mineral
Rainbow aura quartz (treated quartz crystal)
Quartz, SiO₂, with a thin artificial metal-oxide coating
AI-generated identification · may be incorrectHardness 7 Mohs; the underlying quartz is transparent to translucent with vitreous luster and hexagonal crystal structure. The vivid blue, purple, and green iridescence is a surface coating, not natural color zoning.
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Physical properties
Hardness 7 Mohs; the underlying quartz is transparent to translucent with vitreous luster and hexagonal crystal structure. The vivid blue, purple, and green iridescence is a surface coating, not natural color zoning.
Formation & geological history
Quartz crystallized from silica-rich fluids or magma, commonly in veins and pegmatites over geologic time. The rainbow effect is added afterward by vapor-depositing metals such as titanium onto the crystal.
Uses & applications
Primarily sold as a decorative or collectible specimen; quartz is also used in glass, electronics, and jewelry.
Geological facts
Often marketed as titanium aura or rainbow aura quartz; the coating can scratch or wear away and does not represent a naturally formed quartz color.
Field identification & locations
Identify by the rough quartz crystal form and unusually vivid, metallic rainbow sheen concentrated on its surface. Natural quartz is widespread; aura material is commonly produced by treating mined quartz.
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