Conglomerate
Conglomerate (a clastic sedimentary rock)
Sedimentary
Category
Sedimentary (Fossilized Organic Remains)
Browse sedimentary (fossilized organic remains) specimens identified by the Rock Identifier community.
Conglomerate (Puddingstone)
Conglomerate (specifically, clastic sedimentary rock)
Sedimentary
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Satin Spar (Selenite variant)
Gypsum (Calcium Sulfate Dihydrate, CaSO4·2H2O)
mineral
Sandstone (with Iron Staining)
Clastic sedimentary rock (primarily Quartz with Limonite/Goethite staining)
sedimentary
Amethyst Geode
Amethyst (Silicon Dioxide), Formula: SiO2
mineral
River Rocks (Basalt and Sedimentary Stones)
Mafic Igneous Rock (Basalt) and Clastic Sedimentary Rock
igneous and sedimentary
Limestone (specifically a Crushed Aggregate fragment)
Calcium Carbonate (CaCO3)
sedimentary
Sandstone (Ferruginous)
Arenite (primarily SiO2 with Fe2O3 staining)
sedimentary
Sandstone (Quartz-rich)
Arenite (primarily SiO2)
sedimentary
Sandstone (likely Quartz Sandstone)
Arenite (composed primarily of SiO2)
sedimentary
Dalmation Stone
Peralkaline Rock (mixed silicate minerals)
igneous
Dalmation Stone (often called Dalmatian Jasper)
Peralkaline Rock (Microgranite/Aplite), SiO2 with inclusions of Arfvedsonite
igneous
Sandstone
Arenite (SiO2 primarily)
sedimentary
Sandstone
Arenite
sedimentary
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Goldfish Cracker (Culinary Mimic)
Cibus aurum (Commonly composed of Enriched Wheat Flour and Cheddar Cheese)
Anthropogenic Sedimentary-style Organic Solid
Chert (Yellow Jasper/River Pebble)
Microcrystalline Quartz (SiO2)
sedimentary
Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary
Sandstone
Arenite (SiO2 primarily)
sedimentary
Fossil Bivalve Shell
Class Bivalvia (e.g., Veneriidae family)
sedimentary
Sandstone (Ferruginous)
Arenite (with Iron Oxide)
sedimentary
Sandstone (Quartzose type)
Arenite (primarily SiO2)
sedimentary
Sandstone (with potential trace fossils)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Sandstone (likely Quartzose Sandstone with mineral staining)
Arenite (composed mainly of SiO2)
sedimentary
Reddish Brown Claystone or Siltstone
Argillite / Siltstone / Claystone
sedimentary
Sandstone (Micaceous)
Arenite (primarily SiO2 with Phyllosilicates)
sedimentary
Sandstone (Ferruginous)
Arenite with Iron Oxide cement
sedimentary
Sandstone (Red)
Arenite (Fe2O3 heavy)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Sandstone (Painted)
Arenite (primarily SiO2)
sedimentary
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
mineral
Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary
Sandstone (likely Arkose or Quartz Sandstone)
Arenite (SiO2 + varied clasts)
sedimentary
Piddock bored rock (likely Mudstone or Shale)
Ichnofossil (Gastrochaenolites borings) in Fine-grained Sedimentary Rock
sedimentary
Dendritic Agate or Manganese Nodule in Chert/Limestone
Silicon Dioxide (SiO2) with Manganese Oxide (MnO2) inclusions
sedimentary
Red Jasper (River Stone)
Jasper (Silicon Dioxide, SiO2 plus iron oxide inclusions)
sedimentary
Blue Chalcedony
Chalcedony (cryptocrystalline Silicon Dioxide, SiO2)
mineral
Blue Chalcedony
Chalcedony (Silicon Dioxide, SiO2)
mineral
Quartz
Quartz (SiO2 - Silicon Dioxide)
Mineral
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Limonite Pseudomorph after Pyrite
Limonite (FeO(OH)·nH2O) replacing Pyrite (FeS2)
mineral