mineral

Milky quartz (quartz-rich rock)

Quartz, SiO₂; the specimen appears to be massive milky quartz, possibly with minor feldspar or mica

AI-generated identification · may be incorrect

White to pale gray, opaque, with a vitreous-to-dull luster and irregular fracture; quartz has Mohs hardness 7 and a hexagonal crystal structure, but individual crystals are not visible here.

Identified October 14, 2026More mineral →

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Physical properties

White to pale gray, opaque, with a vitreous-to-dull luster and irregular fracture; quartz has Mohs hardness 7 and a hexagonal crystal structure, but individual crystals are not visible here.

Formation & geological history

Likely formed as quartz-rich veins or from silica-rich fluids that filled fractures in older rock; quartz occurs in rocks of many geological ages.

Uses & applications

Quartz is used in glassmaking, ceramics, electronics, and as a decorative or lapidary material; this rough piece is mainly suitable for collecting.

Geological facts

Milky appearance results from microscopic fluid or gas inclusions that scatter light.

Field identification & locations

Look for hardness greater than ordinary glass and no visible cleavage; quartz commonly occurs in veins and pegmatites worldwide. The photo does not show enough detail to confirm whether this is pure quartz or a quartz-rich rock.