Related Clues:

• Hematite, pyrite, etc.
• Mine finds
• They're found in lodes
• Limonite and siderite
• Magnetite et al.
• Smelted materials
• Siderite and magnetite
• Suitably refined, they get into some golf clubs
• Magnetite and hematite
• Goethite and magnetite
• Hematite and magnetite, e.g
• Limonite and hematite, for two