Rock Identifier
Quartz pebble (Silicon dioxide (SiO2)) — mineral
mineral

Quartz pebble

Silicon dioxide (SiO2)

AI-generated identification · may be incorrect

Hardness of 7 on Mohs scale. Typically milky white to translucent with a vitreous luster. Hexagonal crystal system, though often found as massive or tumbled pieces without clear crystal faces.

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Physical properties

Hardness of 7 on Mohs scale. Typically milky white to translucent with a vitreous luster. Hexagonal crystal system, though often found as massive or tumbled pieces without clear crystal faces.

Formation & geological history

Forms from cooling magma or hydrothermal veins. Found globally in igneous, metamorphic, and sedimentary rocks. This specimen is likely weathered and water-worn.

Uses & applications

Used in glassmaking, electronics, optics, abrasives, and as a semi-precious stone in jewelry and lapidary.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. It exhibits piezoelectricity, generating an electric charge under mechanical stress.

Field identification & locations

Identify by its hardness (scratches glass) and conchoidal fracture. Common in riverbeds, beaches, and soil worldwide.

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Epidote (Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)) — metamorphic

Epidote

Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)

metamorphic