mineral

Milky quartz-rich vein rock

Quartz, SiO₂, likely massive or microcrystalline quartz

AI-generated identification · may be incorrect

Hardness 7; white to gray translucent color, vitreous-to-waxy luster, no obvious cleavage, conchoidal fracture, and irregular massive crystal structure. Brown staining likely reflects iron oxides or host-rock inclusions.

Identified August 10, 2026More mineral →

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Physical properties

Formation & geological history

Formed when silica-rich hydrothermal fluids filled fractures and crystallized, commonly during igneous or metamorphic activity; its exact geological age cannot be determined from the image.

Uses & applications

Used as a silica source for glass, ceramics, and engineered stone; attractive pieces are collected, though this specimen is not gem quality.

Geological facts

The cloudy appearance results from microscopic fluid inclusions, fractures, and impurities. Quartz is one of Earth’s most abundant and chemically resistant minerals.

Field identification & locations

Identify it by its glassy translucence, lack of cleavage, conchoidal fracture, and ability to scratch ordinary glass; it commonly occurs in veins in granite, metamorphic rocks, and ore deposits worldwide.