mineral

Aquamarine

Beryl (Be3Al2Si6O18) with trace Iron (Fe2+)

AI-generated identification · may be incorrect

Hardness: 7.5 to 8 (Mohs); Color: Pale blue to greenish-blue; Luster: Vitreous; Crystal structure: Hexagonal; Cleavage: Indistinct; Specific Gravity: 2.66-2.80

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

Identified July 19, 2026More mineral →

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Physical properties

Hardness: 7.5 to 8 (Mohs); Color: Pale blue to greenish-blue; Luster: Vitreous; Crystal structure: Hexagonal; Cleavage: Indistinct; Specific Gravity: 2.66-2.80

Formation & geological history

Typically found in granitic pegmatites and metamorphic rocks (schists). Usually formed in the later stages of magma cooling where rare elements like Beryllium are concentrated. Some deposits date back millions of years.

Uses & applications

Primary use as a gemstone in jewelry. Also used as a collector specimen and as an ore of Beryllium for aerospace and nuclear industries.

Geological facts

The name comes from the Latin word 'aqua marina' meaning sea water. Sailors used to carry it for protection on the sea. The largest gem-quality specimen was found in Brazil, weighing 110 kg.

Field identification & locations

Identify by its pale blue hue, high hardness (scratches glass/quartz), and lack of cleavage. Common in Brazil, Madagascar, Pakistan, and the United States (Colorado).