mineral
Beryl crystal in a dark mica-rich matrix
Beryl, Be₃Al₂Si₆O₁₈; likely associated with biotite or schist
AI-generated identification · may be incorrectThe pale yellow-green, prismatic crystal has a glassy luster and appears to show lengthwise striations; beryl has Mohs hardness 7.5–8, hexagonal crystal structure, and poor cleavage. The dark, flaky matrix is likely mica-rich, but its precise identity cannot be confirmed from the image.
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Physical properties
The pale yellow-green, prismatic crystal has a glassy luster and appears to show lengthwise striations; beryl has Mohs hardness 7.5–8, hexagonal crystal structure, and poor cleavage. The dark, flaky matrix is likely mica-rich, but its precise identity cannot be confirmed from the image.
Formation & geological history
Beryl crystallizes from silica-rich pegmatitic or hydrothermal fluids, sometimes within metamorphic rocks; its age depends on the deposit and cannot be determined from appearance alone.
Uses & applications
Beryl varieties include emerald and aquamarine gemstones; non-gem beryl is collected, and beryllium-bearing material has specialized industrial uses.
Geological facts
Beryl’s color depends on trace elements: chromium or vanadium can produce emerald, while iron commonly produces aquamarine or yellow tones.
Field identification & locations
Look for a six-sided prismatic crystal, longitudinal striations, and high hardness; the pictured crystal’s color and matrix alone are not enough to establish provenance or exact identification.
