mineral

Clear quartz crystal pendant

Quartz (silicon dioxide, SiO₂)

AI-generated identification · may be incorrect

Likely a rough, translucent quartz fragment wrapped in wire. Quartz has Mohs hardness 7, a vitreous luster, and a hexagonal crystal structure; it has no cleavage and commonly breaks with conchoidal fractures. The gray-blue appearance may come from lighting or inclusions.

Identified October 10, 2026More mineral →

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Physical properties

Formation & geological history

Quartz forms in many geological settings, including silica-rich fluids in veins and cavities and crystallization from magma. It occurs in rocks of many ages; the image does not establish the specimen’s source or age.

Uses & applications

Quartz is widely used in glassmaking, electronics, and construction; clear quartz is also cut for jewelry and collected as a mineral specimen.

Geological facts

Quartz is one of Earth’s most abundant minerals and has piezoelectric properties, producing an electrical response under pressure.

Field identification & locations

Look for glassy luster, hardness sufficient to scratch ordinary glass, and lack of cleavage; common worldwide in veins, pegmatites, and geodes. The photo alone cannot confirm the identification.