Igneous rocks are one of the three major rock types. They are basically made of magma. Igneous rocks are often called fire rocks. This is because the word "igneous" comes from a Latin word for, "of fire." Igneous rocks are the oldest type of rocks. All types of rocks begin as an igneous rock. Often igneous rocks are formed different ways. Therefore, they are classified in different groups

http://g7earthmaterials.wikispaces.com/Igneous+Rocks 

 ROCK INDEX:

http://www.bgsd.k12.wa.us/hml/jr_cam/science/rocks/igneous.htm 

FOR SMALLER PIECES:

http://www.ukge.co.uk/UK/prodtype.asp?PT_ID=411

 http://www.ukge.co.uk/UK/looserocks.asp?PT_ID=226

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