Rock Identifier
Tumbled green beryl or glassy green gemstone (Likely beryl, Be₃Al₂Si₆O₁₈; possibly treated emerald or synthetic glass) — gemstone
gemstone

Tumbled green beryl or glassy green gemstone

Likely beryl, Be₃Al₂Si₆O₁₈; possibly treated emerald or synthetic glass

AI-generated identification · may be incorrect

Translucent blue-green, vitreous luster, rounded tumbled form, and apparent internal fractures/inclusions. Beryl hardness is 7.5–8 Mohs, hexagonal crystal structure, no obvious cleavage, and specific gravity about 2.63–2.80.

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Physical properties

Translucent blue-green, vitreous luster, rounded tumbled form, and apparent internal fractures/inclusions. Beryl hardness is 7.5–8 Mohs, hexagonal crystal structure, no obvious cleavage, and specific gravity about 2.63–2.80.

Formation & geological history

Natural beryl forms in granitic pegmatites and hydrothermal veins, generally during Precambrian to younger geologic events; emerald forms where beryllium-bearing fluids interact with chromium- or vanadium-rich rocks. The pictured piece has been polished or tumbled.

Uses & applications

Gemstone material for cabochons and jewelry; lower-grade beryl is used decoratively and by collectors. If synthetic glass, it has little geological or gem value.

Geological facts

The intense green color may indicate emerald, green beryl, or coloring treatment, but color alone cannot confirm identity. Refractive index, specific gravity, hardness, and microscopic examination are needed.

Field identification & locations

Common sources include Colombia, Brazil, Zambia, Russia, Pakistan, and Afghanistan. A real beryl typically resists scratching by ordinary steel and shows natural inclusions; definitive identification requires gemological testing.