mineral

Milky quartz vein rock

Quartz, silicon dioxide (SiO₂), likely massive vein quartz with iron-oxide staining

AI-generated identification · may be incorrect

Typically hardness 7 Mohs, white to gray or honey-brown, vitreous to waxy luster, no cleavage, conchoidal fracture, and specific gravity about 2.65. The specimen appears massive and fractured rather than distinctly crystalline.

Identified September 6, 2026More mineral →

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Physical properties

Formation & geological history

Forms when silica-rich hydrothermal fluids fill fractures in host rock, later weathering and acquiring yellow-brown iron staining; the exposed surface does not establish a precise age. Common in veins associated with igneous, metamorphic, and sedimentary terrains.

Uses & applications

Used as silica feedstock, glass and ceramic material, abrasives, aggregate, and decorative stone; attractive pieces may be sold as display specimens, though this example appears ordinary.

Geological facts

Milky appearance results from microscopic fluid inclusions, fractures, and impurities scattering light. Honey coloration commonly reflects limonite or hematite coatings.

Field identification & locations

Identify by its glassy appearance, lack of cleavage, conchoidal fracture, and ability to scratch ordinary glass; a steel file will not scratch fresh quartz. Common worldwide in quartz veins, especially hydrothermal and metamorphic regions.