Sandstone with Brachiopod Mold Fossil
Sedimentary rock (Sandstone) with indeterminate Brachiopod mold
Category
Browse anthropogenic sedimentary (man made) specimens identified by the Rock Identifier community.
Sandstone with Brachiopod Mold Fossil
Sedimentary rock (Sandstone) with indeterminate Brachiopod mold
Gravel/Common Siltstone
Siltstone (fine-grained siliciclastic sedimentary rock)
Sandstone (Ferruginous)
Arenite (Fe-bearing Clastic Sedimentary Rock)
Coal (Bituminous or Anthracite)
Carbonaceous sedimentary rock (primarily Carbon, C)
Conglomerate
Conglomerate (Clastic Sedimentary Rock)
Limestone with Calcite Veins
Sedimentary Calcium Carbonate (CaCO3)
Fossiliferous Limestone
Limestone with fossil inclusions (CaCO3)
Sandstone (River Pebble)
Arenite (SiO2 based)
Sandstone (likely Quartzose)
Arenite (primarily SiO2)
Sandstone
Arenite (composed primarily of SiO2)
Weathered sandstone or quartz-rich sedimentary pebble
Indeterminate lithic fragment; likely quartz arenite (sandstone)
Chert/Flint
Silicon dioxide (SiO2)
Quartz (Agate/Chalcedony)
Silicon Dioxide (SiO2)
Chert (Chalcedony/Flint)
Microcrystalline Quartz (SiO2)
Quartz
Silicon Dioxide (SiO2)
Hematoid Quartz
Silicon Dioxide with Iron Oxide (SiO2 + Fe2O3)
Granitic Gneiss
Gneiss (quartz-feldspar-mica complex)
Pink Satin Spar (Satin Spar Selenite Dyed)
Gypsum (CaSO4·2H2O)
Chert (specifically Yellow or River Chert)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Sandstone (Pebble)
Arenite (primarily SiO2)
Jasper
Silicon Dioxide (Microcrystalline Quartz, SiO2)
Red Sandstone Pebble
Quartzose Sandstone
Jasper
Microcrystalline quartz (SiO2)
Fossil Bivalve / Ostreid Shell (Hag Stone / Perforated Pebble)
Phylum Mollusca, Class Bivalvia
Shark Tooth Fossil
Selachii fossil
Pyrite in Quartz Matrix
Iron Sulfide (FeS2) embedded in Silicon Dioxide (SiO2)
Imperial Jasper
Microcrystalline Quartz (Chalcedony), SiO2
Sandstone
Sedimentary rock composed mainly of sand-sized minerals or rock grains
Chert / Flint
Microcrystalline Quartz (SiO2)
Quartz Pebble
Silicon Dioxide (SiO2)
Shark Tooth Fossil
Carcharocles megalodon or similar extinct shark tooth
Gastropod Fossil
Class Gastropoda (fossilized)
Jasper
Silicon Dioxide (Microcrystalline Quartz, $SiO_2$)
Jasper
Microcrystalline Quartz (SiO2)
Sandstone with Dendritic Inclusions
Quartzose Sandstone
Sandstone Pebble
Arenite (SiO2 dominated with iron oxide)
Green Chert
Microcrystalline Quartz (SiO2)
Red Sandstone
Arenite (Ferruginous Sandstone)
Fossilized Bone Chunk
Permineralized Vertebrate Bone (indeterminant)
Milky Quartz
Silicon dioxide (SiO2)
Fossilized Bone Fragment
Vertebrate Fossil
Sandstone
Arenite (primarily SiO2)