Igneous

Igneous rocks form when molten rock (magma or lava) cools and solidifies. They are classified as either intrusive (plutonic) or extrusive (volcanic) depending on where they formed.

4 specimens starting with "G" (of 34 total)

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All A B C DEF G HIJK L MNOPQR S TUVWXYZ0-9

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Gabbro

Hardness: 6

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Galaxyite

Hardness: 6 - 6.5

Granodiorite

Hardness: 6

Greisen

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