Banded Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Category
Rock
Browse rock specimens identified by the Rock Identifier community.
Banded Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Sandstone
Arenite (SiO2 based)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Sandstone
Arenite
sedimentary
Artificial Rock Face (Faux Rock)
Glass Fiber Reinforced Concrete (GFRC)
man-made/construction material
Sandstone (Micaceous Sandstone)
Arenite (SiO2 with KAl2(AlSi3O10)(OH)2 inclusions)
sedimentary
Sedimentary rock with quartz veining
Laminated siltstone or mudstone with hydrothermal quartz veins
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Basalt with Hematite staining
Extrusive mafic igneous rock with Fe2O3
igneous
Basalt
Extrusive mafic igneous rock
igneous
Basalt
Extrusive mafic igneous rock
igneous
Granodiorite
Granodiorite (Intermediate plutonic rock)
igneous
Quartzite River Rock
Quartzite (primarily SiO2)
metamorphic
Scoria (Lava Rock)
Scoria
igneous
Quartzite with inclusions
Metamorphic Rock (Mainly SiO2)
metamorphic
Basalt (tumbled/water-worn)
Extrusive mafic igneous rock
igneous
Basalt
Extrusive Mafic Igneous Rock
igneous
Basalt
Extrusive mafic igneous rock
igneous
Basalt with Iron Oxidation
Amygdaloidal Basalt (silicate rock primarily plagioclase, pyroxene, and olivine)
igneous
Vesicular Basalt
Extrusive Basalt (Mafic Silicate)
igneous
Garnetiferous Pegmatite
Pegmatite with Almandine Garnet and Muscovite
igneous
Quartzite
Quartzite (SiO2)
metamorphic
Red Sandstone
Arenite (with Iron Oxide)
sedimentary
Granodiorite
Granodiorite (Intermediate intrusive igneous rock)
igneous
Granular Sandstone
Arenite (variable composition, primarily SiO2)
sedimentary
Thunderegg (Agate-filled Geode Node)
Silicon dioxide (SiO2) with various inclusions
sedimentary/igneous association
Granite
Granite (composed mainly of Quartz, Feldspar, and Mica)
igneous
Fossiliferous Limestone
Biogenic Limestone (Calcium Carbonate, CaCO3)
sedimentary
Red Sandstone
Arenite
sedimentary
Quartz Veinated Sandstone or Siltstone
Silicon Dioxide (SiO2) within a clastic sedimentary matrix
sedimentary
Basalt
Basalt (Mafic igneous rock)
igneous
Banded River Cobble with Mafic Dike
Hydrothermally altered Graywacke or Sandstone with Mafic Intrusion
igneous and sedimentary
Blue Dyed Agate Geode
Chalcedony (cryptocrystalline Quartz), SiO2
mineral
Septarian Nodule
Septarian Concretion (CaCO3 with Siderite/Limonite streaks)
sedimentary
Milky Quartz Pebble (Iron-Stained)
Silicon Dioxide (SiO2)
mineral
Sandstone (Quartzite Pebble)
Arenite (primarily SiO2)
sedimentary
Milky Quartz with Mineral Inclusions
Silicon Dioxide (SiO2) with miscellaneous inclusions
mineral
Quartz / Quartzite
Silicon Dioxide (SiO2)
mineral / metamorphic
Quartz (Chert/Chalcedony variety)
Silicon Dioxide (SiO2)
mineral
White Quartz
Silicon Dioxide (SiO2)
mineral