mineral

Milky quartz fragments

Quartz, silicon dioxide (SiO₂)

AI-generated identification · may be incorrect

Typically white to translucent with a vitreous-to-waxy luster, irregular fracture, and hardness 7 on the Mohs scale; crystals are trigonal, though these pieces appear massive and weathered. Specific gravity is about 2.65.

Identified August 23, 2026More mineral →

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Physical properties

Formation & geological history

Formed when silica-rich fluids crystallized in veins, cavities, or igneous rocks; the exact geological age and source cannot be determined from the image. The surrounding material appears to be gravelly sediment or weathered rock.

Uses & applications

Common quartz is used in glass, ceramics, abrasives, engineered stone, and electronics; attractive pieces are sold as inexpensive display or lapidary material.

Geological facts

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

Field identification & locations

Identify it by its white translucency, glassy appearance, lack of cleavage, and ability to scratch ordinary glass; a steel knife will not scratch it. Common worldwide, especially in hydrothermal veins and granitic terrains.