mineral

Aquamarine

Beryllium aluminum silicate (Be3Al2Si6O18)

Hardness: 7.5–8.0 on Mohs scale; Color: Pale blue to light green; Luster: Vitreous (glass-like); Crystal structure: Hexagonal; Cleavage: Imperfect; Specific gravity: 2.6 – 2.8.

Hardness: 7
Color: Pale blue to light green
Luster: Vitreous (glass-like)

Identified January 13, 2026More mineral →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Hardness: 7.5–8.0 on Mohs scale; Color: Pale blue to light green; Luster: Vitreous (glass-like); Crystal structure: Hexagonal; Cleavage: Imperfect; Specific gravity: 2.6 – 2.8.

Formation & geological history

Formed in pegmatites, often found in granites or hydrothermal veins. It crystallizes from mineral-rich fluids as they cool over millions of years, commonly associated with the Cenozoic era when many major deposits were uplifted.

Uses & applications

Primary use is in high-end jewelry as a gemstone. It is also a source of beryllium, which is used in aerospace, defense, and electronics industries for its high thermal conductivity and light weight.

Geological facts

The largest gem-quality aquamarine ever found was the 'Dom Pedro', weighing approximately 100 lbs (45kg) before being cut. Historically, it was believed to protect sailors and ensure a safe voyage.

Field identification & locations

Identify in the field by its distinct hexagonal crystal shape, lack of cleavage, and vitreous luster. Common locations include Brazil (the world's leading producer), Pakistan, Madagascar, and the United States (Colorado and California).

Other mineral specimens

See all

Sandstone (with potential mineral staining/concretions)

Arenite (SiO2 based)

sedimentary

Epidote

Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)

metamorphic

Nephrite Jade

Nephrite

Mineral/Rock

Banded Gneiss (River Rock/Pebble)

Gneiss (specifically a banded variety often found as a river rock)

Metamorphic Rock

Green Apatite on Albite

Fluorapatite [Ca5(PO4)3F] on Albite [Na(AlSi3O8)]

mineral

Epidote

Epidote - Ca2(Al2,Fe3+)3(SiO4)3(OH)

mineral