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Igneous

ig·​ne·​ous | ˈig-nē-əs

adjective

A rock formed by solidification of magma or lava

Igneous rock may form with crystallization to form granular, crystalline rocks, or without crystallization to form natural glasses. Some gemstones found in igneous rock include beryl, diamond, garnet, peridot, quartz, spinel, topaz, tourmaline, and zircon.

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