mineral

Tumbled white stone, possibly milky quartz

Likely quartz (SiO₂); identification is uncertain from the photo

AI-generated identification · may be incorrect

Smooth, rounded, opaque white to cream, with a subdued vitreous-to-waxy luster. If quartz, hardness is 7 Mohs, crystal system trigonal, and cleavage is absent; the image alone does not confirm its composition.

Identified October 11, 2026More mineral →

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Physical properties

Formation & geological history

Quartz forms in many igneous, metamorphic, and hydrothermal settings and spans a vast range of geological ages. Its rounded shape suggests natural water wear or mechanical tumbling, but the source cannot be determined visually.

Uses & applications

Tumbled quartz is used for collecting, decoration, and inexpensive jewelry or crafts.

Geological facts

Milky quartz gets its cloudy appearance from microscopic fluid inclusions or defects. Many white stones look similar, including calcite, marble, and ceramic materials.

Field identification & locations

A scratch test can help distinguish quartz from softer calcite, but confirm identity with hardness and other tests; avoid testing valuable pieces. Common quartz localities include Brazil, Madagascar, and many regions worldwide.