Orange Calcite

Physical Properties

Hardness: 3 on Mohs scale; Color: Orange to honey-gold with white banding; Luster: Vitreous to waxy; Crystal Structure: Trigonal/Rhombohedral; Cleavage: Perfect rhombohedral; Specific Gravity: 2.71

Formation & Geological History

Formed through sedimentary processes, often precipitated from calcium-rich solutions in hydrothermal veins or marine environments. It can also be found in metamorphic rocks like marble.

Uses & Applications

Used primarily for decorative carvings, lapidary work (tumbled stones), metaphysical collection, and as a source of calcium in chemical industries.

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, where light rays split when passing through clear specimens.

Field Identification & Locations

Identifiable by its 3-way rhombohedral cleavage and its strong effervescent reaction to cold dilute hydrochloric acid. It is much softer than quartz or agate, which it is sometimes confused with.

Identified on: 5/7/2026

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