mineral

Iridescent red crystal cluster, likely aura-coated quartz

Quartz (SiO₂), possibly metal-coated; exact identification is uncertain from the photo

AI-generated identification · may be incorrect

Vivid red, magenta, and gold iridescence on sharp crystal points suggests a surface coating rather than natural color. If quartz, it has Mohs hardness 7, a vitreous luster, trigonal crystal structure, and no cleavage; the coating may alter its appearance and durability.

Identified October 8, 2026More mineral →

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Physical properties

Formation & geological history

Quartz forms in hydrothermal veins and cavities as silica-rich fluids cool, across many geological ages. The rainbow metallic sheen is commonly produced later by artificial vapor-deposited metal coating.

Uses & applications

Primarily a decorative or collector specimen; coated quartz is generally not used as a gemstone or in industrial applications.

Geological facts

“Aura” coatings are thin films, often involving titanium or other metals, applied to natural crystal clusters; the coating is not a natural quartz color.

Field identification & locations

Check for naturally formed crystal faces beneath the uniform metallic sheen; the image alone cannot confirm quartz or rule out a different coated mineral. Quartz commonly occurs worldwide, including Brazil, Madagascar, and Arkansas.