mineral

Tumbled milky quartz

Quartz, silicon dioxide (SiO₂)

AI-generated identification · may be incorrect

A smooth, opaque-to-translucent white pebble with a vitreous luster; quartz has Mohs hardness 7, a trigonal crystal structure, no cleavage, and specific gravity about 2.65. The image alone cannot confirm the material, but its appearance is consistent with milky quartz.

Identified October 14, 2026More mineral →

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Physical properties

Formation & geological history

Quartz forms in igneous and hydrothermal settings and in veins; milky color results from microscopic fluid or gas inclusions. This piece has been mechanically tumbled, and its geological age cannot be determined from the image.

Uses & applications

Used for jewelry, ornaments, and mineral collections; quartz is also important in glassmaking, electronics, and industrial abrasives.

Geological facts

Quartz is one of Earth’s most abundant minerals and commonly occurs in many rock types.

Field identification & locations

Look for hardness that scratches glass, lack of cleavage, and a glassy fracture; common sources include Brazil, the United States, and Madagascar. Similar-looking white stones can be distinguished with proper hardness and mineral tests.