mineral

Quartz vein in weathered host rock

Quartz (SiO₂), likely in a weathered metamorphic or igneous matrix

AI-generated identification · may be incorrect

Milky to translucent quartz with vitreous luster, irregular fracture, and hardness 7 Mohs; the gray-brown matrix appears finer-grained and strongly weathered. Crystal faces are not clearly visible, so it is likely massive vein quartz rather than a crystal cluster.

Identified August 19, 2026More mineral →

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Physical properties

Formation & geological history

Quartz-rich fluids deposited silica in a fracture, probably during hydrothermal activity; subsequent weathering decomposed the surrounding rock. The specimen’s precise geologic age and host rock cannot be determined from the image.

Uses & applications

Common quartz is used in glass, ceramics, abrasives, engineered stone, and electronics; attractive pieces may be sold as mineral specimens, though this example appears primarily educational or field-collected.

Geological facts

Quartz is one of Earth’s most abundant minerals and is chemically resistant, often remaining as bright, durable veins after the host rock erodes.

Field identification & locations

Look for glassy luster, translucent edges, no cleavage, and the ability to scratch ordinary glass. Common occurrences include fractures in granite, schist, gneiss, volcanic rocks, and sedimentary formations.