mineral

Amethyst druzy cluster

Amethyst, purple variety of quartz (SiO₂)

AI-generated identification · may be incorrect

Violet, sparkling coating of tiny crystals on a likely cut or natural base; vitreous luster and hexagonal crystal structure. Mohs hardness 7; no prominent cleavage, specific gravity about 2.65.

Identified October 7, 2026More mineral →

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Physical properties

Violet, sparkling coating of tiny crystals on a likely cut or natural base; vitreous luster and hexagonal crystal structure. Mohs hardness 7; no prominent cleavage, specific gravity about 2.65.

Formation & geological history

Quartz crystals grew from silica-rich fluids in a cavity, with trace iron and natural irradiation producing the purple color. Such deposits formed in volcanic geodes over geological time; the specimen’s exact age and locality cannot be determined from the image.

Uses & applications

Used for display and collecting; amethyst is also cut for jewelry and ornamental objects.

Geological facts

Amethyst’s color can fade with prolonged strong sunlight or heat.

Field identification & locations

Identify by its purple quartz crystals, glassy sparkle, and hardness; common sources include Brazil, Uruguay, and Zambia. The image appears to show a dense druzy surface on a shaped specimen.