mineral

Orange Calcite

Calcium Carbonate (CaCO3)

Hardness: 3 on Mohs scale; Color: Orange, peach, or honey-yellow; Luster: Vitreous to waxy; Crystal structure: Trigonal/Rhombohedral; Cleavage: Perfect rhombohedral in three directions; Specific gravity: 2.71.

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

Identified April 6, 2026More mineral →

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Physical properties

Formation & geological history

Formed through sedimentary processes, often precipitated from marine environments or hydrothermal veins. This color is typically caused by inclusions of hematite or iron oxide during crystal growth.

Uses & applications

Primarily used for decorative carvings, lapidary work (cabochons), and metaphysical/collecting purposes. Large scale calcite is used in the manufacture of cement and lime.

Geological facts

Calcite is one of the most common minerals on Earth. Orange calcite specifically is known for its ability to fluoresce under UV light in some specimens due to trace impurities.

Field identification & locations

Identify in the field by its softness (it can be scratched by a copper penny) and its vigorous reaction (fizzing) when exposed to dilute hydrochloric acid. Commonly found in Mexico and Brazil.