Anthracite Coal
Anthracite (Carbon based)
Category
Browse sedimentary (fossilized) specimens identified by the Rock Identifier community.
Anthracite Coal
Anthracite (Carbon based)
Dalmatian Stone
Dalmatian Jasper (Aplitic Rock)
Ironstone concretion / Limonitic Sandstone
Goethite/Hematite Cemented Sandstone (Hydrated Iron Oxide)
Pyrite
Iron Sulfide (FeS2)
Chert / Flint
Microcrystalline Quartz (SiO2)
Polygenetic Conglomerate (Puddingstone)
Conglomerate (SiO2 matrix with mixed clasts)
Petrified Wood
Silicified Wood (primarily SiO2)
Ironstone Concretion (Limonite/Goethite)
Ironstone (primarily FeO(OH)·nH2O)
Chert (White/Gray variety)
Chert (SiO2)
Jasper (specifically a banded or dark variety)
Silicon Dioxide (SiO2) with impurities
Chert (Jasper/Iron-stained Quartzite)
Silicon Dioxide (SiO2)
Chert (and/or Flint)
Chert (Cryptocrystalline variety of Quartz, SiO2)
Chert (specifically Flint or Gray Chalcedony)
Microcrystalline Quartz (SiO2)
Petrified Wood
Silicified Wood (SiO2)
Banded Chert
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Chert (Novaculite Variety)
Microcrystalline Quartz (SiO2)
Chert (Nodule/Pebble)
Chert (Silicon Dioxide, SiO2)
Chert (Flint variety)
Chert (Microcrystalline or Cryptocrystalline Quartz), SiO2
Oolite or Oolitic Limestone
Oolitic Limestone (Principal mineral: Calcite, CaCO3)
Chert (Jasper/Flint variety)
Microcrystalline Quartz (SiO2)
Chert with Asphaltum (or Tar)
Silica (SiO2) with natural Bitumen/Asphaltum
Quartz (likely Jasper or Chert variety)
Quartz (SiO₂)
Pyrite
Iron Pyrite (FeS2)
Chert
Chert (SiO2)
Ferruginous Sandstone (Gozzan/Ironstone)
Arenite with Limonite/Goethite cement (FeO(OH)·nH2O)
Shale
Argillaceous Rock
Limestone
Calcium carbonate (CaCO3)
Sandstone
Arenite (SiO2 based with various mineral cements)
Sandstone (Greywacke/Siltstone variant)
Clastic Sedimentary Rock (composed primarily of Quartz SiO2 and Feldspar)
Sandstone
Arenite (composed primarily of SiO2)
Sandstone
Arenite (primarily SiO2)
Limestone
Calcium Carbonate (CaCO3)
Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
Sandstone (Micaceous/Feldspathic variant)
Arenite (specifically subarkose or lithic arenite)
Limestone
Calcareous sedimentary rock (primarily Calcium Carbonate, CaCO3)
Limestone
Calcium Carbonate (CaCO3)
Sandstone
Arenite (primarily SiO2)
Limestone
Calcium Carbonate (CaCO3)
Sandstone
Arenite
Sandstone
Arenite (primarily SiO2)
Shale with Iron Oxide Staining
Fissile Mudstone (primarily clay minerals and quartz)
Red Mudstone (Siltstone)
Lutite (primarily Quartz and Clay minerals with Hematite)