mineral

Tumbled banded calcite (possibly honey or banded calcite)

Calcite, CaCO₃

AI-generated identification · may be incorrect

Cream, tan, and pale gray translucent bands with a waxy to vitreous polish; calcite has Mohs hardness 3, trigonal crystal structure, perfect rhombohedral cleavage, and specific gravity about 2.7. The smooth rounded shape indicates tumbling or polishing.

Identified October 11, 2026More mineral →

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Physical properties

Formation & geological history

Calcite commonly precipitates from mineral-rich groundwater in caves, veins, and sedimentary settings; banding forms as conditions change during successive layers of deposition. Its age cannot be determined from appearance alone.

Uses & applications

Used as a decorative tumbled stone, in collections, and as a source of lime and cement; this small polished piece is mainly ornamental.

Geological facts

Calcite effervesces in dilute acid and is much softer than quartz, so it can be scratched by a steel knife. The exact variety is difficult to establish from the image alone.

Field identification & locations

Look for pale layered bands and test cautiously for softness or acid reaction; common sources include limestone and hydrothermal deposits worldwide. Avoid acid testing a polished collectible unless you accept surface damage.