Orange Calcite

Physical Properties

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

Formation & Geological History

Formed primarily through sedimentary processes by chemical precipitation from calcium-rich solutions, or in hydrothermal veins. Common in limestone environments.

Uses & Applications

Used in the manufacture of cement and lime, as an acid neutralizer in the chemical industry, and widely used for decorative carvings, palm stones, and metaphysical collecting.

Geological Facts

Calcite is one of the most common minerals on Earth and is the primary constituent of limestone and marble. It exhibits double refraction (birefringence) and reacts strongly to dilute hydrochloric acid.

Field Identification & Locations

Identify by its relative softness (can be scratched by a copper coin) and rhombohedral cleavage. Commonly found in Mexico, Brazil, and the USA. Collectors look for saturation of color and clarity.

Identified on: 5/5/2026

Mode: Standard