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Franklinite, zinc oreA granular rock composed of white calcite, dull green willemite, red zincite and black franklinite (Zinc Iron Manganese Oxide). See T00387 for a fluorescent view
Franklinite, fluorescingOre of zinc fluorescing under ultra violet radiation: calcite - pink; willemite - green; zincite - blue; franklinite - black. See image number 388 for white light view
