mineral

Milky quartz vein fragment

Quartz (SiO₂), likely massive milky quartz with minor iron-oxide staining and possible feldspar/mica inclusions

AI-generated identification · may be incorrect

Hardness 7 Mohs; white to translucent, vitreous-to-waxy luster, no cleavage, conchoidal fracture, and trigonal crystal structure. The rough surface and rusty brown patches suggest weathering and iron-oxide staining.

Identified August 24, 2026More mineral →

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Physical properties

Formation & geological history

Likely formed when silica-rich hydrothermal fluids filled fractures in older host rock, later exposed by erosion; its precise geological age cannot be determined from the image. Common in granitic, metamorphic, and hydrothermal vein environments.

Uses & applications

Used for glass, silicon, engineered stone, abrasives, and ornamental specimens; attractive translucent pieces may be cut or polished, though this specimen appears mainly a collector sample.

Geological facts

Milky appearance results from microscopic fluid inclusions, fractures, or impurities scattering light. Quartz is among Earth’s most abundant minerals and is resistant to weathering, often concentrating in stream gravels and soil.

Field identification & locations

Identify by its glassy appearance, lack of cleavage, conchoidal fracture, and ability to scratch ordinary glass. Common worldwide, especially in quartz veins and granite-bearing regions.