Igneous rock

Peridotite and dunite

Ultramafic, intrusive and coarse-grained.

Equivalent: Komatiite is its volcanic equivalent.

**Peridotite (dunite) hand sample.** Wikimedia Commons (author and license on the file page). Source

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More photos and thin sections

Alex Strekeisen: Peridotites · Alex Strekeisen: Dunite

Other igneous rocks

Granite · Diorite · Gabbro · Rhyolite · Andesite · Basalt · Komatiite · Obsidian, pumice and scoria

Sources

Panchuk, Physical Geology 7.3: Classification of Igneous Rocks