mineral

Small quartz fragment, possibly milky quartz

Quartz (SiO₂)

AI-generated identification · may be incorrect

White to translucent, vitreous luster, no obvious cleavage, and likely hardness 7 on the Mohs scale; the image is too low-resolution for confident crystal-form identification.

Identified August 15, 2026More mineral →

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Physical properties

White to translucent, vitreous luster, no obvious cleavage, and likely hardness 7 on the Mohs scale; the image is too low-resolution for confident crystal-form identification.

Formation & geological history

Quartz commonly crystallizes from silica-rich hydrothermal fluids, igneous melts, and metamorphic veins; individual grains may range from ancient Precambrian material to geologically recent deposits.

Uses & applications

Used in glass, ceramics, abrasives, electronics, and countertops; clear or well-formed crystals are collected and sometimes used as gemstones.

Geological facts

Quartz is one of Earth’s most abundant minerals and is highly resistant to weathering, making it common in stream sediments and sand.

Field identification & locations

Likely quartz if it scratches glass and does not fizz in dilute acid; common worldwide, especially in granite, pegmatite, quartz veins, and quartz-rich sediment. The rounded appearance may indicate tumbling or natural abrasion.