mineral

Quartz Vein on Matrix

Silicon Dioxide (SiO2)

Hardness: 7 on Mohs scale; Color: Milky white to translucent with yellowish oxidation; Luster: Vitreous to greasy; Crystal Structure: Trigonal; Cleavage: None/Conchoidal fracture; Specific Gravity: 2.65

Hardness: 7 on Mohs scale
Color: Milky white to translucent with yellowish oxidation
Luster: Vitreous to greasy

Identified June 30, 2026More mineral →

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Physical properties

Formation & geological history

Formed through hydrothermal processes where silica-rich fluids permeate cracks in pre-existing host rock (likely granite or metamorphic gneiss) and crystallize during cooling. Can form across various geological ages from Precambrian to Cenozoic.

Uses & applications

Quartz is used in glassmaking, electronics (piezoelectric properties), abrasives, and as a refractory material. Aesthetic specimens like this are valued by mineral collectors.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. These veins are often 'paths' for prospectors because they frequently host precious metals like gold.

Field identification & locations

Identify in the field by its hardness (it will scratch glass), lack of cleavage, and resistance to chemical weathering. This specimen shows a distinct white quartz vein cutting through a darker, weathered host rock.