mineral

Aura Druzy Agate (Star Shape)

Silicon Dioxide (SiO2) with Titanium/Metal Vapor Coating

AI-generated identification · may be incorrect

Hardness: 6.5-7 Mohs; Color: Iridescent purple and blue; Luster: Vitreous to pearly; Crystal structure: Trigonal (microcrystalline); Features a druzy pocket of small sparkling crystals.

Hardness: 6
Color: Iridescent purple and blue
Luster: Vitreous to pearly

Identified July 7, 2026More mineral →

Explore Aura Druzy Agate (Star Shape) in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Hardness: 6.5-7 Mohs; Color: Iridescent purple and blue; Luster: Vitreous to pearly; Crystal structure: Trigonal (microcrystalline); Features a druzy pocket of small sparkling crystals.

Formation & geological history

Formed as secondary deposits in volcanic rock cavities (vesicles) where silica-rich fluids cooled. This modern piece has been mechanically carved into a star and treated with a thin layer of metallic vapor in a vacuum chamber.

Uses & applications

Metaphysical collecting, decorative display, and jewelry making.

Geological facts

The iridescent sheen is created via a process called 'Vacuum Deposition,' where atoms of gold, titanium, or other metals are bonded to the surface of the stone at a molecular level.

Field identification & locations

Identify by the characteristic concentric banding of agate or the presence of a druzy pocket, combined with an artificial rainbow-metallic finish. Native druzy agate is found globally in Brazil, Uruguay, and India.