mineral

Quartz crystal cluster

Quartz (silicon dioxide, SiO₂)

AI-generated identification · may be incorrect

Typically Mohs hardness 7, vitreous luster, transparent to translucent, and hexagonal crystal structure; this specimen appears pale smoky, rose, or iron-stained rather than strongly colored. Quartz has no true cleavage and commonly shows conchoidal fracture; specific gravity is about 2.65.

Identified September 5, 2026More mineral →

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Physical properties

Formation & geological history

Forms when silica-rich fluids crystallize in cavities, veins, or hydrothermal deposits, commonly during igneous or metamorphic activity. The exact age and locality cannot be determined from the photograph.

Uses & applications

Used for glass, electronics, abrasives, and engineered stone; attractive clusters are sold as decorative or collector specimens, though this example appears modest in quality.

Geological facts

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

Field identification & locations

Identify by its glassy luster, hardness sufficient to scratch ordinary glass, lack of cleavage, and pointed/prismatic crystal faces. Common localities include Brazil, Arkansas, Madagascar, and Alpine regions.