Sandstone (Ferruginous)
Clastic Sedimentary Rock (SiO2 with Fe2O3/FeOOH cement)
sedimentary
Category
Not A Rock (Man Made Origin)
Browse not a rock (man made origin) specimens identified by the Rock Identifier community.
Limestone (with Iron-Oxide staining)
Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Sandstone (likely Quartzose Sandstone)
Arenite (composed primarily of SiO2)
sedimentary
Sandstone (Quartz Arenite)
Sandstone (Chemical formula: primarily SiO2)
sedimentary
Olivine (Peridotite)
(Mg, Fe)2SiO4 (Magnesium Iron Silicate)
igneous
Porphyritic Rhyolite
Rhyolite (Porphyritic texture)
igneous
White Quartz Pebble (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Basalt
Basalt (Mafic volcanic rock)
igneous
Granite
Granite (Felsic Plutonic Rock)
igneous
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Basalt
Basalt (Igneous Volcanic Rock)
igneous
Basalt
Extrusive Mafic Igneous Rock
igneous
Basalt
Basalt (Mafic volcanic rock)
igneous
Sandstone (Ferruginous)
Arenite (primarily SiO2 with Fe2O3 staining)
sedimentary
Gold-Bearing Quartz
Silicon Dioxide with Native Gold (SiO2 + Au)
mineral
Scoria (Volcanic Rock)
Scoria (often basaltic scoria)
Igneous
Quartzite
Quartzite (SiO2)
metamorphic
Pumice (Volcanic Rock)
Vesicular volcanic rock (composed largely of amorphous volcanic glass)
igneous
Quartzite
Quartzite (SiO2)
metamorphic
Granite
Granite (Phaneritic Quartz-Feldspar Felsic Rock)
igneous
Sandstone
Arenite (primarily SiO2)
sedimentary
Moonstone (in a halo ring setting)
Orthoclase Feldspar (containing alternating layers of Albite), (KAlSi3O8)
mineral
Quartz (Milky or Druzy Quartz)
Silicon Dioxide (SiO2)
mineral
Granite
Phaneritic plutonic felsic rock
igneous
Basalt
Extrusive mafic igneous rock
igneous
Basalt
Extrusive mafic igneous rock
igneous
Granite
Phaneritic Plutonic Felsic Rock
igneous
Basalt
Extrusive mafic igneous rock
igneous
Scoria (Lava Rock)
Scoria (Mafic Volcanic Rock)
igneous
Scoria (Lava Rock)
Scoria (Vesicular Basaltic Rock)
Igneous
Scoria (Lava Rock)
Mafic Vesicular Volcanic Rock
igneous
Lava Rock (Basalt)
Basalt (extrusive igneous rock)
igneous
Scoria (Lava Rock)
Scoria (vesicular basaltic rock)
igneous
Diorite
Diorite (an intrusive igneous rock)
igneous
Basalt
Extrusive mafic igneous rock
igneous
Granite
Granite (Felsic Plutonic Rock)
igneous
Basalt
Extrusive mafic igneous rock
igneous
Basalt
Extrusive mafic igneous rock
igneous
Basalt (River Stone)
Aphanitic Mafic Igneous Rock
igneous
Sandstone (with potential iron-oxide weathering)
Arenite (SiO2 based)
sedimentary
Sandstone (Weathered)
Arenite (primarily SiO2)
sedimentary
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary