Igneous rock
Komatiite
Ultramafic, extrusive and fine-grained.
Equivalent: Peridotite is its intrusive equivalent.
More photos and thin sections
Other igneous rocks
Granite · Diorite · Gabbro · Peridotite and dunite · Rhyolite · Andesite · Basalt · Obsidian, pumice and scoria
Sources
Panchuk, Physical Geology 7.3: Classification of Igneous Rocks