Moqui Marble (Iron Concretion)
Iron Oxide Concretion (Goethite/Hematite Cemented Sandstone)
sedimentary
Category
Sedimentary Rock
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Wonderstone (Liesegang Sandstone)
Silicified Sandstone with Liesegang Rings (SiO2 + FeO(OH))
sedimentary
Jasper
Jasper (Cryptocrystalline variety of Quartz, SiO2)
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Sandstone (Ferruginous)
Arenite (primarily SiO2 with iron oxide staining/cementing)
sedimentary
Sandstone (specifically Arkose or Ferruginous Sandstone)
Sandstone (SiO2 with iron oxide inclusions)
sedimentary
Sandstone (Ferruginous)
Ferruginous Sandstone (SiO2 with Fe2O3/FeO(OH) cement)
sedimentary
Red Sandstone (Siltstone Pebble)
Arenite / Siltstone with Iron Oxide (Fe2O3)
sedimentary
Sandstone (Quartzose Sandstone)
Arenite
sedimentary
River Pebble Gravel
Hydrothermally modified Clastic Sediment (mainly Quartzite and Chert)
sedimentary
Sandstone
Arenite (SiO2 with various cementing agents)
sedimentary
River Pebble (Quartz-rich)
Silicon Dioxide (SiO2) with various inclusions
sedimentary
Sandstone (with Iron Staining)
Arenite (composed primarily of SiO2 with Fe2O3 staining)
sedimentary
Septarian Nodule
Septarian concretion (Complex mixture of Siderite/Limestone, Calcite, and Aragonite)
sedimentary
Chert (White/Gray variety)
Chert (SiO2)
sedimentary
Petrified Wood
Silicified Wood (primarily Chalcedony or Quartz, SiO2)
sedimentary
Quartz Vein in Host Rock (clastic sediment)
Silicon Dioxide (SiO2) in matrix
sedimentary
Fossiliferous Limestone with Crinoid Stem fragment
Calcite (CaCO3) containing Crinoidea fossils
sedimentary
Greywacke
Lithic Wacke
sedimentary
Chert (Iron-stained)
Microcrystalline silica (SiO2) with Hematite/Limonite
sedimentary
Coquina
Biogenic Limestone (Calcitic)
sedimentary
Breciated Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Ferruginous Sandstone (Gritstone)
Arenite with Iron-Oxide Cement (SiO2 with Fe2O3 and FeO(OH))
sedimentary
Coquina
Coquina (Bioclastic Calcarenite)
sedimentary
Graywacke with Quartz Vein
Lithic Sandstone (Graywacke)
sedimentary
Sandstone (likely Ferruginous)
Arenite (primarily SiO2 with Fe2O3 staining)
sedimentary
Red Shale
Lutite (primarily composed of Hydrous Aluminum Silicates with Hematite staining)
sedimentary
Fossiliferous Limestone
Calcareous biomicrite / Bioclastic limestone
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Chert with Quartz/Calcite Vein
Microcrystalline Silica (SiO2)
sedimentary
Fossiliferous Limestone (Crinoid stem)
CaCO3 (Calcium Carbonate) with Fossil Inclusions
sedimentary
Petoskey Stone (Petrified Favosites)
Favosites (extinct colonial coral), CaCO3 with Silica replacement
sedimentary
Quartz Sand/Gravel
Silicon Dioxide (SiO2)
sedimentary
Puddingstone
Conglomerate (Indurated)
sedimentary
Bumblebee Jasper
Fossiliferous Calcite containing Orpiment and Realgar
sedimentary
Bauxite
AlOx(OH)3-2x (mixture of Gibbsite, Boehmite, and Diaspore)
sedimentary
Picture Jasper
Silicon Dioxide (SiO2) with iron oxide and clay inclusions
sedimentary
Chert (River Pebble)
Microcrystalline silicon dioxide (SiO2)
sedimentary
Quartz Geode
Crystalline Silicon Dioxide (SiO2) within a nodule
sedimentary
Limonite (Iron Ore)
Limonite; FeO(OH)·nH2O
mineral
River Rocks and Pebbles
Mixed Silica-rich Sediments (SiO2 based)
sedimentary
Greenstone / Diabase Porphyry
Porphyritic Diabase (Micro-gabbro)
Igneous