gemstone

Tumbled pale-green beryl (likely aquamarine)

Beryl, Be₃Al₂Si₆O₁₈; blue-green varieties are aquamarine

AI-generated identification · may be incorrect

Hardness 7.5–8 Mohs; pale blue-green, translucent, vitreous-to-waxy luster, and typically hexagonal crystal structure. The rounded surface is tumbled or naturally water-worn, with no obvious cleavage.

Identified August 21, 2026More gemstone →

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Physical properties

Formation & geological history

Forms mainly in granitic pegmatites when beryllium-rich fluids crystallize in cavities, generally during the Precambrian–Phanerozoic. The exact specimen cannot be dated from an image.

Uses & applications

Transparent aquamarine is used in jewelry; pale, cloudy material is mainly sold as a cabochon, tumbled stone, or collector specimen. Beryl is also an important beryllium ore.

Geological facts

The color may also indicate pale green beryl or another mineral such as prehnite; visual identification alone is not definitive. Aquamarine’s blue-green color commonly results from iron impurities.

Field identification & locations

Common sources include Brazil, Pakistan, Afghanistan, Madagascar, Nigeria, and Russia. Confirm with hardness, refractive index, and specific gravity testing; avoid destructive scratch tests on valuable stones.