Kenyte lava
Basalt bomb
Diorite intruded by microgranite
Hornblende-biotite granite
Quartz-feldspar porphyry
Banded gneiss
Marum volcano, Vanuatu
Obsidian lava
Aa lava, Pacaya, Guatemala
Obsidian-rich lava flow, Tenerife
Sample of basalt
Obsidian rock
West Mata underwater volcano
Volcanic rocks
Kambhorn reflected in lagoon, Iceland
Skjaldbreidur shield volcano, Iceland
Nyiragongo volcano, Congo
Volcanic eruption
Lava falls during Kilauea eruption, 1969
Sample of granite
Volcanic eruption, Reunion Island
Lava flow
Basaltic lava flow, New Mexico, USA
Eruption of Mount Batu Tara, August 2011
La Tarta volcanic outcrop, Tenerife
Volcanic lava delta
Lava fountain during Kilauea eruption, 1969
Lava fountain during Kilauea eruption, 1959
Lava flow, deep sea vent
Descloizite
Fossil fern trunk
Santiago crater lava lake, Masaya caldera, Nicaragua
New island formed by Hunga Tonga volcano, 2017
Smoke and light coming through crack in lava rock, elevated view
Eruption of Fuego volcano, November 2016
Erta Ale volcano, Congo
Sample of biotite
Pegmatite specimen
Tuff specimen
Biotite
Biotite, Tyringham, Massachusetts, USA
Rhyolite, Mexico
Banded rhyolite
Sample of sandstone
Sample of limestone
Fossil Sphenophyllum plant
Gymnosperm fossil
Fossil conifer leaf
Fossil leaf
Fossil fern frond
Fossil cycad leaves
Sanidine on trachyte lava groundmass
Blue Hauyne crystals in lava groundmass
Obsidian mineral stone
Fractured pillow lava, deep sea vent
Volcanic landscapes in Western Iceland.
Volcan de Fuego erupting at night, Guatemala
Basalt columns
Cutaway model of the Earth's core
Rhyolite
Trachyte
Aggregate of muscovite crystals
Tuff rock with graded bedding
Volcanic rock
Eruption of Momotombo volcano, February 2016
Lava tube tourist attraction, Hawaii
Volcanic crater
Tangaroan volcanic eruption, artwork
East Pacific Rise, topographic map
Fluorite
Tiger eye
Geothermal hot spring vents, Ethiopia
Storage of fossil specimens
Olivine mineral sample
Algae in geothermal pool
Algae in geothermal pool, New Zealand
Axinite
Sample of shale
Homo sapiens skull comparison
Fish fossils
Fossil torvosaurus dinosaur claw
Lapilli, lava droplets
Mount Etna erupting at night, 2012
Mount Etna erupting, 2012
Mount Bromo erupting, Indonesia, 2011
Azurite crystals
Carnelian agate
Cut and polished jasper
Quartz
Tourmaline
Pillow lava, deep sea vent
Lava flowing into ocean, Hawaii
Zoisite in pegmatite groundmass
Lava lake volcanic activity, Ethiopia
Lava lake volcanic fissures, Ethiopia
Sample of andesite
Summit crater of Hverfjall volcano, Iceland
Venus, synthetic aperture radar map
Mount Vesuvius erupting, 1944
Wake through a pumice raft, Tonga, 2006
Lava landscape
Amber
Vesicular basalt
Sample of muscovite
Obsidian, a glassy igneous rock
Rhyolite specimen
Obsidian
Variety of Igneous Rocks
Muscovite Mica, Ontario, Canada
Muscovite Mica
Lepidolite, Newry, Maine, USA
Pegmatite, New Hampshire, USA
Basalt, Massachusetts, USA
Scoria, Oregon, USA
Green Tourmaline in Muscovite, Maine
Muscovite Star Mica
Brazilianite crystals in calcite