Rock Identifier
Quartz Geode (Silicon Dioxide (SiO2)) — mineral
mineral

Quartz Geode

Silicon Dioxide (SiO2)

AI-generated identification · may be incorrect

Hardness of 7 on the Mohs scale, transparent to white color, vitreous luster, and hexagonal crystal system.

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Physical properties

Hardness of 7 on the Mohs scale, transparent to white color, vitreous luster, and hexagonal crystal system.

Formation & geological history

Formed through the deposition of silica-rich groundwater inside hollow cavities of volcanic or sedimentary rocks over millions of years.

Uses & applications

Used in gemstone jewelry, decorative display specimens, and industrial quartz oscillators.

Geological facts

Geodes start as bubbles in volcanic rock or animal burrows in sedimentary layers that slowly fill with mineral crystals.

Field identification & locations

Identified by its rough, rounded exterior and sparkling crystal interior when cracked open; globally distributed in volcanic regions.