mineral

Tumbled milky quartz

Quartz (silicon dioxide, SiO₂)

AI-generated identification · may be incorrect

Typically Mohs hardness 7, vitreous-to-waxy luster, white to translucent appearance, and a hexagonal crystal structure; the rounded shape indicates tumbling and does not show cleavage. Specific gravity is about 2.65.

Identified August 15, 2026More mineral →

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Physical properties

Formation & geological history

Quartz crystallizes from silica-rich igneous and hydrothermal fluids and is also common in metamorphic veins and sedimentary rocks; individual crystals may range from Precambrian to recent. The specimen has been mechanically polished.

Uses & applications

Used in glass, ceramics, electronics, abrasives, countertops, and lapidary objects; attractive pieces are sold as inexpensive décor or collecting specimens.

Geological facts

Milky color results from microscopic fluid inclusions, fractures, or defects that scatter light. Quartz is one of Earth’s most abundant and chemically resistant minerals.

Field identification & locations

Identify it by its glassy/waxy luster, lack of visible cleavage, hardness sufficient to scratch ordinary glass, and white translucent body; common worldwide, especially in quartz veins and pegmatites.