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fluorite - most colorful mineral

4-strand torsade of apatite & pearls with fluorite pendant

compositioncalcium fluoride
name sourcefrom the Latin fluere, meaning "to flow," referring to its being used as flux in the smelting of metallic ores
other accepted namesfluorine, fluorospar (popular in the mining community), "Blue John" or "Derbyshire spar"
historical aliases"the most colorful mineral in the world," green quartz (misleading), myrrhina (Roman)
folkloric aliases"the genius stone"
color many colors but 'hallmark' color is purple
significant sourcesChina, England, Mexico and many other localities throughout the world
MOH scale4
care and treatmentClean with warm soapy water and a soft brush. Fluorite's low hardness means it scratches easily. Store away from any objects that might scratch it.