Basalt Pebble
Mafic Extrusive Igneous Rock
igneous
Category
Man Made Rock (Technosol)
Browse man made rock (technosol) specimens identified by the Rock Identifier community.
Learn about Man Made Rock (Technosol) in the encyclopedia
View all →
Basalt Pebble
Extrusive Igneous Rock
igneous
Sandstone
Arenite (primarily Quartz and Feldspar)
sedimentary
Granite
Granite (felsic intrusive igneous rock)
igneous
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Granite
Phaneritic Felsic Igneous Rock
igneous
Chalcedony (Blue Dragon/Gray Chalcedony)
Silicon Dioxide (SiO₂)
mineral
Chert (or potentially Jasper/Chalcedony)
SiO2 (Silicon Dioxide)
sedimentary
Serpentine
Antigorite, Lizardite, or Chrysotile (Mg, Fe)3Si2O5(OH)4
metamorphic
N/A (Non-Geological Specimen)
N/A
Schist
Schist
Metamorphic
Unable to identify - Image contains non-geological items
N/A
Sandstone or Weathered Conglomerate
Sedimentary Rock (Quartzose Sandstone / Lithic Arenite)
sedimentary
Granite Pebble
Granite
igneous
Sandstone (Ferruginous)
Arenite (primarily SiO2 with iron oxide cement)
sedimentary
Sandstone (River Rock)
Arenite (composed primarily of SiO2)
sedimentary
River Stone (Quartzite/Chert mixture)
Microcrystalline Quartz (SiO2)
sedimentary
Fossil Coral
Rugose Coral / Hexagonaria (CaCO3)
fossil
Asphalt (Bituminous Pavement Bit)
Bitumen-bound aggregate (Petrochemical-bound composite)
sedimentary (anthropogenic/technogenic)
Sandstone with Manganese Dendrites
Clastic Sedimentary Rock (SiO2 based with MnO2 inclusions)
sedimentary
Limestone with Lichen/Moss
Calcium Carbonate (CaCO3)
sedimentary
Sandstone (Ferruginous)
Arenite (primarily SiO2 with iron oxide cement)
sedimentary
Rock Salt
Halite (NaCl)
mineral
River Rock
Polished Siliceous Rock / Quartzite Pebble
sedimentary
River Rock
Mixed composition, often quartzite, sandstone, or basalt
sedimentary
River Rock
Polished Quartzite / Silicified Sedimentary Rock
sedimentary
Conglomerate
Conglomerate (a clastic sedimentary rock)
Sedimentary Rock
Basaltic Tuff / Volcanic Breccia
Pyroclastic Breccia / Lithic Tuff
igneous
Basalt
Extrusive mafic igneous rock
igneous
Basalt
Extrusive Igneous Rock
igneous
Basalt
Extrusive Igneous Rock
igneous
Banded Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Gneiss (with Mica and Quartz)
Gneissic Metamorphic Rock
metamorphic
Scoria
Vesicular Basaltic Rock
igneous
Sandstone
Arenite (Sedimentary Rock)
sedimentary
Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartz Rock
Silicon Dioxide (SiO2)
mineral
Sandstone and Gravel Aggregate
Clastic Sedimentary Rock / Quartzose Sandstone
sedimentary
Biotite Schist
Biotite Schist
Metamorphic
Chert Breccia
Brecciated Chert
sedimentary
Jasper Pendant
Chalcedony (Quartz) - SiO2
Mineral/Sedimentary
Limestone Riprap
Sedimentary Calcium Carbonate (CaCO3)
sedimentary