mineral

Likely quartz-rich mineral fragment

Quartz (SiO₂), possibly iron-stained or included quartz

AI-generated identification · may be incorrect

Translucent brown-gray material with a vitreous luster and irregular fracture; quartz hardness is Mohs 7, with no cleavage and a specific gravity near 2.65. The image is too limited to confirm crystal form or inclusions.

Identified August 10, 2026More mineral →

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Physical properties

Formation & geological history

Quartz commonly crystallizes from silica-rich hydrothermal fluids, pegmatites, and cavities in igneous or metamorphic rocks; brown coloration may result from iron oxides or other mineral inclusions. Its precise age and host rock cannot be determined visually.

Uses & applications

Quartz is used in glass, electronics, abrasives, countertops, and jewelry; attractive transparent or well-crystallized pieces are collected.

Geological facts

Quartz is one of Earth’s most abundant minerals and is highly resistant to weathering, making it common in sand and sediment.

Field identification & locations

Look for glassy luster, conchoidal fracture, lack of cleavage, and the ability to scratch ordinary glass. Common worldwide; acid testing, streak, hardness, and a loupe would improve identification.