mineral

Rainbow aura quartz cluster

Quartz, silicon dioxide (SiO₂), artificially coated with a thin metallic film

AI-generated identification · may be incorrect

Typically hardness 7, vitreous luster, hexagonal crystal structure, and conchoidal fracture; the vivid blue, purple, gold, and green iridescence is a surface coating rather than natural quartz color. The specimen appears to be a coated, partly polished quartz piece with residual crystal faces.

Identified August 10, 2026More mineral →

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Physical properties

Formation & geological history

Quartz formed in hydrothermal veins or cavities, commonly during igneous activity; the underlying material may be millions to billions of years old. The rainbow finish was likely produced later by vacuum deposition of titanium or related metals.

Uses & applications

Used mainly as a decorative mineral, lapidary specimen, and metaphysical collectible; it has little industrial value because the coating is cosmetic.

Geological facts

Often sold as “aura quartz,” “rainbow quartz,” or “titanium quartz.” The coating can scratch, fade, or wear off and should not be confused with naturally iridescent minerals such as bornite.

Field identification & locations

Common source material includes quartz from Brazil, Arkansas, and Madagascar, though coating may occur elsewhere. Identify it by quartz-like hardness and crystal form plus intense thin-film rainbow colors; avoid acids, abrasives, and ultrasonic cleaning.