mineral
Rainbow aura quartz cluster
Quartz, silicon dioxide (SiO₂), artificially coated with a thin metallic film
AI-generated identification · may be incorrectTypically 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.
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Physical properties
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.
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.
