mineral
Aura Amethyst (Dyed/Coated)
Titanium-treated Silicon Dioxide (SiO2)
Hardness: 7 (Mohs); Color: Purple with iridescent metallic sheen; Luster: Vitreous to metallic; Crystal System: Trigonal; Specific Gravity: 2.65
- Hardness
- 7 (Mohs)
- Color
- Purple with iridescent metallic sheen
- Luster
- Vitreous to metallic
Identified More mineral →
Explore Aura Amethyst (Dyed/Coated) in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness: 7 (Mohs); Color: Purple with iridescent metallic sheen; Luster: Vitreous to metallic; Crystal System: Trigonal; Specific Gravity: 2.65
Formation & geological history
Natural amethyst crystals formed in geodic cavities, subsequently treated by humans using physical vapor deposition (PVD) to bond metallic vapors (like titanium or gold) to the surface.
Uses & applications
Used primarily for decorative purposes, crystal healing, metaphysical practices, and as inexpensive jewelry components.
Geological facts
While the base is a natural amethyst geode fragment, the iridescent 'rainbow' effect is not found in nature; it is a laboratory enhancement that creates a 'peacock tail' appearance.
Field identification & locations
Identify by the unnatural metallic rainbow sheen over a purple crystal base. Genuine aura quartz will not lose its sheen easily, but dyed versions may leave residue. Frequently sold at gem shows and 'metaphysical' shops.
More like this
Other mineral specimens
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
Granite
Granite (Phaneritic intrusive igneous rock)
igneous