You may not realize it, but there's more to rocks than meets
the eye. All rocks are not the same and, in this business,
it is important to understand the differences between them.
So, let's talk about the science behind the rocks under your
What is geology? Geology is the study of the earth's history,
the materials that make the earth and how these materials
change over time. There are hundreds of kinds of rocks covering
the earth. These rocks are divided into three classes.