mineral

Milky quartz fragment

Quartz (SiO₂)

AI-generated identification · may be incorrect

Typically Mohs hardness 7, white to translucent with a vitreous-to-dull luster and hexagonal crystal structure; no cleavage, with uneven to conchoidal fracture. The small, weathered fragment appears quartz-rich, possibly with minor iron staining or attached host material.

Identified October 10, 2026More mineral →

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Physical properties

Formation & geological history

Quartz commonly crystallizes from silica-rich fluids in veins and cavities, or grows in igneous and metamorphic rocks; its age depends on the host deposit and cannot be determined from the image.

Uses & applications

Quartz is used in glassmaking, electronics, and construction aggregate; attractive pieces may be collected or used in jewelry.

Geological facts

Quartz is one of Earth’s most abundant minerals and can persist after its surrounding rock weathers away.

Field identification & locations

Look for glassy translucence, hardness sufficient to scratch ordinary glass, and absence of cleavage; common in quartz veins and gravel worldwide. Image-based identification is approximate.