mineral
Purple amethyst crystal specimen
Amethyst, purple variety of quartz (SiO₂)
AI-generated identification · may be incorrectLikely a small polished or naturally terminated quartz crystal; hardness 7 Mohs, vitreous luster, trigonal crystal structure, and no cleavage. Purple color comes from trace iron and natural irradiation; the image is too small to confirm crystal details.
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Physical properties
Likely a small polished or naturally terminated quartz crystal; hardness 7 Mohs, vitreous luster, trigonal crystal structure, and no cleavage. Purple color comes from trace iron and natural irradiation; the image is too small to confirm crystal details.
Formation & geological history
Forms as quartz crystals in silica-rich hydrothermal fluids, commonly in volcanic-rock cavities; amethyst deposits range from ancient to geologically recent.
Uses & applications
Used in jewelry, ornamentation, and mineral collections.
Geological facts
Amethyst is the traditional February birthstone and its color can fade with prolonged heat or intense sunlight.
Field identification & locations
Look for purple coloration, glassy luster, and quartz-like hardness; common sources include Brazil, Uruguay, and Zambia. The image does not show enough detail to verify the identification or assess quality.
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