mineral

Quartz Vein on Matrix

Silicon Dioxide (SiO2)

Hardness: 7 on Mohs scale; Color: Milky white to translucent with tan/purple host rock; Luster: Vitreous (glassy) to waxy; Structure: Hexagonal (trigonal); Cleavage: None (conchoidal fracture).

Hardness: 7 on Mohs scale
Color: Milky white to translucent with tan/purple host rock
Luster: Vitreous (glassy) to waxy

Identified March 14, 2026More mineral →

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Physical properties

Hardness: 7 on Mohs scale; Color: Milky white to translucent with tan/purple host rock; Luster: Vitreous (glassy) to waxy; Structure: Hexagonal (trigonal); Cleavage: None (conchoidal fracture).

Formation & geological history

Formed through hydrothermal precipitation where mineral-rich hot water circulates through fractures in tectonic host rocks. These veins can form over millions of years as fluids cool and deposit silica.

Uses & applications

Quartz is used in glass making, electronics (due to piezoelectricity), and as an abrasive. Specimens like this are primarily used for education, home decor, or as beginner level collectibles.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. Massive quartz veins like this one are often indicators for prospectors searching for gold or silver.

Field identification & locations

Identify in the field by its ability to scratch glass (hardness 7) and its lack of cleavage. Look for 'vugs' or small cavities where crystals may have grown. Found globally in almost all geological environments.