mineral

Tumbled yellow calcite

Calcite (CaCO₃)

AI-generated identification · may be incorrect

Pale yellow, translucent, vitreous to pearly luster, with visible internal cleavage/fractures; Mohs hardness 3 and trigonal crystal system. The polished oval shape and appearance are consistent with calcite, though photo identification is not definitive.

Identified October 10, 2026More mineral →

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Physical properties

Formation & geological history

Calcite forms in many geological settings, including limestone and hydrothermal veins, through precipitation or alteration. It occurs from ancient rocks to modern deposits; the specimen’s specific age and source cannot be determined from the image.

Uses & applications

Used for ornamental carvings, decorative stones, and mineral collecting; calcite is also an important industrial source of lime and cement ingredients.

Geological facts

Calcite effervesces in dilute acid and has perfect rhombohedral cleavage; its double refraction is especially noticeable in clear crystals.

Field identification & locations

A relatively soft stone that can be scratched with a steel point and should be kept away from acids. Common worldwide, including in limestone regions and hydrothermal deposits.