mineral

Clear quartz crystal fragment

Quartz, silicon dioxide (SiO₂)

AI-generated identification · may be incorrect

Transparent to translucent and colorless, with a vitreous luster and conchoidal-looking irregular breaks; quartz has Mohs hardness 7, a trigonal crystal structure, no cleavage, and specific gravity about 2.65. The image alone cannot confirm the identification; clear calcite or glass-like material can look similar.

Identified September 29, 2026More mineral →

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Physical properties

Formation & geological history

Quartz crystallizes from silica-rich fluids and melts in many geological settings; its mineral age depends on the host deposit and cannot be determined from the photo.

Uses & applications

Quartz is widely used in glassmaking, electronics, and industrial abrasives; clear crystals are also used in jewelry and mineral collections.

Geological facts

Quartz is one of Earth’s most abundant minerals and has piezoelectric properties, which make it useful in timing and sensing devices.

Field identification & locations

Look for hardness sufficient to scratch glass, no cleavage, and a glassy fracture; common worldwide in veins, pegmatites, and sedimentary deposits. This appears to be a small, irregular fragment rather than a well-formed crystal.