Fluorite: The Genius Stone in Every Color

Fluorite has a claim to fame most minerals don't: it's the reason we have the word "fluorescence." In the 1800s, scientists studying how fluorite glowed under ultraviolet light coined the term directly from the mineral's name — fluorite was that good at demonstrating the effect.

Chemically, fluorite is calcium fluoride (CaF₂), crystallizing in the cubic system with perfect octahedral cleavage — which is why broken fluorite pieces often show natural, diamond-like facets. It's famous for occurring in an enormous range of colors: purple, green, blue, yellow, and colorless, often banded together in the same crystal, sometimes called "rainbow fluorite" when multiple colors appear in a single tumbled piece. At a Mohs hardness of just 4, it's soft enough to require gentle handling, which is part of why it's more often a display and collector stone than an everyday jewelry stone.

Our fluorite specimens come primarily from the El Hamman mine in Morocco, where fluorite frequently grows alongside calcite and pyrite — producing striking combination specimens where the cubic purple fluorite crystals sit against white calcite and metallic gold pyrite in the same piece. We also carry rainbow fluorite tumbled stones and fluorite beads for jewelry making.

In metaphysical traditions, fluorite is sometimes called the "genius stone," associated with mental clarity, focus, and organizing complex thoughts. Browse our fluorite specimens and combination pieces to see the color range for yourself.