gemstone

Blue-violet faceted gemstone, likely amethyst

Quartz (SiO₂), purple variety colored mainly by iron impurities and irradiation

AI-generated identification · may be incorrect

Likely Mohs hardness 7, vitreous luster, transparent to translucent, and trigonal crystal structure; the image shows a small faceted round stone, though color and identity are uncertain from the photo.

Identified September 7, 2026More gemstone →

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At a glance

Common name: Blue-violet faceted gemstone, likely amethyst
Scientific name: Quartz (SiO₂), purple variety colored mainly by iron impurities and irradiation
Category: gemstone
Identified: September 7, 2026
Method: Standard

AI Estimated Value

Approximately $5–$50 for a small commercial amethyst; fine natural color and clarity may reach $100–$500+, while imitations can be worth only a few dollars.

Not an official valuation

AI estimate for general interest only — not an appraisal. Actual value depends on condition, provenance, and market demand. Verify with a professional before buying, selling, or insuring.

This identification was generated by AI and may contain errors. Verify important details before relying on them — and never use an AI result to judge whether a specimen is safe to handle. Read the full disclaimer

Physical properties

Formation & geological history

Amethyst forms in silica-rich hydrothermal veins and volcanic cavities, commonly as crystal linings in basaltic geodes. Its age depends on the host rock, ranging from relatively young to hundreds of millions of years.

Uses & applications

Used in jewelry, ornamental objects, and mineral collections; faceted stones are generally more valuable than ordinary rough amethyst.

Geological facts

The deep blue-violet color could also indicate iolite, sapphire, tanzanite, or synthetic glass, which cannot be distinguished reliably from this image alone.

Field identification & locations

Amethyst commonly occurs in Brazil, Uruguay, Zambia, and Mexico. Confirm with refractive index, hardness, inclusions, and loupe inspection; quartz will not scratch with a steel knife but can scratch glass.