mineral

Quartz fragment (likely milky quartz)

Quartz, silicon dioxide (SiO₂)

AI-generated identification · may be incorrect

White to translucent, vitreous-to-waxy luster, hardness 7 Mohs, conchoidal fracture, no cleavage, and a hexagonal crystal structure. The fragment appears chipped or naturally broken, with minor surface weathering or coating.

Identified September 8, 2026More mineral →

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Physical properties

Formation & geological history

Quartz crystallizes from silica-rich igneous, hydrothermal, and metamorphic fluids; individual crystals may range from ancient Precambrian to modern. This specimen could derive from a quartz vein, granite, or weathered sediment.

Uses & applications

Used in glass, ceramics, electronics, abrasives, and engineered stone; clear varieties are used as gemstones. This small fragment has minimal commercial value.

Geological facts

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

Field identification & locations

Identify it by its glassy appearance, lack of cleavage, conchoidal breakage, and ability to scratch ordinary glass; a steel knife will not scratch it. Common worldwide, especially in quartz veins, granites, pegmatites, and metamorphic rocks.