mineral

Clear Quartz

Quartz (Silicon dioxide, SiO2)

AI-generated identification · may be incorrect

Hardness: 7 on Mohs scale. Color: Colorless/transparent. Luster: Vitreous (glassy). Crystal structure: Trigonal. Cleavage: None, exhibits conchoidal fracture. Specific gravity: 2.65.

Hardness: 7 on Mohs scale
Color: Colorless/transparent
Luster: Vitreous (glassy)

Identified September 24, 2026More mineral →

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Physical properties

Hardness: 7 on Mohs scale. Color: Colorless/transparent. Luster: Vitreous (glassy). Crystal structure: Trigonal. Cleavage: None, exhibits conchoidal fracture. Specific gravity: 2.65.

Formation & geological history

Forms in a wide variety of geological environments, most notably in igneous rocks like pegmatites, hydrothermal veins, and metamorphic rocks. Can form over millions of years as silica-rich solutions cool and crystallize.

Uses & applications

Used extensively in jewelry, electronics (due to piezoelectric properties for oscillators/watches), optics, and glassmaking. Highly popular among collectors and for spiritual/metaphysical uses.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. Clear quartz is also known as rock crystal. The inclusions seen in this piece (the brownish fractures/dirt) are common in tumbled natural stones.

Field identification & locations

Identified by its hardness (scratches glass), lack of cleavage, glassy luster, and transparency. Commonly found worldwide. Tumbled pieces like this are often found in rock shops.