mineral

Fluorite

Calcium Fluoride (CaF2)

Mohs hardness of 4, vitreous luster, cubic crystal system, and perfect octahedral cleavage with variable colors including green, purple, and yellow.

Identified October 18, 2026More mineral →

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Physical properties

Mohs hardness of 4, vitreous luster, cubic crystal system, and perfect octahedral cleavage with variable colors including green, purple, and yellow.

Formed in hydrothermal veins and sedimentary rock cavities through the precipitation of fluorine-rich mineral solutions over millions of years.

Widely used in metallurgy as a flux, in the manufacture of optical lenses, and as a popular ornamental gemstone for collectors.

Fluorite exhibits strong fluorescence under ultraviolet light, a phenomenon that derives its name from this mineral.

Easily identified by its characteristic octahedral cleavage, cubic crystals, and relatively low hardness of 4.

Gneiss or Schist

Gneiss or Mica Schist with Garnet

Sandstone (with potential mineral staining/concretions)

Arenite (SiO2 based)

Tumbled granite

Granite, a coarse-grained felsic intrusive igneous rock

Pegmatite with Tourmaline and Quartz

Igneous Pegmatite

Epidote

Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)

Granite

Granite (Phaneritic intrusive igneous rock)