: 7.5-8 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 through hydrothermal activity where beryllium-enriched fluids cool. Geological age varies by location, often associated with Precambrian or Mesozoic formations.

Uses & applications

Primarily used as a gemstone in jewelry (rings, necklaces); also a source of beryllium used in aerospace and electronics alloys.

Geological facts

Aquamarine gets its color from trace amounts of iron. The name is derived from Latin ‘aqua marina’ (seawater), and sailors once wore it as a protection charm against drowning.

Field identification & locations

Identify in the field by its distinct pale blue-green tint, high hardness (will scratch glass easily), and hexagonal crystal habit if unpolished. Commonly found in Brazil, Pakistan, and Madagascar.