mineral

Milky quartz-rich rock

Quartz (SiO₂), likely massive quartz in a quartz vein or quartzite

AI-generated identification · may be incorrect

White to gray, translucent patches, vitreous to dull luster, irregular fracture, no obvious cleavage; Mohs hardness 7 and specific gravity about 2.65. Brown-gray areas likely iron-oxide staining or attached host rock.

Identified August 25, 2026More mineral →

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Physical properties

Formation & geological history

Formed when silica-rich hydrothermal fluids deposited quartz in fractures, or when quartz-rich sediment was metamorphosed; the specimen’s exact age and setting cannot be determined from the image. Commonly associated with granite, metamorphic rocks, and ore veins.

Uses & applications

Used as a silica source for glass, ceramics, abrasives, and engineered stone; attractive pieces may be collected, but this specimen appears more typical of common field material than jewelry grade.

Geological facts

Quartz is one of Earth’s most abundant minerals and commonly forms six-sided crystals, although massive quartz lacks visible crystal faces. Milky color results mainly from microscopic fluid inclusions and fractures.

Field identification & locations

Identify by its glassy appearance, lack of cleavage, hardness sufficient to scratch ordinary glass, and resistance to steel. Common worldwide, especially in quartz veins and mountainous crystalline terrains.