mineral

Orange calcite

Calcite, CaCO₃

AI-generated identification · may be incorrect

Hardness 3 Mohs; translucent orange to honey-brown, vitreous to pearly luster, trigonal crystal system, and prominent rhombohedral cleavage. The specimen appears to show calcite’s characteristic flat cleavage faces.

Identified October 10, 2026More mineral →

Explore 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 in sedimentary and hydrothermal settings, including limestone cavities and mineral veins; calcite occurs in rocks of many geological ages. Orange color commonly comes from trace impurities or inclusions.

Uses & applications

Used in cement and lime production, construction, and as a decorative or collecting mineral; attractive pieces may be polished or used in jewelry, though its softness limits wearability.

Geological facts

Calcite reacts readily with dilute acid, fizzing as it releases carbon dioxide; its strong birefringence can make text viewed through a clear crystal appear doubled.

Field identification & locations

Common worldwide, including limestone regions and hydrothermal veins. Check for hardness near 3, rhombohedral cleavage, and acid reaction; the image is consistent with orange calcite, but confirmation requires testing.