Igneous rock texture:

1) How does cooling rate affect the texture and crystal size of igneous rocks? Give some examples

2) How does the rock composition affect  (What it is made of) affect crystal size of igneous rocks? Give some examples

3) Explain how the mohs scale is used with rocks. Give examples of rocks at different ends of the continuum.

4) Explain what cleavage is in relation to rocks. Give some examples of this.

5) Find out more about a precious stone. How it is formed, carats, where it is found, it's value etc.