mineral

Blue Calcite

Calcium Carbonate (CaCO3)

AI-generated identification · may be incorrect

Hardness: 3 on Mohs scale; Color: Pale blue to sky blue with white banding; Luster: Vitreous to waxy; Crystal Structure: Trigonal/Hexagonal; Cleavage: Perfect rhombohedral; Specific Gravity: 2.71

Hardness: 3 on Mohs scale
Color: Pale blue to sky blue with white banding
Luster: Vitreous to waxy

Identified May 7, 2026More mineral →

Explore Blue Calcite in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Hardness: 3 on Mohs scale; Color: Pale blue to sky blue with white banding; Luster: Vitreous to waxy; Crystal Structure: Trigonal/Hexagonal; Cleavage: Perfect rhombohedral; Specific Gravity: 2.71

Formation & geological history

Formed through sedimentary processes or as a secondary mineral in igneous and metamorphic rocks. Often precipitates from calcium-rich solutions in caves or hot springs.

Uses & applications

Primarily used as decorative carvings, palm stones, and in metaphysical practices. Also used in the production of cement, lime, and as an acid neutralizer in industry.

Geological facts

Calcite is one of the most common minerals on Earth. Its name is derived from the Greek word 'chalix' meaning lime. It is known for its property of double refraction.

Field identification & locations

Identify in the field by its softness (can be scratched by a copper coin) and its strong reaction (effervescence) when exposed to dilute hydrochloric acid. Commonly found in Mexico, Brazil, and parts of the USA.