*need to confirm locality

La Viesca Mine, in the Huergo–La Collada mining area of Siero, Asturias, Spain, has produced fluorite crystals ranging from colorless to deep violet, often displaying sharp cubic forms or with dodecahedral modifications. Specimens frequently occur as gemmy, well-formed cubes perched on sparkling quartz or calcite, creating striking contrast and aesthetic appeal. Collectors prize La Viesca fluorites for their broad color spectrum, transparent zoning, and occasional phantom growths, making them some of Spain’s most iconic fluorite specimens.