Mohs' Hardness Scale

In the early 19th century, German mineralogist Friedrich Mohs developed a practical method for comparing the hardness of minerals. How many of the ten minerals in Mohs' scale can you name in 5 minutes?

1 of 1
Mohs' Hardness Scale
Talc
Gypsum
Calcite
Fluorite|Fluorspar
Apatite
Feldspar|Orthoclase
Quartz
Topaz
Corundum
Diamond