The Mohs&#39; scale ranks minerals as follows, from softest to hardest: (1) talc, (2) gypsum, (3) calcite, (4) fluorite, (5) apatite, (6) orthoclase, (7) quartz, (8) topaz, (9) corundum, (10) diamond.
(scale; ranks talc; minerals)
scale
ranks talc
minerals