mineral

Amethyst-bearing quartz cluster

Quartz, SiO₂, with purple amethyst (iron-bearing quartz)

AI-generated identification · may be incorrect

Hardness 7 Mohs; pale translucent to milky quartz with small purple crystal areas and a vitreous luster. Quartz has a trigonal crystal structure and no cleavage, breaking with a conchoidal fracture.

Identified September 30, 2026More mineral →

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Physical properties

Hardness 7 Mohs; pale translucent to milky quartz with small purple crystal areas and a vitreous luster. Quartz has a trigonal crystal structure and no cleavage, breaking with a conchoidal fracture.

Formation & geological history

Quartz crystals commonly grow from silica-rich hydrothermal fluids in cavities and veins; the purple color develops from trace iron and natural irradiation. The image alone cannot establish the specimen’s geological age or locality.

Uses & applications

Collected as a mineral specimen and sometimes used for jewelry or decorative pieces; this small, irregular cluster is more suited to collecting than cutting.

Geological facts

Amethyst is the purple variety of quartz, and its color can range from faint lavender to deep violet.

Field identification & locations

Look for hard, glassy quartz with angular crystal faces and purple coloration; quartz scratches glass and is common in geodes and hydrothermal veins worldwide. The pale body and uneven purple patches may also reflect surface treatment, which cannot be determined from the photo.