Sandstone (Ferruginous)
Arenite (with Goethite/Limonite cement)
Category
Browse sedimentary (artificial) specimens identified by the Rock Identifier community.
Sandstone (Ferruginous)
Arenite (with Goethite/Limonite cement)
Ocean Jasper
Orbicular Jasper (Silicon Dioxide, SiO2)
Fossiliferous Limestone with Rugose Coral
Calcite (CaCO3) matrix containing Rugosa (order of extinct solitary and colonial corals)
Limonite (Iron Stone Concretion)
Limonite (Hydrous Iron Oxide) - FeO(OH)·nH2O
Blue Calcite
Calcium Carbonate (CaCO3)
Botryoidal Pyrite
Iron Sulfide (FeS2)
Jasper (Red Jasper)
Silicon Dioxide (SiO₂)
Fossiliferous Limestone with Brachiopods
Calcium Carbonate (CaCO3) with fossilized Brachiopoda sp. (likely Order Spiriferida or Rhynchonellida)
Chert (Common Opal/Jasper variety)
Microcrystalline Quartz (SiO2) with hydration
Orange Calcite
Calcium Carbonate (CaCO3)
Red Jasper
Silicon Dioxide (SiO2) with iron oxide impurities
Satin Spar (Selenite)
Gypsum (CaSO4·2H2O)
Puddingstone (Gowganda Tillite/Lorrain Quartzite)
Jasper Conglomerate
Sandstone (Ferruginous)
Arenite (primarily SiO2 with Fe2O3 staining)
Sandstone
Quartz Sandstone (predominantly)
Shale creek bed
Shale (fine-grained clastic sedimentary rock)
Sandstone (likely Arkosic)
Clastic Sedimentary Rock
Hag Stone
Perforated Sedimentary Rock
Sandstone Cobble
Clastic Sedimentary (Sandstone)
Breciated Limestone with Calcite Veins
Sedimentary Breccia (CaCO3)
Shale or Siltstone
Sedimentary Rock (Siliciclastic)
Sandstone (likely Siltstone or fine-grained Sandstone)
Sedimentary Rock (Clastic)
Conglomerate
Clastic Sedimentary (Conglomerate)
Limestone Breccia
Sedimentary Breccia (Calcareous)
Siltstone or Mudstone
Argillaceous sedimentary rock
Sandstone or Quartzite
Arenite (if sedimentary) / Quartzite (if metamorphic)
Hag Stone
Siltstone or Fine-grained Sandstone with boring (e.g., Lithophaga impact)
Sandstone (Ferruginous)
Sandstone (primarily SiO2 with Iron Oxide cement)
Septarian Nodule (Septarian Dragon Stone)
Septarian Concretion (Composition: Calcite, Aragonite, and Limestone/Clay)
Conglomerate (Red Sandstone variety)
Clastic Sedimentary Rock (Conglomeratic Sandstone)
Chert
Chert (variant of microcrystalline quartz)
Blue Calcite
Calcium Carbonate (CaCO3)
Orange Calcite (likely polished specimen)
Calcite
Pyrite
Iron Disulfide (FeS2)
Quartz-veined Siltstone
Siltstone with Quartz (SiO2) veins
Red Jasper
Silicon Dioxide with Hematite impurities (SiO2 + Fe2O3)
Sedimentary rock with quartz veining
Laminated siltstone or mudstone with hydrothermal quartz veins
Sedimentary Sandstone (Sandstone Slab)
Arenite (SiO2 with Fe2O3 staining)
Fossil Shell in Sedimentary Matrix
Bivalvia (fossil) in Calcium Carbonate Matrix
Sandstone
Arenite (primarily SiO2)
Fossilized Bivalve Shell
Bivalvia (fossil specimen)
Concretion (Sandstone)
Sandstone Concretion