Igneous rocks form from the cooling and crystallization of magma or lava. Igneous rocks can cool slowly underground or be shot hundreds of feet into the air. These rocks are classified based on their crystalline texture and chemical composition.
This kit contains 12 numbered specimens and a specimen key. Samples are numbered and stored in a sturdy, sectioned container for easy access and safe keeping.
Samples include: basalt, diorite, gabbro, granite, pegmatite, obsidian, peridotite, pumice, rhyolite, scoria, syenite, and tuff.
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