Mohs Hardness Scale Hardness Index Mineral Useful Comparison 1 Talc Candle Wax (1) 2 Gypsum Fingernail (2.5) 3 Calcite Penny (3) 4 Fluorite 5 Apatite Glass (5.5) 6 Orthoclase 7 Quartz Unglazed Tile (7) 8 Topaz 9 Corundum 10 Diamond Luster refers to what the surface looks like.
(Diamond Luster; refers; to what the surface looks like) (the surface; looks; )
Diamond Luster the surface
refers looks
to what the surface looks like