mineral

Orange Calcite

Calcium Carbonate (CaCO3)

Hardness: 3 on Mohs scale; Color: Orange, yellow-orange, honey; Luster: Vitreous to waxy/greasy; Crystal Structure: Trigonal/Hexagonal; Cleavage: Perfect rhombohedral; Specific Gravity: 2.71

Hardness: 3 on Mohs scale
Color: Orange, yellow-orange, honey
Luster: Vitreous to waxy/greasy

Identified May 26, 2026More mineral →

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Physical properties

Hardness: 3 on Mohs scale; Color: Orange, yellow-orange, honey; Luster: Vitreous to waxy/greasy; Crystal Structure: Trigonal/Hexagonal; Cleavage: Perfect rhombohedral; Specific Gravity: 2.71

Formation & geological history

Formed primarily through sedimentation in marine environments or through precipitation in hot springs and caves. It can also form during metamorphism of limestone into marble. Common in sedimentary basins worldwide.

Uses & applications

Used as an ornamental stone, in carvings, and as a popular healing crystal in metaphysical circles. In industrial form, calcite is used in construction and as a calcium supplement.

Geological facts

Orange Calcite is unique for its often 'waxy' or 'soapy' feel when polished. It is a very common carbonate mineral and is the primary constituent of limestone and marble.

Field identification & locations

Identify by its softness (it can be scratched by a copper coin) and its energetic reaction (fizzing) when exposed to cold dilute hydrochloric acid. Commonly found in Mexico, Brazil, and the USA.