mineral

Tumbled milky quartz

Quartz (silicon dioxide, SiO₂)

AI-generated identification · may be incorrect

Hardness 7 Mohs; creamy white, translucent to opaque, with a vitreous-to-waxy luster and massive, non-crystalline appearance. Quartz has no cleavage, conchoidal fracture, and specific gravity about 2.65.

Identified August 11, 2026More mineral →

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Physical properties

Formation & geological history

Forms when silica-rich fluids crystallize in veins, cavities, and igneous or metamorphic rocks; the milky appearance comes from microscopic fluid inclusions or fractures. Quartz is abundant from Precambrian rocks through modern deposits.

Uses & applications

Used for lapidary items, tumbled stones, countertops, glass, ceramics, electronics, and abrasives; this small polished specimen has modest decorative or educational value.

Geological facts

Milky quartz is one of the most common quartz varieties and may grade into rose quartz or other inclusion-rich forms. Its hardness allows it to scratch ordinary glass and steel.

Field identification & locations

Common worldwide, especially in hydrothermal veins, pegmatites, and river gravels; likely identification is confirmed by hardness, glassy fracture, and lack of cleavage. The rounded shape indicates tumbling or natural water wear.