____ Moh s Scale of Hardness 1-Talc 6-Orthoclase 2-Gypsum 7-Quartz 3-Calcite 8-Topaz 4-Flourite 9-Corundum 5-Apatite 10-Diamond ____ The hardness of an unkown mineral is found by scratching its edge against the surface of each reference mineral.
(The hardness of an unkown mineral; is found; ) (The hardness of an unkown mineral; by scratching; its edge)
The hardness of an unkown mineral The hardness of an unkown mineral
is found by scratching
its edge