mineral

Milky quartz

Quartz (SiO₂), likely massive or vein quartz

AI-generated identification · may be incorrect

Hardness 7 Mohs; translucent to milky white with a glassy luster and irregular fracture. Trigonal crystal structure, but this fragment shows no obvious crystal faces or cleavage.

Identified October 3, 2026More mineral →

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Physical properties

Hardness 7 Mohs; translucent to milky white with a glassy luster and irregular fracture. Trigonal crystal structure, but this fragment shows no obvious crystal faces or cleavage.

Formation & geological history

Forms when silica-rich fluids crystallize in fractures and veins, or during igneous and metamorphic processes. Quartz is found in rocks of many ages; this fragment’s age and exact origin cannot be determined from the image.

Uses & applications

Used in glassmaking, ceramics, and as a source of silica; attractive pieces are collected or used decoratively.

Geological facts

Quartz is one of Earth’s most abundant minerals and has no true cleavage, so it typically breaks with curved or uneven fracture surfaces.

Field identification & locations

The pale, glassy appearance and lack of visible cleavage are consistent with quartz, though a photo cannot confirm identification. Common worldwide in veins and many rock types; this small rough fragment likely has little commercial value.