metamorphic

Weathered quartz-rich stone, possibly quartzite

Quartzite (mostly SiO₂), possibly quartz-bearing sandstone or granite fragment

AI-generated identification · may be incorrect

Hardness about 7 Mohs; brown, gray, and white mottling; vitreous to dull luster; massive, granular texture with no obvious cleavage. White areas likely quartz, while brown coloration may reflect iron-oxide staining or weathering.

Identified September 15, 2026More metamorphic →

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Physical properties

Formation & geological history

If quartzite, it formed when quartz-rich sandstone was recrystallized under metamorphic heat and pressure, commonly during mountain building. The image alone cannot establish its geological age or distinguish it confidently from weathered quartz-bearing igneous rock.

Uses & applications

Quartzite is used as crushed aggregate, roadstone, building stone, countertops, and decorative material; attractive pieces may be collected but this specimen appears ordinary.

Geological facts

Quartzite commonly fractures across grains rather than splitting along bedding, and its quartz content makes it resistant to scratching by steel. Iron oxides often produce rusty brown surfaces and patches.

Field identification & locations

Test with a steel knife: genuine quartz-rich material should resist scratching; glass can help test hardness if available. Common sources include mountain belts and ancient sandstone terrains worldwide.