Sandstone (Ferruginous)
Clastic sedimentary rock (primarily SiO2 with Fe2O3 cement)
Category
Browse man made rock (sedimentary analogue) specimens identified by the Rock Identifier community.
Sandstone (Ferruginous)
Clastic sedimentary rock (primarily SiO2 with Fe2O3 cement)
Sandstone (Quartzite-rich River Cobble)
Clastic sedimentary rock (primarily SiO2)
Limestone
Calcium Carbonate (CaCO3)
Limestone
Calcium Carbonate (CaCO3)
Banded Gneiss
Gneiss
Puddingstone (Jasper Conglomerate)
Conglomerate (specific type: Jasper Conglomerate or Hertfordshire Puddingstone)
Chert (specifically Yellow or River Chert)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Sandstone (Banded)
Clastic Sedimentary Rock (primarily SiO2)
Sandstone (Quartzose)
Arenite (Formula: SiO2 primary, with various cements)
Chert (or Flint)
Silicon dioxide (SiO2)
Banded Gneiss
Gneiss (High-grade metamorphic rock)
Sandstone (Ferruginous)
Arenite with Iron Oxide cement
Sandstone with Concretions / Liesegang Rings
Arenite with iron oxide banding
Travertine
Calcareous Tufa (CaCO3)
Sandstone (with Iron Staining)
Clastic sedimentary rock (primarily Quartz with Fe2O3 staining)
Chert (Nodule)
Silicon dioxide (SiO2) - Cryptocrystalline Quartz
Sandstone (Quartzose)
Arenite (SiO2 based)
Limestone
Calcium Carbonate (CaCO3)
White Jade (Nephrite)
Nephrite, Ca2(Mg,Fe)5Si8O22(OH)2
Breciated Limestone with Calcite Veins
Sedimentary Breccia (CaCO3)
Jasper (Green Jasper/Heliotrope variety)
Silicon Dioxide (SiO2)
Carnelian
Chalcedony (SiO2) with Iron Oxide inclusions
Chert / Chalcedony Nodules
Silicon Dioxide (SiO2)
Pyrite-rich Ore
Pyrite (FeS2) with secondary minerals
Chert (Flint)
Silicon dioxide (SiO2)
Chert (Flint)
Chert (Microcrystalline Quartz, SiO2)
Chert (often called Flint in various colors)
Silicon Dioxide (SiO2)
Carnelian Agate
Silicon Dioxide (SiO2)
Chert (Common Opal/Jasper variety)
Microcrystalline Quartz (SiO2)
Chert / Flint
Microcrystalline or cryptocrystalline quartz (SiO2)
Amethyst (Geode/Druzy)
Silicon Dioxide (SiO2) with iron impurities
Green Aventurine
Silicon dioxide (SiO2) with fuchsite inclusions
Breciated Chert
Brecciated Chert (Microcrystalline Quartz, SiO2)
Jasper
Silicon Dioxide (SiO2) with impurities
Quartz Geode
Silicon Dioxide (SiO2) - Crystalline Quartz
Sandstone
Sandstone (lithified quartz arenite, arkose, graywacke, etc. depending on composition)
Bituminous Coal
Bituminous coal (Carbonaceous sedimentary rock)
Ferruginous Sandstone Pebble
Arenite with Iron Oxide matrix
Fossiliferous Shale
Laminated Mudrock with plant fossils
Fossiliferous Limestone
Biogenic Limestone (Calcium Carbonate, CaCO3)
Sandstone (Quartzose Sandstone Pebble)
Arenite (primarily SiO2)
Quartz Druze (Crystalline Quartz)
Silicon Dioxide (SiO2)