Mineral

Rough Aquamarine

Beryl (Be₃Al₂Si₆O‑₁•H₂O)

Hardness: 7.5–8 on Mohs scale; Color: Pale blue to greenish-blue (sea water color); Luster: Vitreous (glassy); Crystal Structure: Hexagonal (often found in prismatic crystals); Cleavage: Imperfect; Specific Gravity: 2.63–2.80.

Hardness: 7
Color: Pale blue to greenish-blue (sea water color)
Luster: Vitreous (glassy)

Identified February 15, 2026More mineral →

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Physical properties

Formation & geological history

Usually forms in granitic pegmatites and hydrothermal veins. The blue color is derived from trace amounts of iron (Fe2+) and can occur in deposits dating from the Precambrian to more recent geological eras.

Uses & applications

Primary use is in the jewelry industry as a semi-precious gemstone. High-quality specimens are faceted for rings and necklaces, while lower-grade material is used for cabochons or beads.

Geological facts

The name 'Aquamarine' comes from the Latin 'aqua marina', meaning 'water of the sea'. It is the birthstone for March and was historically carried by sailors as a talisman for protection and to prevent shipwreck.

Field identification & locations

Identify in the field by its distinct hexagonal crystal shape (if present), high hardness (will scratch glass easily), and its characteristic pale blue vitreous appearance. Commonly found in Brazil, Pakistan, and the Ural Mountains of Russia.