Get acquainted with one of the most interesting products of geological processes with this introductory collection of real specimens of igneous rock. Igneous rocks are formed by the cooling of molten rock, either magma or lava and are thus often direct results of volcanic activity; examples include obsidian, pumice, and basalt. The Igneous Rock Bag is an economy collection of 6 specimens representative of igneous rock family.  Each generous specimen is 1.25" to 1.5" and is contained in a zip lock bag with a label.

Features:

• Collection of 6 real specimens of igneous rock
• Each rock is formed by volcanic activity and the cooling of superhot liquds such as magma
• Each specimen is labeled and measures 1.25" to 1.5"
• Includes a small bag for carrying your rocks
• Bag contains 6 rocks representative of the igneous classification - each bag's contents may differ