mineral

Amethyst (likely tumbled or polished)

Quartz, SiO₂; purple color commonly caused by trace iron and natural irradiation

AI-generated identification · may be incorrect

Likely Mohs hardness 7, vitreous luster, and hexagonal crystal structure; purple color and uneven fracture are visible, but the image is too blurry to confirm details or identify treatment.

Identified September 25, 2026More mineral →

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Physical properties

Likely Mohs hardness 7, vitreous luster, and hexagonal crystal structure; purple color and uneven fracture are visible, but the image is too blurry to confirm details or identify treatment.

Formation & geological history

Amethyst forms in silica-rich fluids, commonly lining cavities in volcanic rocks; specimens range from geologically young to hundreds of millions of years old.

Uses & applications

Used in jewelry, ornamental objects, and mineral collections.

Geological facts

Amethyst is the purple variety of quartz; heating can lighten or alter its color.

Field identification & locations

Look for purple quartz with glassy luster and hardness sufficient to scratch ordinary glass. Common sources include Brazil, Uruguay, Zambia, and other volcanic regions.