metamorphic

Quartz-rich stone, likely quartzite or milky quartz

Quartzite; predominantly silicon dioxide (SiO₂)

AI-generated identification · may be incorrect

Pale cream to gray, translucent-to-opaque, with a sugary granular texture and vitreous-to-dull luster. Quartz hardness is Mohs 7; quartzite has no cleavage, uneven fracture, and typical specific gravity around 2.65.

Identified September 20, 2026More metamorphic →

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Physical properties

Formation & geological history

If quartzite, it formed when quartz-rich sandstone was recrystallized under heat and pressure during mountain building; if a quartz fragment, it crystallized from silica-rich fluids or igneous melts. Its precise age and identity cannot be determined from the photograph alone.

Uses & applications

Common quartzite is used as aggregate, paving stone, building material, and decorative rock; clear or attractive quartz may be collected or used in ornaments and jewelry.

Geological facts

The specimen appears strongly weathered and lacks diagnostic crystal faces or layering, so quartzite is more likely than a single quartz crystal. A glassy luster and scratch resistance would support quartz-rich composition.

Field identification & locations

Common in metamorphic belts worldwide, including the Appalachians, Rocky Mountains, Alps, India, and Brazil. Test by attempting to scratch glass; acid reaction would suggest carbonate rock instead, while a close look at grain boundaries can distinguish quartzite from massive quartz.