mineral

Rutilated quartz (likely a cabochon set in metal)

Quartz, SiO₂, containing rutile inclusions (TiO₂)

AI-generated identification · may be incorrect

Quartz has Mohs hardness 7, a vitreous luster, and trigonal crystal structure; rutile forms reflective needle-like inclusions. The image shows a polished, translucent cabochon, but its appearance is not clear enough to confirm the inclusions or identify the setting metal.

Identified September 26, 2026More mineral →

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Physical properties

Formation & geological history

Quartz formed in silica-rich veins or cavities; rutile crystals grew within it during geological processes, potentially millions of years ago. Such specimens occur in several metamorphic and hydrothermal environments.

Uses & applications

Used for jewelry and collecting; quartz is also widely used in glassmaking and electronics.

Geological facts

The bright internal pattern may be rutile, but glare and the setting obscure the specimen, so identification is provisional.

Field identification & locations

Check for distinct golden, reddish, or dark needle-like crystals inside the quartz and a glassy surface; common sources include Brazil and Madagascar. A photo alone cannot establish locality or authenticity.