Mohs Scale

Absolute Hardness Mohs Scale Mineral
1 1 Talc
3 2 Gypsum
9 3 Calcite
21 4 Fluorite
48 5 Apatite
72 6 Orthoclase
100 7 Quartz
200 8 Topaz
400 9 Corundum
1600 10 Diamond
This standard scale of mineral hardness was devised in 1822 by Freidrich Mohs. It uses common minerals and objects as benchmarks. These benchmarks do not follow a linear progression of increasing hardness.

Graphing Exercise

Using the table data, plot the Mohs scale hardness (x-axis) versus the absolute hardness (y-axis). Be sure to label the axes and provide a title.

20 x 20 square graph