Sedimentary (Or Mineraloid)

Sandstone (specifically Red Sandstone)

Arenite (SiO2 with Iron Oxide)

Yellow Jasper

Silicon Dioxide (SiO2) with Iron inclusions

Chert (with Quartz Veining)

Microcrystalline Quartz (SiO2)

Chert (Jasper variety)

Silicon Dioxide (SiO2)

Chert (specifically Pink/Tan Chert)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Jasper with Hematite inclusions

Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3)

Red Sandstone

Arenite (primarily Quartz with Hematite cement)

Ferruginous Sandstone

Arenite with Hematite/Limonite cement

Fossiliferous Limestone (Crinoidal)

Bioclastic Limestone (predominantly CaCO3)

Fossiliferous Limestone with Rugose Coral

Rugosa (order), typically preserved in CaCO3 (Calcite)

River Jasper (Chert/Chalcedony mix)

Silicon Dioxide (SiO2) with iron oxide and chlorite inclusions

Chert (Jasper/Flint variety)

Microcrystalline Quartz (SiO2)

Ironstone (likely siderite or goethite-rich siltstone)

Ferruginous Siltstone

Ammonite Fossil

Ammonoidea (subclass)

Coal (specifically Bituminous or Anthracite)

Organic sedimentary rock; primarily Carbon (C) with varying H, S, O, N

Jasper

Silicon Dioxide (SiO₂)

Sandstone (Red)

Arenite (primarily SiO2 with Iron Oxide staining)

Chert (Jasper variety)

Chert (SiO2)

Sandstone (Red/Brown Variety)

Arenite (composed primarily of SiO2 with Fe2O3 iron oxide inclusions)

Ammonite Fossil

Ammonoidea (subclass)

Dendritic Limestone

Calcite with Manganese Oxide (Manganese Dendrites)

Chert (Iron-stained)

Microcrystalline Quartz (SiO2)

Chert (Iron-stained)

Microcrystalline Quartz (SiO2)

Sandstone

Arenite (primarily SiO2)

Fossiliferous Limestone with Brachiopod shell

Calcium carbonate (CaCO3)

Conglomerate

Conglomerate (Rock composed predominantly of rounded clasts > 2mm)

Chert Nodule

Microcrystalline Silica (SiO2)

Petrified Wood

Silicified Wood (SiO2)

Chert (Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (and/or Flint)

Microcrystalline or cryptocrystalline Quartz (SiO2)

Sandstone

Arenite (composed primarily of SiO2)

Chert (specifically Flint or Gray Chert)

Silicon Dioxide (SiO2)

Sandstone (with differential weathering)

Arenite / Quartz Sandstone (SiO2)

Limestone

Calcium Carbonate (CaCO3)

Mookaite Jasper

Silicified Radiolarite (SiO2)

Limestone with Weathering Rind

Calcium Carbonate (CaCO3) - Bioclastic or Micritic Limestone

Sandstone (specifically an Iron-Concretion)

Arenite with Iron Oxide (Limonite/Goethite) cementation

Dendritic Siltstone (or Mudstone)

Siltstone with Manganese Oxide dendrites

Chert Nodule (Fossiliferous Chert)

Microcrystalline Quartz (SiO2)

Lignite (Brown Coal)

Lignite (C189H155O6N3S)

Ferruginous Sandstone

Sandstone with Iron Oxide (Limonite/Goethite)

Chert (Nodule)

Crystalline Silicon Dioxide (SiO2)