Igneous obsidian - Printable Version

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Igneous obsidian - Pulkitm - 08-19-2014

Igneous obsidian

Obsidian rocks are igneous rocks that form when lava cools quickly above ground. Obsidian is actually glass and not a mixture of minerals. The edges of this rock are very sharp. Example are Feldspar, quartz and mica.

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