mineral

Quartz-rich rock, possibly milky quartz or quartzite

Quartz (SiO₂), potentially quartzite if the grainy texture is rock-wide

AI-generated identification · may be incorrect

Likely hardness ~7 Mohs, gray to translucent white, with a glassy to dull luster and irregular fracture; visible granular sparkle suggests interlocking quartz grains. Cleavage is absent, and specific gravity is about 2.65.

Identified August 11, 2026More mineral →

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Physical properties

Formation & geological history

Quartz crystallizes from silica-rich fluids or melts; quartzite forms when quartz sandstone is metamorphosed. A precise geological age and identification require locality and testing.

Uses & applications

Common quartz is used in glass, ceramics, electronics, abrasives, and countertops; attractive pieces may be collected, though this specimen appears modest in quality.

Geological facts

Quartz is one of Earth’s most abundant minerals and is highly resistant to weathering. A glass-scratch test and inspection for uniform interlocking grains can help distinguish quartz from quartzite.

Field identification & locations

Common in veins, pegmatites, sandstone, and metamorphic terrains worldwide. Confirm with hardness, a white streak, absence of cleavage, and ideally a specific-gravity or microscopy test; avoid scratching valuable surfaces.