Yellow Calcite

Physical Properties

Hardness: 3 on Mohs scale; Color: Pale yellow to deep golden orange; Luster: Vitreous to waxy; Crystal Structure: Trigonal/Hexagonal; Cleavage: Perfect rhombohedral; Specific Gravity: 2.71

Formation & Geological History

Forms in sedimentary environments through chemical precipitation or in metamorphic environments. It commonly forms in hydrothermal veins or as a constituent of limestone and marble.

Uses & Applications

Used as a decorative stone, in metaphysical practices, as a source of lime in cement, and as a collector's specimen. High-purity calcite is used in optical instruments.

Geological Facts

Calcite is one of the most common minerals on Earth. Yellow calcite is often associated with the 'Solar Plexus' in spiritual traditions. It exhibits double refraction (birefringence), where light passing through it splits into two rays.

Field Identification & Locations

Can be identified in the field by its distinctive rhombohedral cleavage and its vigorous reaction (effervescence) to cold dilute hydrochloric acid. It is found globally, with large deposits in Mexico, Brazil, and the USA.

Identified on: 4/29/2026

Mode: Standard