Granite
Granite (Felsic Plutonic Rock)
igneous
Category
Anthropogenic Material (Man Made Rock)
Browse anthropogenic material (man made rock) specimens identified by the Rock Identifier community.
Basalt
Basalt (Mafic volcanic rock)
igneous
Sandstone (Ferruginous)
Arenite (Fe2O3 rich)
sedimentary
Sandstone (Ferruginous)
Arenite (Fe-rich)
sedimentary
River Rock / Stream Pebble
Fluvial Clast / Rounded Sedimentary Particle
Sedimentary Rock (possibly composed of various minerals)
Limestone (River Stone)
Calcium Carbonate (CaCO3)
sedimentary
Chert (Common Opal variant)
Microcrystalline Quartz (SiO2)
sedimentary
Basalt
Basalt (primarily Pyroxene and Plagioclase)
igneous
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Conglomerate
Conglomerate
sedimentary
Limestone with Calcite
Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Sandstone (likely Graywacke or Arkose variant)
Clastic Sedimentary Rock (SiO2 with assorted lithic fragments)
sedimentary
Sandstone (likely Quartzite-rich)
Arenite (primarily SiO2)
sedimentary
Biotite Schist (likely)
Biotite Schist (rock), Biotite (mineral)
Metamorphic
Sandstone (Quartzose Sandstone)
Clastic Sedimentary Rock - Arenite
sedimentary
Red Sandstone (Arkose)
Clastic Sedimentary Rock (Lithic Arkose)
sedimentary
Scoria (Lava Rock)
Vesicular Basalt / Scoria
igneous
Sandstone (Ferruginous)
Arenite (primarily SiO2 with Fe2O3 staining)
sedimentary
Sandstone (likely Graywacke or Arkose variant)
Clastic Sedimentary Rock (Lithic Sandstone)
sedimentary
Sandstone
Arenite
sedimentary
Basalt
Basalt (Mafic volcanic rock)
igneous
Sandstone
Arenite (primarily SiO2)
sedimentary
Quartzite
Quartzite (composed primarily of SiO2)
metamorphic
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Flowerstone
Porphyritic Basalt or Porphyritic Andesite
igneous
Sandstone (likely Ferruginous)
Arenite (SiO2 with iron oxide impurities)
sedimentary
Sandstone (Red/Brown Variety)
Arenite (SiO2 with iron oxide impurities)
sedimentary
Sandstone (Ferruginous)
Sandstone (primarily SiO2 with Iron Oxide cement)
sedimentary
Limestone
Calcareous sedimentary rock (CaCO3)
sedimentary
Quartzite Pebble
Quartzite (SiO2)
metamorphic
Quartzite Pebble
Quartzite (SiO2 with minor impurities)
metamorphic
Red Sandstone
Arenite (primarily Quartz with Hematite cement)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Diabase
Diabase (also known as Dolerite)
igneous
Sandstone
Arenite (clastic sedimentary rock)
sedimentary
Quartzite
Quartzite (primarily SiO2)
metamorphic
Ferruginous Siltstone or Mudstone
Ferruginous Siltstone / Goethitic Sandstone
sedimentary
Sandstone
Arenite
sedimentary
Travertine (Tufa)
Chemical Sedimentary Limestone (CaCO3)
sedimentary
Sandstone
Sandstone (clastic sedimentary rock, predominantly SiO2)
sedimentary