metamorphic

Tumbled white stone beads, likely marble or quartz

Undetermined; possibly marble (recrystallized calcite, CaCO₃) or milky quartz (SiO₂)

AI-generated identification · may be incorrect

Rounded, opaque-to-translucent white pieces with a smooth finish and dull to waxy luster. If marble, hardness is about 3 Mohs; if quartz, about 7; the image does not show enough detail to distinguish them reliably.

Identified September 23, 2026More metamorphic →

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Physical properties

Formation & geological history

These appear to be polished geological material, but the rock type and source cannot be confirmed visually. Marble forms by limestone metamorphism; quartz occurs in veins and many igneous and metamorphic rocks.

Uses & applications

Commonly used as decorative aquarium or craft media, landscaping fill, and polished craft material; suitability for aquariums depends on composition.

Geological facts

A vinegar or dilute-acid test can help identify calcite-rich marble: it fizzes, whereas quartz does not.

Field identification & locations

The uniform rounded shape and smooth surface indicate tumbling or manufactured shaping, not natural crystal form. A scratch test or acid test on a piece would help identify the material.