mineral

Milky quartz-rich rock

Quartz, crystalline silica (SiO₂), likely massive milky quartz with minor feldspar or mica

AI-generated identification · may be incorrect

White to gray, translucent patches, vitreous to pearly luster, uneven fracture, and no obvious cleavage; quartz hardness is Mohs 7 and specific gravity about 2.65. The granular texture suggests a quartz vein or quartz-rich metamorphic rock rather than a single clear crystal.

Identified August 25, 2026More mineral →

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Physical properties

Formation & geological history

Likely formed when silica-rich hydrothermal fluids filled fractures, or as quartz recrystallized during metamorphism; the exact geological age cannot be determined from the image. Such material occurs in veins, pegmatites, and metamorphic terrains.

Uses & applications

Used for construction aggregate, silica products, countertops, and ornamental specimens; attractive pieces may be cut or polished, though this specimen appears low-grade for jewelry.

Geological facts

Milky color results from microscopic fluid inclusions, fractures, and impurities that scatter light. Quartz commonly resists weathering and remains prominent in soil, gravel, and stream deposits.

Field identification & locations

Look for hardness sufficient to scratch ordinary glass, lack of cleavage, and a white streak; a steel knife should not scratch it. Common worldwide, especially in hydrothermal veins and quartz-rich metamorphic belts.