mineral

Small quartz geode (likely chalcedony with druzy quartz)

Quartz, SiO₂; microcrystalline quartz (chalcedony) lining a cavity

AI-generated identification · may be incorrect

Cream to pale yellow, rounded and weathered exterior with a small hollow containing tiny crystals. Quartz has Mohs hardness 7, vitreous luster on crystals, and hexagonal crystal structure; chalcedony is waxy to dull. Specific gravity is about 2.6.

Identified October 16, 2026More mineral →

Explore Small quartz geode (likely chalcedony with druzy quartz) in the encyclopedia →

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Physical properties

Formation & geological history

Silica-rich fluids deposited chalcedony and quartz crystals in a cavity, commonly in volcanic rock or sediment. Such geodes form across many geological ages; the specimen’s age and exact origin cannot be determined from the image.

Uses & applications

Small geodes are collected and displayed; quartz is also used in jewelry, electronics, and industrial abrasives.

Geological facts

Geodes form when mineral-rich fluids line a cavity, leaving an open center that may later develop sparkling crystals.

Field identification & locations

Look for a rounded, often knobby exterior and a hollow interior lined with crystals; this example appears naturally worn or partly opened. Geodes occur worldwide, including in volcanic regions and sedimentary formations.