mineral

Titanium Amethyst Geode

Silicon Dioxide (SiO2) with Titanium/Metal Vapor Deposition Layer

AI-generated identification · may be incorrect

Hardness: 7 (Mohs scale), Color: iridescent gold, green, purple, and blue over natural violet. Luster: Metallic (coating) and Vitreous (internal). Crystal structure: Trigonal/Hexagonal crystals.

Color: iridescent gold, green, purple, and blue over natural violet
Luster: Metallic (coating) and Vitreous (internal)

Identified July 1, 2026More mineral →

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Physical properties

Hardness: 7 (Mohs scale), Color: iridescent gold, green, purple, and blue over natural violet. Luster: Metallic (coating) and Vitreous (internal). Crystal structure: Trigonal/Hexagonal crystals.

Formation & geological history

Formed as natural amethyst in volcanic geodes via hydrothermal activity. This specimen has been treated with a lab process called Magnetron Sputtering, where thin layers of titanium or gold are bonded at a molecular level to the crystal surface.

Uses & applications

Primarily used for interior decor, crystal healing collections, and as a novelty gemstone specimen.

Geological facts

The rainbow effect is caused by a phenomenon called thin-film interference. While the internal crystal is natural amethyst, the brilliant metallic color is man-made. It is often sold under names like 'Aura Amethyst' or 'Rainbow Quartz'.

Field identification & locations

Identify by looking for a natural amethyst geode base with a metallic, iridescent sheen that does not occur naturally on quartz. Natural iridescent minerals like Peacock Ore (Chalcopyrite) have different crystal structures and hardness.