Solutions Softest of minerals has 6 entries with similar clues
- oreValuable deposit of minerals in a rock formation
- slagWaste rocks and minerals from a coal mine
- prospectExplore an area for gold or other minerals
- inorganic...... chemistry, study of minerals
- mohs-scaleScale of hardness of minerals based on resistance to scratching
- bath-saltsMinerals used in bathing water