Sort by Hardness Hardness, which is the resistance of a mineral to scratches, is measured on a scale known as Mohs Scale . The Mohs scale ranges from 1 - 10. Minerals under this selection method will be grouped based on their hardness. There are seven crystal systems that minerals belong to. In this display method, minerals are displayed by the crystal system they belong to.
Many minerals are famous for their elemental structure due to an important element or compound.
With this sorting method, you can select a particular element and see all the minerals that contain that element in their structure. This method is a strictly scientific sort method based on the classification numbers given to minerals by the latest edition of Dana's New Mineralogy.