mineral

Tumbled milky quartz

Quartz (SiO₂)

AI-generated identification · may be incorrect

Mohs hardness 7; translucent white to pale cream, vitreous to slightly waxy luster, and hexagonal crystal structure. The rounded shape and polish indicate tumbling; specific gravity is about 2.65.

Identified October 14, 2026More mineral →

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Physical properties

Mohs hardness 7; translucent white to pale cream, vitreous to slightly waxy luster, and hexagonal crystal structure. The rounded shape and polish indicate tumbling; specific gravity is about 2.65.

Formation & geological history

Quartz crystallizes from silica-rich fluids and magmas in many rock types; its geological age varies widely. The pebble was likely naturally rounded or fractured, then mechanically tumbled and polished.

Uses & applications

Commonly used for jewelry, decorative objects, and mineral collections; quartz also has major industrial uses in glassmaking and electronics.

Geological facts

Quartz is one of Earth’s most abundant minerals and has no cleavage, breaking instead with a curved, conchoidal fracture.

Field identification & locations

Identify it by its glassy appearance, hardness (it can scratch glass), and lack of cleavage. Quartz occurs worldwide, including in veins, pegmatites, and sands; similar pale stones may require testing to distinguish from other minerals.