mineral

Milky quartz

Quartz, silicon dioxide (SiO₂)

AI-generated identification · may be incorrect

Likely massive milky quartz: white to translucent, vitreous luster, Mohs hardness 7, trigonal crystal system, no cleavage, and conchoidal fracture. The small specimen appears irregular and may contain surface staining or attached matrix.

Identified October 15, 2026More mineral →

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Physical properties

Formation & geological history

Quartz commonly crystallizes from silica-rich fluids in fractures and veins, or forms as a late mineral in igneous rocks. It occurs across geological ages and settings; the image alone cannot establish its age or exact origin.

Uses & applications

Quartz is used in glass, electronics, and construction aggregates; attractive pieces are collected or used decoratively. This rough fragment has little apparent gem value.

Geological facts

Quartz is among Earth’s most abundant minerals and is chemically durable, which helps it persist through weathering.

Field identification & locations

Look for hardness sufficient to scratch glass, lack of cleavage, and curved fracture surfaces; these help distinguish quartz from softer white minerals such as calcite. Common worldwide in veins and many rock types.