Sedimentary Mineral

Orange Calcite

Calcium Carbonate (CaCO3)

Pyrite in Shale

Iron Sulfide (FeS2)

Orange Calcite

Calcium Carbonate (CaCO3)

Yellow Calcite (Banded Calcite)

Calcium Carbonate (CaCO3)

Red Jasper

Silicon dioxide (SiO2) with iron oxide inclusions

Chalcedony Nodule (Carnelian/Agate)

Chalcedony (Silicon Dioxide, SiO2)

White Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Chalcedony

Cryptocrystalline Quartz (SiO2)

Glauconitic Sandstone

Glauconitic Quartz-Wacke / Sandstone (Fe(II),Fe(III),Al,Mg)2-3(Si,Al)4O10(OH)2

Sandstone (likely Ferruginous)

Arenite (SiO2 with iron oxide impurities)

Banded Gneiss (with Quartz Vein)

Gneiss (Metamorphic rock of varying mineralogy)

Ferruginous Sandstone

Clastic sedimentary rock (SiO2 with Fe2O3/FeO(OH) cement)

Jasper with Dendritic Inclusions

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Quartz Druzy on Geode Fragment

Silicon Dioxide (SiO2)

Quartz (Smoky/Milky variety)

Silicon Dioxide (SiO2)

Yellow Jasper with Dendritic Inclusions

Silicon Dioxide (SiO2) with Manganese/Iron Oxide inclusions

Bauxite

Bauxite (mixture of Hydrous Aluminum Oxides)

Bauxite

Bauxite (Al(OH)3, γ-AlO(OH), and α-AlO(OH))

Jet

Lignite (Anthracite-grade compact coal)

Red Jasper

Silicon Dioxide (SiO2) with Hematite (Fe2O3)

Picture Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Yellow Jasper

Jasper (Silicon Dioxide, SiO2)

Ironstone concretion / Limonitic Sandstone

Goethite/Hematite Cemented Sandstone (Hydrated Iron Oxide)

Petrified Wood (Silicified Wood)

Silicified fossil wood (SiO2)

Yellow Jasper

Silicon Dioxide (SiO2) with goethite or limonite inclusions

Yellow Jasper

Jasper (Silicon Dioxide with Iron Oxide inclusions), SiO2

Ironstone Concretion / Limonite Node

Goethite and Limonite (FeO(OH) nH2O)

Chert (Yellow Jasper/Flint)

Microcrystalline Quartz (SiO2)

Clear Quartz (Rock Crystal)

Quartz (Silicon Dioxide, SiO2)

Chert Concretion (with typical hematite/limonite staining)

Sedimentary Concretion (SiO2 with FeO(OH)⋅nH2O)

Gneiss

Gneiss (High-grade metamorphic rock)

Biotite Schist

Biotite Schist

Quartz (in a rock matrix)

Quartz (SiO2)

Hematite

Iron(III) oxide (Fe2O3)

River Rocks (Basalt and Sedimentary Stones)

Mafic Igneous Rock (Basalt) and Clastic Sedimentary Rock

Sandstone (specifically Arkose or Ferruginous Sandstone)

Sandstone (SiO2 with iron oxide inclusions)

Sandstone (with Iron concretions/staining)

Arenite (composed primarily of Quartz and Feldspar with Iron Oxide cement)

Sandstone (Ferruginous)

Ferruginous Sandstone (SiO2 with Fe2O3/FeO(OH) cement)

Celestite (Celectine)

Strontium sulfate (SrSO4)

Garnet (Almandine)

Almandine (Fe3Al2(SiO4)3)

Celestine (or Celestite)

Celestine (Strontium Sulfate, SrSO4)

Red Jasper

Silicon Dioxide (SiO2) with Hematite inclusions