mineral

Milky quartz-bearing rock

Quartz, silicon dioxide (SiO₂), likely massive milky quartz in a host rock

AI-generated identification · may be incorrect

White to gray, translucent, vitreous-to-waxy luster with irregular fracture and no obvious cleavage; quartz hardness is Mohs 7 and specific gravity about 2.65. The rough, weathered texture suggests an unpolished vein or quartz-rich fragment.

Identified September 22, 2026More mineral →

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Physical properties

Formation & geological history

Likely formed when silica-rich hydrothermal fluids filled fractures in older host rock, then cooled and crystallized; its exact geological age cannot be determined from the photograph. Common settings include igneous and metamorphic terrains.

Uses & applications

Used for glass, ceramics, abrasives, engineered stone, and as a collector specimen; translucent pieces may be cut or polished, though this specimen appears ordinary-grade.

Geological facts

Milky appearance results from microscopic fluid inclusions, fractures, or scattered impurities that diffuse light. Quartz is one of Earth’s most abundant and durable minerals.

Field identification & locations

Identify by its glassy luster, conchoidal fracture, lack of cleavage, and ability to scratch ordinary glass; a hardness or streak test can help confirm it. Common worldwide, especially in hydrothermal veins and pegmatites.