mineral

Rough Aquamarine

Beryl (Be₃Al₂Si₆O‑₁₈)

Hardness: 7.5–8.0 on the Mohs scale. Color: Pale blue to light sea-green. Luster: Vitreous (glass-like). Crystal structure: Hexagonal. Cleavage: Indistinct. Specific gravity: 2.63–2.80.

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

Identified March 15, 2026More mineral →

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Physical properties

Hardness: 7.5–8.0 on the Mohs scale. Color: Pale blue to light sea-green. Luster: Vitreous (glass-like). Crystal structure: Hexagonal. Cleavage: Indistinct. Specific gravity: 2.63–2.80.

Formation & geological history

Formed in granitic pegmatites through hydrothermal processes where beryllium is concentrated. Typical geological age ranges from the Neoproterozoic to the Mesozoic depending on the deposit location (e.g., Brazil or Pakistan).

Uses & applications

Primarily used as a gemstone in jewelry. Low-quality or industrial-grade specimens can be used as a source of beryllium metal, which is vital for aerospace and defense industries.

Geological facts

The name comes from the Latin 'aqua marina', meaning 'water of the sea'. Historically, it was believed to protect sailors at sea. The largest gem-quality aquamarine ever found was the Dom Pedro, weighing 10,363 carats.

Field identification & locations

Identify in the field by its distinct hexagonal crystal habit and pale blue color. Commonly found in Brazil, Pakistan, Madagascar, and the United States (Colorado). Collectors look for clarity and intensity of blue hue.