mineral

Orange Calcite (Banded Honey Calcite)

Calcium Carbonate (CaCO3)

Hardness: 3 on Mohs scale; Color: Honey-yellow to pale orange; Luster: Vitreous to waxy; Crystal Structure: Trigonal/Rhombohedral; Cleavage: Perfect rhombohedral in three directions; Specific Gravity: 2.71.

Hardness: 3 on Mohs scale
Color: Honey-yellow to pale orange
Luster: Vitreous to waxy

Identified June 28, 2026More mineral →

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Physical properties

Formation & geological history

Formed through chemical precipitation in sedimentary environments, often in caves as flowstone or around hot springs (travertine), and in hydrothermal veins. Geological age varies widely by location but is commonly found in formations from the Paleozoic to Cenozoic eras.

Uses & applications

Used primarily for decorative carvings, lapidary work, and architectural stone. It is also a popular specimen for mineral collectors and used in the manufacturing of cement and lime for industrial purposes.

Geological facts

Calcite is one of the most common minerals on Earth. It exhibits double refraction (birefringence), where light passing through a clear crystal splits into two rays. It reacts strongly (fizzes) when a drop of cold dilute hydrochloric acid is applied.

Field identification & locations

Identify in the field by its distinct waxy luster, orange-amber color, and softness (it can be scratched by a copper coin). It is commonly found in Mexico, Brazil, and the USA (Utah). Collectors should look for the characteristic 60/120 degree cleavage angles if broken.

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