Image Gallery: Igneous rocks

Igneous rocks are formed when magma cools and solidifies. They are classified by using grain size, silica content, and/or silica saturation. View some examples of igneous rocks from the Australian Museum's Mineralogy Collection.

Aa lava Aa lava
Amygdaloidal basalt Amygdaloidal basalt
Andesite Andesite
Basalt Basalt
Basaltic scoria Basaltic scoria
Dacite Dacite
Flow-banded rhyolite Flow-banded rhyolite
Kimberlite Kimberlite
Komatiite (fresh surface) Komatiite (fresh surface)
Komatiite (weathered surface) Komatiite (weathered surface)
Obsidian Obsidian
Olivine lamproite Olivine lamproite
Pahoehoe lava Pahoehoe lava
Perlite Perlite
Porphyritic trachyte Porphyritic trachyte
Pumice Pumice
Tuff Tuff