mineral

Fluorescent Calcite

Calcite (CaCO3)

AI-generated identification · may be incorrect

Hardness: 3, Color: typically white or colorless under normal light, fluoresces red or pink under UV light, Luster: vitreous to pearly, Crystal structure: trigonal, Cleavage: perfect rhombohedral

Identified August 29, 2026More mineral →

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Physical properties

Hardness: 3, Color: typically white or colorless under normal light, fluoresces red or pink under UV light, Luster: vitreous to pearly, Crystal structure: trigonal, Cleavage: perfect rhombohedral

Formation & geological history

Forms in a wide variety of sedimentary, metamorphic, and igneous environments. Fluorescence is typically caused by trace impurities (activators) such as manganese or lead.

Uses & applications

Collected for its fluorescent properties. Calcite in general is used in construction, agriculture, and industry.

Geological facts

Calcite is one of the most common fluorescent minerals. The red fluorescence seen here under UV light is characteristic of calcite from certain localities, notably Franklin and Sterling Hill, New Jersey.

Field identification & locations

Identified by its distinctive red fluorescence under shortwave UV light. Common locations include Franklin, NJ and various limestone deposits worldwide. Test for effervescence with dilute acid.