mineral

Orange Calcite

Calcium Carbonate (CaCO3)

Hardness: 3 on Mohs scale; Color: Pale orange to deep amber; Luster: Vitreous to waxy/soapy; Crystal Structure: Trigonal; Cleavage: Perfect rhombohedral in three directions; Specific Gravity: 2.71

Hardness: 3 on Mohs scale
Color: Pale orange to deep amber
Luster: Vitreous to waxy/soapy

Identified April 5, 2026More mineral →

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Physical properties

Hardness: 3 on Mohs scale; Color: Pale orange to deep amber; Luster: Vitreous to waxy/soapy; Crystal Structure: Trigonal; Cleavage: Perfect rhombohedral in three directions; Specific Gravity: 2.71

Formation & geological history

Formed through sedimentary processes, primarily from the chemical precipitation of calcium carbonate in marine environments or through hydrothermal activity. Found in massive forms or as rhombohedral crystals.

Uses & applications

Used as a decorative stone, in lapidary work for carvings and cabochons, as an acid neutralizer in chemical industries, and widely collected as a metaphysical or healing stone.

Geological facts

Calcite is one of the most common minerals on Earth. Its name is derived from the Greek word 'chalix' meaning lime. Orange calcite specifically gets its color from tiny inclusions of hematite or other iron oxides.

Field identification & locations

Identify in the field by its softness (can be scratched by a copper penny) and its strong reaction (effervescence) when exposed to cold dilute hydrochloric acid or vinegar. Often has a distinct 'waxy' feel to the touch.