mineral

Honey calcite (orange calcite)

Calcite, calcium carbonate (CaCO₃)

AI-generated identification · may be incorrect

Typically honey-yellow to orange, translucent to opaque, with a vitreous to pearly luster and trigonal crystal structure; Mohs hardness 3, perfect rhombohedral cleavage, and specific gravity about 2.71. The rounded, rough surface suggests a natural or lightly tumbled fragment.

Identified September 14, 2026More mineral →

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Physical properties

Formation & geological history

Forms in sedimentary limestone, hydrothermal veins, caves, and metamorphosed carbonate rocks through precipitation or recrystallization. Calcite deposits range from ancient Precambrian formations to modern cave and vein deposits.

Uses & applications

Used for cement, lime, aggregate, soil treatment, and optical calcite specimens; attractive orange material is sold to collectors and occasionally used in carvings or cabochons.

Geological facts

Calcite effervesces strongly with dilute hydrochloric acid or vinegar, especially when powdered; it also commonly shows birefringence, producing doubled images through clear pieces.

Field identification & locations

Identify by its softness, rhombohedral cleavage, glassy appearance, and acid reaction; common sources include Mexico, the United States, Brazil, and China. Avoid harsh cleaning and scratching.