Scoria (Lava Rock)
Vesicular Basalt / Scoria
igneous
Category
Rock
Browse rock specimens identified by the Rock Identifier community.
Chalcedony (Agate/Carnelian)
Silicon Dioxide (SiO2)
mineral
Hag Stone (Odin Stone / Adder Stone)
Perforated Pebble (commonly Chert, Mudstone, or Limestone)
sedimentary
Greywacke (Stream Pebble with Quartz/Calcite Veins)
Greywacke sandstone / Metagraywacke
sedimentary
Gold Ore
Native Gold (Au) in Quartz or Silicate matrix
mineral
Granite or Granitic Gneiss River Rock
Granite / Gneiss
Igneous or Metamorphic
Rough Emerald in Matrix
Beryl (Be3Al2Si6O18) with trace Chromium/Vanadium
mineral
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Limestone
Calcite (CaCO3)
sedimentary
Limestone (Fossiliferous)
Calcium Carbonate (CaCO3) - Bioclastic Limestone
sedimentary
Geode (Unopened)
Silica-rich Concretion (SiO2)
sedimentary
Banded Quartz with Host Rock / Quartz Vein Pebble
Silicon Dioxide (SiO2) in Metamorphic Matrix
metamorphic
Obsidian
Volcanic Glass
igneous
Obsidian
Volcanic Glass
igneous
Obsidian
Volcanic Glass (Amorphous Silicon Dioxide)
igneous
Calcite on Matrix
Calcium Carbonate (CaCO3)
mineral
Tiger's Eye
Silicon Dioxide with Crocidolite (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Ruby in Zoisite
Anyolite (Calcium Aluminum Silicate with Aluminum Oxide impurities)
metamorphic
Basalt (Vesicular or Scoriaceous)
Aphanitic Mafic Volcanic Rock
igneous
Sandstone
Arenite
sedimentary
Conglomerate
Conglomerate (clastic sedimentary rock type)
sedimentary
Quartz in Basalt (Xenocryst)
Silicon Dioxide (SiO2) in Mafic Igneous Volcanic Rock
Igneous
Sandstone
Sedimentary Rock (Quartz arenite / Lithic sandstone)
sedimentary
Sandstone
Clastic sedimentary rock (Quartz arenite)
sedimentary
Sandstone (lithic/quartz variant)
Clastic sedimentary rock (SiO2 predominant)
sedimentary
Basalt Puddle Stone
Basalt (Mafic volcanic rock)
igneous
Basalt (River Pebble)
Extrusive mafic igneous rock
igneous
Basalt (River Stone)
Basalt (Aphanitic Mafic Igneous Rock)
igneous
Vesicular Basalt (or Scoria)
Vesicular Basalt
igneous
Granite River Rock
Phaneritic Felsic Igneous Rock (Granite)
igneous
Sandstone
Arenite (primarily Quartz-rich)
sedimentary
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Granite Cobble
Granite (Porphyritic/Coarse-grained)
igneous
Pink Granite
Phaneritic intrusive igneous rock (Granite)
igneous
Granite
Phaneritic Felsic Igneous Rock
igneous
Granite
Felsic Intrusive Igneous Rock
igneous
Asphalt (Bituminous Concrete)
Bituminous mix / Anthropogenic conglomerate
man-made composite (lithified equivalent of sedimentary)
Granite
Felsic intrusive igneous rock
igneous
Granite
Phaneritic Felsic Igneous Rock
igneous