mineral

Likely quartz-rich rock fragment

Quartz (silicon dioxide, SiO₂), possibly in a granitic or pegmatitic matrix

AI-generated identification · may be incorrect

Small gray-white, translucent to opaque fragments with a glassy to dull luster; quartz has Mohs hardness 7, no cleavage, conchoidal fracture, hexagonal crystal structure, and specific gravity about 2.65. The blurred image prevents confident identification of texture or associated minerals.

Identified August 17, 2026More mineral →

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Physical properties

Formation & geological history

Quartz crystallizes from silica-rich hydrothermal fluids or cooling magma; associated rock may be igneous granite or pegmatite. Its age depends on locality, ranging from ancient Precambrian material to geologically recent veins.

Uses & applications

Common quartz is used in glass, ceramics, abrasives, electronics, and engineered stone; clear attractive specimens may be used for lapidary work or collecting.

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 hardness sufficient to scratch glass, lack of cleavage, and a six-sided crystal habit or curved fracture. Common worldwide, especially in granite, pegmatite, and hydrothermal veins.