mineral

Quartz Boulder

Silicon Dioxide (SiO2)

Hardness: 7 on Mohs scale. Color: White with orange-brown iron staining. Luster: Vitreous to greasy. Crystal structure: Trigonal. Cleavage: None (conchoidal fracture). Specific gravity: 2.65.

Hardness: 7 on Mohs scale
Color: White with orange-brown iron staining
Luster: Vitreous to greasy

Identified July 31, 2026More mineral →

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Physical properties

Hardness: 7 on Mohs scale. Color: White with orange-brown iron staining. Luster: Vitreous to greasy. Crystal structure: Trigonal. Cleavage: None (conchoidal fracture). Specific gravity: 2.65.

Formation & geological history

Formed through hydrothermal processes, crystallization from silica-rich fluids in pegmatites and veins, or as a primary component in igneous, metamorphic, and sedimentary rocks over millions of years.

Uses & applications

Used in landscaping, construction aggregate, glass manufacturing, electronics, and ornamental stone.

Geological facts

Quartz is one of the most abundant minerals in Earth's continental crust and exhibits piezoelectric properties, meaning it can generate an electrical charge under mechanical stress.

Field identification & locations

Easily identified by its high hardness (scratches glass), lack of cleavage, and glassy luster. Commonly found worldwide in various geological settings.