Science Can you order these rocks, softest to hardest please? Chalk, limestone, clay, sandstone, slate. Asked by arwen46 13 years ago 1/22/2013 1:47 AM Last updated by anonymous 13 years ago 1/23/2013 9:36 PM
chalk 3,limestone 3-4, slate 3-4, sandstone 6.5-7 moh scale of hardness for minerals 1. talc 2. gympsum 3. calcite 4. fluorite 5. apatite 6. feldspar 7. quartz 8. topaz 9. corundum 10. diamond
