gemstone

Amethyst jewelry centerpiece

Amethyst, purple quartz (SiO₂), likely set with colorless diamonds or other gems

AI-generated identification · may be incorrect

Amethyst is quartz with Mohs hardness 7, vitreous luster, purple coloration from iron-related impurities and irradiation, and a trigonal crystal structure with no cleavage. The image shows a polished, faceted purple gemstone in jewelry; exact stone identity and treatments cannot be confirmed visually.

Identified August 16, 2026More gemstone →

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At a glance

Common name: Amethyst jewelry centerpiece
Scientific name: Amethyst, purple quartz (SiO₂), likely set with colorless diamonds or other gems
Category: gemstone
Identified: August 16, 2026
Method: Standard

AI Estimated Value

Approximately $20-$300 for a typical amethyst jewelry stone; the complete antique or precious-metal piece may range from $200 to several thousand dollars depending on authenticity, gem quality, and provenance.

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 fluids, commonly lining cavities in volcanic rocks, especially basalt, and is generally Phanerozoic in age. Major sources include Brazil, Uruguay, Zambia, and South Korea.

Uses & applications

Used extensively in jewelry and ornamental objects; it is February’s birthstone. It is also collected as mineral specimens and geodes.

Geological facts

Color ranges from pale lilac to deep violet, with heating sometimes producing citrine or green quartz. Amethyst can fade with prolonged intense light or heat.

Field identification & locations

Identify it by its purple color, glassy luster, quartz-like hardness, and lack of cleavage; jewelry settings and possible glass or synthetic imitations require testing. The surrounding stones appear to include faceted diamonds, but this cannot be confirmed from the image.