Rock Identifier
Green beryl (likely emerald) (Beryl, Be₃Al₂Si₆O₁₈; green gem-quality beryl is called emerald when its color is caused mainly by chromium and/or vanadium.) — gemstone
gemstone

Green beryl (likely emerald)

Beryl, Be₃Al₂Si₆O₁₈; green gem-quality beryl is called emerald when its color is caused mainly by chromium and/or vanadium.

AI-generated identification · may be incorrect

A vivid green, translucent-to-transparent rough crystal is visible, consistent with beryl, though the photo alone cannot confirm emerald or distinguish it from other green minerals. Beryl has hexagonal crystals, vitreous luster, Mohs hardness 7.5–8, and poor basal cleavage; its specific gravity is about 2.7–2.9.

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Physical properties

A vivid green, translucent-to-transparent rough crystal is visible, consistent with beryl, though the photo alone cannot confirm emerald or distinguish it from other green minerals. Beryl has hexagonal crystals, vitreous luster, Mohs hardness 7.5–8, and poor basal cleavage; its specific gravity is about 2.7–2.9.

Formation & geological history

Beryl forms in granitic pegmatites and related hydrothermal veins; emeralds also occur in metamorphic and hydrothermal settings. Ethiopia has reported emerald occurrences, but the specimen’s age and locality cannot be established from the image.

Uses & applications

Faceted emeralds are used in jewelry; lower-quality beryl may be collected or cut as decorative stones. Beryl is also an important source of beryllium.

Geological facts

The Ethiopian origin and green color support emerald as a possibility, but inclusions, crystal habit, and gem testing are needed for a reliable identification.

Field identification & locations

Check for a hexagonal prism habit and have a gemologist test refractive index and inclusions; green glass and other minerals can look similar. Avoid scratch tests that could damage a valuable specimen.