mineral

Quartz-rich stone, possibly milky quartz or quartzite

Quartz (SiO₂), potentially quartzite if metamorphic

AI-generated identification · may be incorrect

Appears pale gray-white, translucent to opaque, with a vitreous to slightly waxy luster and irregular fracture; quartz has Mohs hardness 7 and no cleavage. The image is insufficient to confirm crystal structure or specific gravity.

Identified August 23, 2026More mineral →

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Physical properties

Formation & geological history

Quartz crystallizes from silica-rich hydrothermal fluids or igneous melts; quartzite forms when sandstone is metamorphosed. Ages vary widely, from Precambrian to recent, depending on locality.

Uses & applications

Quartz is used in glass, electronics, abrasives, and countertops; attractive pieces are collected or used decoratively. Quartzite is widely used as dimension stone and aggregate.

Geological facts

A steel knife should not scratch quartz, while quartz can scratch ordinary glass. Milky appearance commonly results from microscopic fluid inclusions or fractures.

Field identification & locations

Common worldwide, especially in hydrothermal veins, granite pegmatites, and metamorphic terrains. Confirm with a glass-scratch test, streak (white), and inspection for distinct crystal faces; exact identification requires testing.