Aquamarine (Rough)

Physical Properties

Hardness: 7.5-8.0 (Mohs scale); Color: Pale blue to greenish-blue; Luster: Vitreous; Crystal structure: Hexagonal; Cleavage: Imperfect; Specific gravity: 2.67-2.74

Formation & Geological History

Formed in pegmatites, which are igneous rocks with large crystals formed from cooling magma rich in water and rare elements. Most deposits are found in veins within granitic host rocks.

Uses & Applications

Primary use is in the jewelry industry as a gemstone. Lesser quality specimens are sought by mineral collectors. It is also the birthstone for March.

Geological Facts

The name comes from Latin 'aqua marina' meaning water of the sea. Large crystals can reach several feet in length, and the greenish tint is often removed by heat treatment to produce a purer blue.

Field Identification & Locations

Identify by its pale blue-green color, high hardness (will scratch glass easily), and hexagonal crystal habit. Found commonly in Brazil, Pakistan, and Madagascar.

Identified on: 4/22/2026

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