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