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Element named for a mythical Greek weeper
Else clues• Element in stainless steel
• Element named for a mythical Greek weeper
• Element named for a mythical queen
• Its principal ore is columbite
• Steel-gray Element
• Element in stainless steel
• Element named for a mythical queen
• Its principal ore is columbite
• Steel-gray Element
• A soft gray ductile metallic element used in alloys
• Occurs in niobite
• Formerly called columbium