mineral

Polished pink-orange calcite

Calcite (CaCO₃), likely honey or orange calcite

AI-generated identification · may be incorrect

Mohs hardness 3; translucent pale peach to honey color, vitreous to pearly luster, trigonal crystal structure, and perfect rhombohedral cleavage. The rounded, polished form and internal cloudy bands are consistent with calcite, though aragonite or satin spar gypsum are possible without testing.

Identified September 11, 2026More mineral →

Explore Polished pink-orange calcite in the encyclopedia →

Identify your own rocks.

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

App Store Google Play

Physical properties

Formation & geological history

Forms commonly in sedimentary limestone, hydrothermal veins, and cave deposits through precipitation from calcium-rich fluids; specimens may range from ancient sedimentary material to recent vein growth. The pictured piece is human-polished and shaped.

Uses & applications

Used for cement, lime, construction aggregate, neutralizing acidic soils, and optical calcite; attractive polished pieces are sold for décor and mineral collecting. It is generally too soft for durable jewelry.

Geological facts

Calcite effervesces visibly in dilute hydrochloric acid; this reaction distinguishes it from quartz and most feldspar. Double refraction can be observed by placing it over printed text, especially in clear areas.

Field identification & locations

Look for softness, rhombohedral cleavage, and acid fizz; a steel knife can scratch it, while quartz cannot. Common sources include Mexico, Brazil, Morocco, Iceland, and the United States.