Yellow Calcite

Physical Properties

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

Formation & Geological History

Forms through sedimentary processes such as chemical precipitation in marine environments or hydrothermal veins. It is found in deposits ranging from ancient Paleozoic to more recent Cenozoic eras.

Uses & Applications

Used as an ornamental stone, in metaphysical practices (healing crystals), as a source of lime in cement, and as a decorative polished palm stone.

Geological Facts

Calcite is one of the most common minerals on Earth. Yellow variations get their color from iron impurities. It exhibits double refraction (birefringence) in clear specimens.

Field Identification & Locations

Can be identified by its softness (can be scratched by a copper coin) and its effervescent reaction when exposed to dilute hydrochloric acid. Commonly found in Mexico, Brazil, and the USA.

Identified on: 5/2/2026

Mode: Standard