gemstone

Polished purple gemstone bead, possibly amethyst

Likely amethyst, purple quartz (SiO₂); identification is uncertain from the image

AI-generated identification · may be incorrect

Small, rounded and polished, with a dark-purple color and vitreous luster. If quartz, hardness is 7 Mohs and its crystal structure is trigonal; the photo does not show diagnostic features clearly enough to confirm it.

Identified October 13, 2026More gemstone →

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Physical properties

Formation & geological history

Amethyst forms as quartz crystals, commonly in cavities in volcanic rocks, where trace iron and natural radiation produce its purple color. Deposits range in age and occur worldwide.

Uses & applications

Often used in beads, jewelry, and decorative objects; quartz is also used in electronics and industry.

Geological facts

Amethyst is the purple variety of quartz. Color and appearance alone cannot distinguish it reliably from dyed stones or other purple minerals.

Field identification & locations

The image shows a polished bead, not enough detail for a firm identification; hardness testing or gemological examination would help. Amethyst is commonly mined in Brazil, Uruguay, Zambia, and elsewhere.