mineral

Yellow Calcite

Calcium Carbonate (CaCO3)

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

Hardness: 3 on Mohs scale
Color: Pale yellow to deep golden
Luster: Vitreous to waxy

Identified April 24, 2026More mineral →

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Physical properties

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

Formation & geological history

Formed through sedimentary processes, chemical precipitation in caves (as stalactites/stalagmites), or in hydrothermal veins. Found in various geological settings ranging from Precambrian to recent times.

Uses & applications

Used primarily for ornamental purposes, jewelry (pendants/beads), metaphysical practices, and as a source of calcium in industrial chemical applications.

Geological facts

Yellow Calcite is known for its ability to double-refract light (birefringence). It is also highly reactive to dilute hydrochloric acid, which causes it to effervesce or fizz.

Field identification & locations

Identify in the field by its rhombohedral cleavage and relative softness (can be scratched by a copper coin). It is commonly found in Mexico, Brazil, and the USA. Collectors look for clarity and intensity of the honey-yellow hue.