When the minerals regrow, this is called without foliation. Examples of rocks that are with foliation are Slate, Schist, and Gneiss. Examples of rocks that are without foliation are Marble and Quartzite. Some of the metamorphic rocks are absolutely gorgeous to look at. Minerals are naturally occurring, inorganic substances that have a definite chemical composition, structure, color, and hardness.
Minerals are the building blocks for rocks and soils.
Since minerals have a definite chemical composition, structure, color, and hardness, they can be identified by their physical properties. To figure out the hardness of a mineral, the Moh's scale of hardness is used. This scale was developed by Fredrich Mohs, a German scientist, about 200 years ago. This scale is also used to test the hardness of rocks too. A copy of the hardness scale is attached to the lesson plan.