Rock Identifier
Tumbled aquamarine-like beryl (Beryl, Be₃Al₂Si₆O₁₈ (likely pale blue-green variety)) — gemstone
gemstone

Tumbled aquamarine-like beryl

Beryl, Be₃Al₂Si₆O₁₈ (likely pale blue-green variety)

AI-generated identification · may be incorrect

Pale blue-green, translucent, with a vitreous luster and rounded tumbled form; beryl has Mohs hardness 7.5–8, hexagonal crystal structure, and poor to indistinct cleavage. Surface inclusions or iron-related brown-orange staining are visible, though the exact material cannot be confirmed from the photo.

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Physical properties

Pale blue-green, translucent, with a vitreous luster and rounded tumbled form; beryl has Mohs hardness 7.5–8, hexagonal crystal structure, and poor to indistinct cleavage. Surface inclusions or iron-related brown-orange staining are visible, though the exact material cannot be confirmed from the photo.

Formation & geological history

Beryl forms in granitic pegmatites and related hydrothermal veins when beryllium-rich fluids crystallize; deposits range from Precambrian to younger geological ages. Aquamarine is commonly found in Brazil, Pakistan, Afghanistan, Madagascar, Nigeria, and Mozambique.

Uses & applications

Used as a gemstone in jewelry and as a collectible mineral; industrial beryl is uncommon, while related beryl varieties may be sources of beryllium. Tumbled pieces are primarily decorative.

Geological facts

Aquamarine is the blue to blue-green variety of beryl, colored mainly by iron. Heat treatment can reduce green tones and produce a bluer appearance.

Field identification & locations

Look for hardness sufficient to scratch glass, hexagonal crystal remnants, vitreous luster, and blue-green transparency; glass and quartz are common look-alikes. A gemological refractive-index test is needed for reliable identification.