mineral

Yellow Calcite (or Orange/Banded Calcite)

Calcium Carbonate (CaCO3)

AI-generated identification · may be incorrect

Hardness 3 on Mohs scale; color varies from pale yellow, honey, to orange with banding; vitreous to waxy/resinous luster; rhombohedral cleavage; trigonal crystal system; specific gravity around 2.71.

Identified October 3, 2026More mineral →

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Physical properties

Hardness 3 on Mohs scale; color varies from pale yellow, honey, to orange with banding; vitreous to waxy/resinous luster; rhombohedral cleavage; trigonal crystal system; specific gravity around 2.71.

Formation & geological history

Formed through sedimentary processes such as chemical precipitation in hot springs, cave speleothems, or marine evaporative environments; also crystallizes in hydrothermal veins.

Uses & applications

Popular for decorative carvings, polished eggs, spheres, and tumbled stones; used in metaphysical practices, mineral collections, and historically as an architectural stone.

Geological facts

Although labeled 'CITRINE' on the side, its fibrous, banded texture, waxy appearance, and low hardness indicate it is banded calcite rather than quartz citrine. Calcite readily fizzes (effervesces) when touched with dilute hydrochloric acid, unlike quartz.

Field identification & locations

Calcite can be easily distinguished in the field by being soft enough to be scratched by a copper coin or steel nail (hardness 3), distinct cleavage planes, and strong reaction with dilute acid. Major sources include Mexico, Pakistan, China, and the USA.