mineral

Tumbled cream-colored stone, likely calcite

Likely calcite (CaCO₃); visual identification is uncertain

AI-generated identification · may be incorrect

Opaque to slightly translucent, cream-white, with a polished, waxy-to-vitreous surface. If calcite, hardness is 3 Mohs and crystals are trigonal; the photo does not show cleavage or diagnostic tests.

Identified October 14, 2026More mineral →

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Physical properties

Opaque to slightly translucent, cream-white, with a polished, waxy-to-vitreous surface. If calcite, hardness is 3 Mohs and crystals are trigonal; the photo does not show cleavage or diagnostic tests.

Formation & geological history

Calcite commonly forms in limestone, marble, and hydrothermal veins through precipitation or recrystallization; these processes span much of Earth’s geological history. The rounded shape and polish indicate human tumbling.

Uses & applications

Used as a decorative or collecting stone; calcite also has major industrial uses in cement, lime, and construction aggregate.

Geological facts

A drop of dilute acid fizzes on calcite, and it can be scratched with a copper coin. Similar-looking tumbled stones may instead be quartz or another mineral.

Field identification & locations

The image alone cannot confirm the identification; check hardness and acid reaction, or have it tested. Calcite occurs worldwide, especially in limestone and marble regions.