mineral

Orange Calcite

Calcium Carbonate (CaCO3)

Hardness: 3 on Mohs scale. Color: Orange to honey-yellow. Luster: Vitreous to waxy. Crystal system: Trigonal. Cleavage: Perfect rhombohedral in three directions.

Hardness: 3 on Mohs scale
Color: Orange to honey-yellow
Luster: Vitreous to waxy

Identified July 12, 2026More mineral →

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Physical properties

Hardness: 3 on Mohs scale. Color: Orange to honey-yellow. Luster: Vitreous to waxy. Crystal system: Trigonal. Cleavage: Perfect rhombohedral in three directions.

Formation & geological history

Formed through sedimentary processes, typically in marine environments where calcium stays in solution until precipitated by evaporation or biological activity. It can also form in hydrothermal veins.

Uses & applications

Used primarily as decorative stones, in carvings, for metaphysical collection, and historically as a source of lime in cement and agriculture.

Geological facts

Calcite is one of the most common minerals on Earth. Its orange variety is often acid-washed to give it a smooth, waxy feel and appearance, which is likely the case for this specimen.

Field identification & locations

Identify by its relatively low hardness (can be scratched by a copper coin or steel knife) and its effervescent reaction to weak acids like vinegar. Common in locations like Mexico, Brazil, and the USA.