mineral

Yellow Calcite

Calcium Carbonate (CaCO3)

Hardness: 3 on Mohs scale; Color: Pale yellow to golden honey; Luster: Vitreous to waxy; Crystal Structure: Trigonal/Rhombohedral; Cleavage: Perfect rhombohedral in three directions; Specific Gravity: 2.71

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

Identified March 25, 2026More mineral →

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Physical properties

Formation & geological history

Formed through sedimentary processes, primarily from the chemical precipitation of calcium carbonate in marine environments or hydrothermal veins. It can be found in rocks of various ages, from Precambrian to recent holocene deposits.

Uses & applications

Used in the manufacture of cement and mortar, as a flux in glass making, in the chemical industry, and as decorative gemstones or tumbled stones for metaphysical collecting.

Geological facts

Yellow Calcite is known as a 'stone of the mind,' believed by some to enhance mental clarity. One of its most unique optical properties is double refraction, where light passing through a clear specimen splits into two rays.

Field identification & locations

Identify in the field by its softness (can be scratched by a copper penny) and its strong effervescence (bubbling) when in contact with dilute hydrochloric acid. It is commonly found in limestone and marble quarries globally.