mineral

Likely tumbled quartz-bearing rock or glittery quartz specimen

Quartz, silicon dioxide (SiO₂), possibly included quartz or quartzite

AI-generated identification · may be incorrect

Appears gray to translucent and highly reflective, with numerous tiny crystal facets; quartz has Mohs hardness 7, vitreous luster, no cleavage, conchoidal fracture, and specific gravity about 2.65. Strong glare and limited context prevent confident identification of exact texture or inclusions.

Identified September 12, 2026More mineral →

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Physical properties

Formation & geological history

Quartz crystallizes from silica-rich hydrothermal fluids, igneous melts, or metamorphic rocks; quartzite forms when sandstone is metamorphosed. Quartz is geologically widespread and ranges from Precambrian to modern deposits.

Uses & applications

Used for glass, ceramics, electronics, abrasives, countertops, and ornamental stone; attractive pieces may be sold as lapidary or display specimens.

Geological facts

The intense sparkle may result from polished crystal faces, druzy quartz, mica inclusions, or a coated/tumbled surface rather than metallic mineral grains.

Field identification & locations

Check for hardness by whether it scratches ordinary glass, inspect facets with magnification, and test streak (quartz is white); avoid destructive tests on valuable material. Common sources include Brazil, Madagascar, Arkansas, and many hydrothermal veins worldwide.