mineral

Small quartz-rich rock fragment

Likely quartz-bearing granite, pegmatite, or quartzite; exact identification is uncertain from the photograph

AI-generated identification · may be incorrect

Pale gray-white, granular and irregular, with a vitreous appearance; likely quartz plus feldspar and possibly mica. Quartz hardness is Mohs 7, with no cleavage and conchoidal fracture; the specimen appears only a few millimeters across.

Identified August 15, 2026More mineral →

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Physical properties

Formation & geological history

Probably a naturally weathered fragment of quartz-rich igneous or metamorphic rock, formed deep in Earth’s crust and later exposed and broken down by erosion; its geological age cannot be determined visually.

Uses & applications

Small fragments have little industrial or jewelry use, though quartz-rich rocks are used as aggregate, building stone, and silica sources. Individual pieces are generally collector curiosities rather than gemstones.

Geological facts

The bright white grains may be quartz or feldspar, while darker flecks could be biotite or other minerals. A close-up image, streak test, hardness test, and crystal examination would be needed for reliable identification.

Field identification & locations

Look for visible interlocking grains, glassy quartz, feldspar cleavage, and mica flakes; common sources include streambeds, weathered outcrops, landscaping gravel, and construction fill. Avoid acid testing unless carbonate minerals are suspected.