mineral
Rainbow Quartz (Fire and Ice Quartz)
Silicon Dioxide (SiO2)
Hardness 7 on Mohs scale, vitreous luster, hexagonal crystal structure (trigonal system), transparent colorless quartz with internal fractures displaying bright iridescent rainbow light refraction.
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Physical properties
Hardness 7 on Mohs scale, vitreous luster, hexagonal crystal structure (trigonal system), transparent colorless quartz with internal fractures displaying bright iridescent rainbow light refraction.
Formation & geological history
Formed in hydrothermal veins and pegmatites. The internal cracks that cause the iridescent rainbow flashes are produced naturally through tectonic stress or artificially thermally shocked (heated and quenched in cold water).
Uses & applications
Popular in crystal healing, metaphysical collections, jewelry polishing (cabochons, tumbled stones), and ornamental displays.
Geological facts
The rainbow effect is caused by thin-film light interference when light passes through micro-fractures inside the clear quartz matrix. Often called 'Fire and Ice Quartz' or 'Iridescent Quartz'.
Field identification & locations
Look for high clarity clear quartz containing internal veil-like fractures that split incoming light into vivid spectrum colors. Commonly found in Brazil, Madagascar, and the USA.
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