Sedimentary Mineral

Agate (Dyed High-Grade Polished Slice)

Silicon dioxide (SiO2), Chalcedony crystal variety

Quartz

Quartz (Silicon Dioxide - SiO2)

Red Jasper

Silicon Dioxide with Iron inclusions (SiO2)

Chert (Common Opal/Chalcedony)

Microcrystalline Quartz (SiO2)

Brecciated Jasper

Silicon Dioxide (SiO2) with Hematite inclusions

Liesegang Ring Siltstone

Siltstone with iron oxide Liesegang bands

Fluorite in Matrix

Fluorite (CaF2) within a host rock matrix

Chert (Iron-stained)

Silicon Dioxide (SiO2)

Red Sandstone

Arenite (Fe2O3-rich)

Red Jasper (Chert)

Silicon Dioxide (SiO2) with impure Iron Oxides

Ironstone Concretion (Limonite/Goethite)

Iron oxide concretion (contains FeO(OH)·nH2O)

Ironstone Nodules / Siderite Concretion

Siderite (FeCO3) / Ferruginous Septarian Concretion

Fossilized Shark Tooth

Fossilized Elasmobranchii tooth (likely Odontaspis or Carcharias)

Jasper with Quartz Druzy

Silicon Dioxide (SiO2)

Red Jasper

Silicon Dioxide (SiO2) with impure Iron oxides

Agate

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Banded Iron Formation

Banded Iron Formation (BIF)

Gneiss (High-grade Metamorphic Rock)

Gneiss (Metamorphic silicate rock)

Black Opal

Amorphous Hydrated Silica (SiO2·nH2O)

Jasper (likely Polychrome or Desert Jasper)

Silicon Dioxide (SiO2) with impurities

Jasper with Quartz Vein

Silicon Dioxide (SiO2) with impurities

Sandstone (Wonderstone)

Arenite (composed primarily of SiO2 with Fe2O3 impurities)

Chert (vuggy variety)

Microcrystalline silica (SiO2)

Banded Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

Opal

Hydrous silicon dioxide (SiO2·nH2O)

Chert (Flint Nobule)

Silicon Dioxide (SiO2)

Petrified Wood

Silicified Wood (SiO2)

Blue Calcite

Calcium Carbonate (CaCO3)

Petrified Wood

Silicified wood (primarily SiO2)

Banded Iron Formation (BIF)

Banded Iron Formation (Fe2O3 + SiO2)

Moqui Marble / Ironstone Concretion

Ironstone Concretion (Goethite/Hematite and Sandstone)

Calligraphy Stone

Mariam Jasper (Fossiliferous Limestone with Hematite and Iron)

Chert (Jasper)

Microcrystalline Quartz (SiO2)

Common Green Opal

Hydrated amorphous silicon dioxide (SiO2·nH2O)

Pebble (Likely Basalt or Siltstone)

Clastic sedimentary rock or mafic volcanic rock

Yellow Chert or Jasper

Silicon Dioxide (SiO2)

Jasper (Picture Jasper variety)

Silicon Dioxide (SiO2) with impurities

Conglomerate (River Rock Aggregate)

Conglomerate (Lithic-clast conglomerate)

Greywacke (River/Beach Pebble)

Greywacke (Impure Sandstone)

Bauxite

Bauxite (mixture of Gibbiste Al(OH)3, Boehmite ̳-AlO(OH), and Diaspore ́-AlO(OH))

Almandine Garnet in Schist Matrix

Almandine - Fe3Al2(SiO4)3

Agate and Amethyst (Quartz variants)

Silicon Dioxide (SiO2) - Microcrystalline Quartz and Crystalline Quartz