





Set of 15 igneous rocks. Samples are approximately 1-1/2 to 2 inch chunks. Igneous rocks are formed from the a molten state. Igneous rocks have cooled and crystallized deep beneath the surface of the earth, or have reached the surface through cracks and fissures. You'll receive the following: Biotite Granite (biotite, feldspar, quartz), Granite (feldspar, quartz), Syenite, Diorite, Gabbro, Anorthosite, Hornblende Basalt Porphphry, Trachyte Porphyry, Felsite, Andesite, Basalt, Obsidian, Pitchstone, Pumice, Scoria. Lovely set for any collector or practitioner. Includes 15 igneous rocks, and description sheet in display box.
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