mineral

Tumbled white stone, likely milky quartz

Quartz (SiO₂), probable; identification is uncertain from the photo alone

AI-generated identification · may be incorrect

Opaque to translucent white, smooth and rounded; quartz has Mohs hardness 7, a vitreous luster when freshly broken, and no cleavage. The polished surface appears matte or softly glossy.

Identified October 14, 2026More mineral →

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Physical properties

Opaque to translucent white, smooth and rounded; quartz has Mohs hardness 7, a vitreous luster when freshly broken, and no cleavage. The polished surface appears matte or softly glossy.

Formation & geological history

If quartz, it formed as silica crystallized in veins or cavities and was later naturally rounded or mechanically tumbled. Quartz occurs in rocks of many geological ages.

Uses & applications

Common as a decorative or collectible tumbled stone; quartz is also used in glassmaking, electronics, and construction materials.

Geological facts

Quartz is one of Earth’s most abundant minerals; milky appearance usually comes from microscopic inclusions or fluid-filled defects.

Field identification & locations

A hardness or streak test, or inspection for conchoidal fracture, can help distinguish quartz from softer white stones such as calcite. Quartz is widespread worldwide; the photo does not establish the exact material or locality.