How to learn the different types of rock?

Question

I would like to be able to point to a piece of rock and say that is rock type *such and such*. I have tried learning but it literally seems like an endless list of types and sub types and the pictures don’t really seem to help me. Short of a person taking me out and physically handing me rock specimens, is there any easy way to self learn the different types?

Answer 1

You basically need to learn the three primary classes, how they are formed and the general appearances as a result of the formation processes. The lists of rock types for each primary class further subdivide the class based upon chemistry, physical formation conditions, etc. and will further define the rock's appearances. You need to take an introductory geology class that has an associated laboratory session in which you will study the physical appearances and distinguishing characteristics of each rock type. A visit to a good museum with a clearly visible variety of rock specimens identified can also help. Once you put in the effort to study in this manner field trips in which you are introduced to rocks in their natural settings will help.