mineral

Milky quartz (likely quartz fragment)

Quartz, silicon dioxide (SiO₂)

AI-generated identification · may be incorrect

Hardness 7 Mohs; white to translucent, vitreous-to-waxy luster, uneven/conchoidal fracture, no cleavage, hexagonal crystal structure, and specific gravity about 2.65. The rounded shape suggests natural abrasion or human tumbling.

Identified August 23, 2026More mineral →

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Physical properties

Formation & geological history

Forms when silica-rich fluids crystallize in veins, cavities, or igneous rocks; its geological age can range from recent to billions of years. Commonly occurs in hydrothermal veins, granites, pegmatites, and alluvial gravels.

Uses & applications

Used for glass, ceramics, abrasives, engineered stone, and electronics; attractive translucent pieces are used decoratively and occasionally in jewelry. This small, ordinary specimen has limited commercial value.

Geological facts

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

Field identification & locations

Identify it by its pale translucent appearance, glassy fracture, lack of cleavage, and ability to scratch ordinary steel or glass; avoid confusing it with calcite, which is softer and cleaves readily. Common worldwide, including Brazil, the United States, Madagascar, and alpine regions.