gemstone
Emerald
Beryl (Be₃Al₂Si₆O₁₈), colored green by chromium and/or vanadium
AI-generated identification · may be incorrectTransparent to translucent, vivid green, with a vitreous luster and hexagonal crystal structure; Mohs hardness 7.5–8. This small step-cut stone shows visible inclusions typical of emeralds.
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Physical properties
Transparent to translucent, vivid green, with a vitreous luster and hexagonal crystal structure; Mohs hardness 7.5–8. This small step-cut stone shows visible inclusions typical of emeralds.
Formation & geological history
Forms in beryllium-rich geological environments, often in hydrothermal veins or metamorphic rocks; emerald deposits range from Precambrian to younger ages.
Uses & applications
Used in jewelry and collected as a gemstone; lower-clarity material may be cut or polished for decorative use.
Geological facts
Emerald is the green variety of beryl; its characteristic internal inclusions are commonly called a jardin.
Field identification & locations
Major sources include Colombia, Zambia, Brazil, and Afghanistan. Confirm identity and natural or synthetic origin with gemological testing; color alone is not diagnostic.
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