Purple chevrons in fluorite aren’t patterns painted on later, they’re growth history. Each band marks a shift in chemistry as the crystal formed, layering clear to deep violet over time. Under certain light, the purple deepens even more thanks to trace elements and natural radiation effects. Fluorite often gets mistaken for Charoite, but they form in completely different ways. Fluorite grows as a cubic mineral from hydrothermal fluids and shows clean zoning or geometric banding. Charoite is a ra