Glauconitic Sandstone (or Greensand)
Glauconitic Siliciclastic Rock (Containing (K,Na)(Fe,Al,Mg)2(Si,Al)4O10(OH)2)
sedimentary
Category
Anthropogenic (Human Made) Sedimentary Like Material
Browse anthropogenic (human made) sedimentary like material specimens identified by the Rock Identifier community.
Massive Cryptocrystalline Quartz (Chert/Chalcedony Pebble)
Silicon Dioxide (SiO2)
sedimentary
Sandstone (with Iron Staining)
Clastic sedimentary rock (primarily Quartz - SiO2)
sedimentary
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Yellow Quartzite River Cobble
Meta-quartzite (SiO2 with iron oxide staining)
metamorphic
Banded Jasper (possibly "Picture Jasper")
Jasper (a microcrystalline variety of Quartz / Silicon Dioxide - SiO2)
Sedimentary rock (specifically a chemical sedimentary rock, or a chert if considered purely mineral aggregate)
Fossiliferous Rock (likely Dinosaur Fossil in Matrix)
Permineralized Vertebrate Fossil (Calcium Carbonate/Silica replaced bone material)
sedimentary
Chalcedony (Common Opal or Agate variant)
Silicon Dioxide (SiO₂)
mineral
Sandstone
Arenite (a specific type of sandstone with less than 15% matrix)
Sedimentary rock
Sandstone (Pebble/Cobble)
Sandstone (arenite is a more precise term for sandstone with less than 15% matrix; this specimen appears to be a lithic or quartz arenite)
Sedimentary
Desert Rose (also known as Sand Rose)
Gypsum (CaSO4·2H2O) or Barite (BaSO4) with sand inclusions
mineral
Orange Quartzite (River Pebble)
Quartzite (primarily SiO2)
metamorphic
Limestone
Calcareous sedimentary rock (CaCO3)
sedimentary
Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary
Red Sandstone
Clastic sedimentary rock (primarily SiO2 with Fe2O3 iron oxide staining)
sedimentary
Sandstone
Sandstone (lithified sand)
sedimentary
Pink Rhodonite
Manganese Silicate (MnSiO3)
mineral
Jasper (specifically Fancy or Polychrome Jasper)
Silicon Dioxide (SiO2) - Chalcedony
Sedimentary
Dendritic Agate (or Dendritic Opal)
SiO2 (for Agate), SiO2·nH2O (for Opal)
Mineral
Quartz
Quartz (SiO2 - Silicon Dioxide)
Mineral
Chert (Nodule)
Microcrystalline Quartz (SiO2)
sedimentary
Laterite
Laterite (Iron and aluminum-rich residual rock)
sedimentary
Blue Kyanite
Kyanite (Al2SiO5)
mineral
Aqua Aura Quartz
Silicon Dioxide (SiO2) bonded with Gold (Au)
mineral (treated)
Diamond (or Cubic Zirconia)
Carbon (C) or Zirconium Dioxide (ZrO2)
mineral
Bismuth
Bismuth (Bi)
mineral
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Chalk / Sedimentary Limestone
Calcium Carbonate (CaCO3) - Biogenic Sedimentary Rock
sedimentary
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Polygenetic Breccia
Clastic Breccia (containing lithic fragments in a fine-grained matrix)
sedimentary
Blue Apatite
Apatite (Calcium Phosphate) - Ca5(PO4)3(F,Cl,OH)
mineral
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Blue Kyanite
Kyanite (Al2SiO5)
mineral
Sandstone (with potential trace fossils)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Jasper and Basalt (Mixed Breccia or Chert)
Silicon Dioxide (SiO2) with Ferromagnesian silicates
sedimentary and igneous (mixed)
Chert (Yellow Jasper variant)
Microcrystalline Quartz (SiO2)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Libyan Desert Glass
Impact-melt silica glass (SiO2 + traces of Al, Fe, Ti)
mineral (Tektite/Impactite)
Yellow Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
Sandstone
Arenite (primarily Quartz SiO2)
sedimentary
Yellow Jasper
Silicon Dioxide (SiO2)
sedimentary (microcrystalline silicate)
Chert / Pink Chert
Silicon Dioxide (SiO2)
sedimentary