mineral
Aura Quartz / Rainbow Aura Quartz
Silicon Dioxide (SiO2) with metallic vapor coating
Hardness: 7 (Mohs scale), Color: iridescent/rainbow over clear quartz, Luster: Vitreous to metallic-iridescent, Crystal: Hexagonal, Cleavage: None
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Physical properties
Hardness: 7 (Mohs scale), Color: iridescent/rainbow over clear quartz, Luster: Vitreous to metallic-iridescent, Crystal: Hexagonal, Cleavage: None
Formation & geological history
Formed by a process called chemical vapor deposition (CVD) where natural quartz is placed in a vacuum chamber and fused with vaporized precious metals like titanium or gold.
Uses & applications
Predominantly used for jewelry, crystal healing practices, decorative displays, and by mineral collectors interested in treated specimens.
Geological facts
While the core is a natural geological mineral, the outer display is man-enhanced. It is often mistake for Opal, but its rainbow sheen is much more uniform and superficial.
Field identification & locations
Look for the metallic, soap-bubble-like iridescent sheen that doesn't change with the internal structure of the stone. Real quartz underneath will show its typical conchoidal fracture if chipped.
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Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
Schist
Schist
Metamorphic
Epidote
Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic
Gypsum (variety Selenite or Alabaster)
Calcium sulfate dihydrate (CaSO4·2H2O)
Mineral
Nephrite Jade
Nephrite
Mineral/Rock
Banded Gneiss (River Rock/Pebble)
Gneiss (specifically a banded variety often found as a river rock)
Metamorphic Rock