Rock Identifier
Green faceted gemstone, likely emerald or synthetic emerald (Beryl, Be₃Al₂Si₆O₁₈, colored green by chromium and/or vanadium; identity cannot be confirmed visually) — gemstone
gemstone

Green faceted gemstone, likely emerald or synthetic emerald

Beryl, Be₃Al₂Si₆O₁₈, colored green by chromium and/or vanadium; identity cannot be confirmed visually

AI-generated identification · may be incorrect

Transparent to translucent oval faceted stone with vivid bluish-green color and vitreous luster; beryl has Mohs hardness 7.5–8, hexagonal crystal structure, indistinct cleavage, and specific gravity about 2.7.…

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Physical properties

Transparent to translucent oval faceted stone with vivid bluish-green color and vitreous luster; beryl has Mohs hardness 7.5–8, hexagonal crystal structure, indistinct cleavage, and specific gravity about 2.7. Internal fractures/inclusions are visible, but the image cannot distinguish natural from laboratory-grown or simulant material.

Formation & geological history

Natural emeralds form in hydrothermal veins and metamorphic rocks, typically during Precambrian to Mesozoic events; major sources include Colombia, Zambia, Brazil, and Afghanistan. Synthetic emeralds are produced hydrothermally or by flux growth.

Uses & applications

Used primarily in jewelry; lower-quality material is collected as a mineral specimen. Emerald’s value depends strongly on color, clarity, treatment, origin, and laboratory confirmation.

Geological facts

A refractometer, specific-gravity test, loupe examination, and spectroscopy are needed for reliable identification; green glass, synthetic emerald, tourmaline, and other beryl can look similar.

Field identification & locations

Field indicators include strong green color, vitreous luster, and frequent inclusions, but color alone is unreliable. Natural emerald commonly occurs with mica, quartz, feldspar, or calcite in mineralized veins.