mineral

Aura Amethyst (Dyed/Coated)

Titanium-treated Silicon Dioxide (SiO2)

AI-generated identification · may be incorrect

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 July 6, 2026More mineral →

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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.