Sandstone
Arenite (composed primarily of SiO2)
Category
Browse man made rock (sedimentary analogue) specimens identified by the Rock Identifier community.
Sandstone
Arenite (composed primarily of SiO2)
Unidentified Rock
Unknown
Brecciated Jasper or Chert
SiO2
Schist
Metamorphic Rock (Schist)
Sandstone (likely Siltstone or Mudstone)
Clastic sedimentary rock (primarily SiO2 with various oxides)
Conglomerate / Breccia Matrix (Aggregated Rock)
Sedimentary Breccia / Conglomerate
Quartz
Silicon Dioxide (SiO2)
Blue Slag Glass
Amorphous Silica (Industrial byproduct)
Goldstone
Aventurine Glass (SiO2 + Cu small inclusions)
Slag (Industrial Byproduct)
Ferro-silicate glass (Slag)
Blue Goldstone
Aventurine Glass (Silicon Dioxide with metal inclusions)
Sea Glass (Frosted Glass)
Amorphous Silica (SiO2) with various additives
Green Aura Quartz (Titanium treated Kyanite or Quartz)
Silicon Dioxide (SiO2) or Aluminum Silicate (Al2SiO5) with Titanium/Metal Oxide coating
Sea Glass (Uranium/Vaseline Glass variant)
Silicon Dioxide (SiO2) with trace Uranium Oxide (U3O8)
Sandstone (Ferruginous)
Arenite (Fe-rich)
Ammonite Fossil
Ammonoidea subclass (calcium carbonate / silica replacement)
Dalmatian Stone (often called Dalmatian Jasper)
Peralkaline Feldsphathic Igneous Rock
Manhattan Schist
Manhattan Schist (Aluminous Metasedimentary Rock)
Quartz on Matrix
Silicon Dioxide (SiO2)
Sandstone
Arenite (SiO2 based)
Bauxite (Laterite Clay)
Bauxite (mixture of Hydrous Aluminum Oxides: Gibbsite Al(OH)3, Boehmite and Diaspore AlO(OH))
Agate Geode
Silicon Dioxide (Chalcedony/Quartz), SiO2
Sandstone (Gneissic or Banded)
Clastic Sedimentary Rock (composed predominantly of SiO2)
Quartz Pebble
Silicon Dioxide (SiO2)
Chert (Flint)
Microcrystalline quartz (SiO2)
Conglomerate
Polymictic Conglomerate
Alabaster
Gypsum (Calcium Sulfate Dihydrate, CaSO4·2H2O)
Petrified Wood
Silicified Wood (SiO2)
Chert (Jasper variation)
Silicon Dioxide (SiO2)
Chert (Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Chert (Green Fossilized Algae or Jasper)
Silicon Dioxide (SiO2)
Chert (Yellow Jasper/Flint)
Silicon dioxide (SiO2) - Cryptocrystalline Quartz
Picture Jasper
Silicon Dioxide (SiO2)
Chert (Commonly known as Jasper or Flint)
Microcrystalline Quartz (SiO2)
Chert (Chert Pebble)
Microcrystalline or cryptocrystalline Quartz (SiO2)
Jasper Breccia
Silicon Dioxide (SiO2) with impurities
Concretion
Sedimentary Concretion (e.g., Siderite or Ironstone)
Glauconite (Greensand)
(K, Na)(Fe3⁰, Al, Mg)₂(Si, Al)₄O₁₀(OH)₂
Sandstone Concretion
Clastic Sedimentary Concretion (primarily SiO2 with Fe2O3 cement)
Chert (specifically Jasper)
Silicon dioxide (SiO2) with iron oxide inclusions
Rounded river cobble, likely weathered sandstone or siltstone
Quartz-rich clastic sedimentary rock; exact identification requires a fresh surface and testing
Quartz Geode Fragment
Silicon Dioxide (SiO2)