mineral

Quartz Vein / Quartzite Specimens

Silicon Dioxide (SiO2)

AI-generated identification · may be incorrect

Hardness: 7 on Mohs scale. Color: White, milky, clear, gray, with iron oxide staining (orange/brown). Luster: Vitreous to greasy. Cleavage: None (conchoidal fracture). Specific Gravity: ~2.65.

Hardness: 7 on Mohs scale
Luster: Vitreous to greasy

Identified July 25, 2026More mineral →

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Physical properties

Hardness: 7 on Mohs scale. Color: White, milky, clear, gray, with iron oxide staining (orange/brown). Luster: Vitreous to greasy. Cleavage: None (conchoidal fracture). Specific Gravity: ~2.65.

Formation & geological history

Formed through hydrothermal precipitation in veins within metamorphic or igneous rocks, or through the metamorphism of quartz-rich sandstone (quartzite). Found in widespread geological environments globally.

Uses & applications

Used in construction aggregates, glass making, electronics (silicon source), abrasives, and landscape decor. Common rough specimens are favored by hobbyists and rockhound beginners.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. These specimens exhibit classic iron-staining along fractures, which occurs when iron-rich groundwater permeates tiny cracks in the stone.

Field identification & locations

Identified in the field by its ability to easily scratch glass, lack of cleavage (breaks with smooth curved surfaces), glassy luster, and resistance to chemical weathering. Found along gravel beds, mountain trails, and pegmatites worldwide.