Sandstone
Arenite or Sandstone
Category
Browse synthetic (man made material mimicking natural stone) specimens identified by the Rock Identifier community.
Sandstone
Arenite or Sandstone
Serpentine
Serpentine group ((Mg, Fe, Ni, Al, Zn, Mn)3(Si, Al, Fe)2O5(OH)4)
Yellow Quartz (Citrine/Lemon Quartz)
Silicon Dioxide (SiO2)
Jasper-Agate Breccia
Silicon Dioxide (SiO2) with iron oxide inclusions
Lepidolite
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2 (Lepidolite - Lithium-rich Mica)
Banded Chert (Agate-like Flint)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Petrified Wood
Silicified Wood (SiO2)
Sandstone
Arenite (primarily SiO2)
Red Sandstone
Clastic sedimentary rock (primarily SiO2 with Fe2O3)
Quartzite (River Pebble)
Metamorphic Quartz (SiO2)
Sandstone (Ferruginous)
Arenite (Fe-rich)
Sandstone
Arenite (primarily Quartz SiO2)
Red Sandstone
Clastic Terrigenous Sedimentary Rock (primarily SiO2 with Fe2O3 coating)
Red Sandstone
Arenite (with Iron Oxide / Hematite), Formula: SiO2 (Quartz) + Fe2O3 (Hematite coating)
Sandstone
Arenite
Quartzite
Quartzite (SiO2)
Red Sandstone
Arenite (predominantly SiO2 with Fe2O3)
Sandstone (Weathered Pebble)
Arenite (primarily SiO2)
Sandstone (Quartzite-rich)
Clastic sedimentary rock (SiO2 primary)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Sandstone
Arenite (composed primarily of SiO2)
Sandstone
Arenite (composed primarily of SiO2)
Chert (concretionary/nodular variant)
Microcrystalline Quartz (SiO2) with possible fossil or mineral inclusions
Sandstone (Ferruginous)
Arenite with Iron-Oxide Cement
Sandstone
Arenite (primarily SiO2 with various cementing agents)
Quartzite Cobble
Quartzite (SiO2)
Quartzite
Quartzite (SiO2)
Quartzite River Rock
Quartzite (primarily SiO2)
Granite
Granite (Felsic Plutonic Rock)
Chert
Chert (Microcrystalline Silica, SiO2)
Basalt (Vesicular)
Extrusive mafic igneous rock; primarily (Mg, Fe)2SiO4 (Olivine), CaAl2Si2O8 (Plagioclase Feldspar), and Pyroxene
Fluorite (Rainbow, Purple-Blue Tumbled)
Calcium Fluoride (CaF2)
Petrified Wood (Agatized/Silicified Wood)
Silicified Wood (SiO2)
Moss Agate / Chalcedony
Silicon Dioxide (SiO2)
Chert (Nodular Chert)
Microcrystalline or Cryptocrystalline Silicon Dioxide (SiO2)
Red Jasper (River Siltstone)
Silicon Dioxide (SiO2) with iron oxide inclusions
Coquina / Fossiliferous Limestone
Fossiliferous Calcarenite (Calcium carbonate, CaCO3)
Chert (often called Flint when dark)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Diamond
Diamond (Pure Carbon, C)
Basalt
Basalt (Aphanitic Mafic Igneous Rock)
Banded Sandstone
Arenite (composed primarily of Quartz: SiO2)
Red Sandstone
Arenite (primarily Quartz SiO2 with Hematite Fe2O3 cement)