Fluorite forms in veins and cavities where warm, mineral rich fluids move through limestone and granite, often alongside quartz, calcite, and metallic ores. As those fluids cool, calcium and fluorine lock into perfect cubes and octahedrons, and trace elements and natural radiation paint the ribbons of purple, green, blue, and yellow that make each piece its own. It was named by the German scholar Georgius Agricola in 1530 from the Latin fluere, to flow, because miners used it to help metal ores melt and flow during smelting.

Fluorite is calcium fluoride, chemical formula CaF2, a halide mineral that crystallizes in the cubic system as cubes, octahedrons, and interpenetrating twins. It has a Mohs hardness of 4, a vitreous luster, and ranges from transparent to translucent in nearly every color. Many specimens glow under ultraviolet light, and the term fluorescence was named after fluorite in 1852 after this very behavior was studied in it.

Ancient Romans carved fluorite into murrine drinking vessels and believed wine drunk from them would not intoxicate the drinker., In China, fluorite was carved into figurines and snuff bottles for centuries and was regarded as a stone that guarded the mind and kept evil spirits from disturbing dreams., and The banded blue and purple Blue John fluorite of Derbyshire, England was prized from Roman times, set into vases and ornaments thought to protect and steady the one who owned them.

My mind is clear and my thoughts are my own. I set down the noise I have carried, sort what matters from what does not, and meet each decision with steady, impartial focus. I am protected, grounded, and free to see things as they truly are.