Sedimentary Rock

Garnet Schist

Almandine Garnet in Mica Schist (Fe3Al2(SiO4)3)

Schist

Mica Schist (primarily Muscovite or Biotite sheet silicates)

Chert (often called Jasper or River Rock)

Chert (SiO2)

Banded Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Jasper with Quartz inclusions

Silicon Dioxide (SiO2) - Microcrystalline Chalcedony

Red Sandstone

Arenite (Ferruginous Sandstone)

Red Jasper with Quartz Veining

Silicon Dioxide (SiO2) - Microcrystalline Quartz with Iron Oxide impurities (Hematite)

Tufa (Limestone)

Calcareous Tufa (CaCO3)

Jasper / Chert (River Pebble)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Red Jasper

Jasper (Silicon Dioxide, SiO2 with Iron Oxide impurities)

Jasper (likely Lake Superior Jasper)

Jasper (Silicon Dioxide, SiO2)

Jasper with Hematite inclusions

Silicon Dioxide (SiO2) with Ferric Oxide (Fe2O3)

Jasper (Iron-rich Microcrystalline Quartz)

Silicon Dioxide (SiO2) with Hematite inclusions

Chert (Iron-stained)

Microcrystalline Quartz (SiO2)

Chert Nodule (Commonly known as Flint or River Rock)

Silicon Dioxide (SiO2)

Gneiss

Gneiss (High-grade metamorphic rock)

Jasper and Quartz River Cobble

Silicon Dioxide (SiO2) with Hematite inclusions

Geode Nodules / Chalcedony Geode

Silicon Dioxide (SiO2) - Amorphous to Cryptocrystalline Quartz

Coquina

Biogenic Limestone (Calcium Carbonate - CaCO3)

Fossil Coral (Honeycomb Coral)

Favosites (extinct genus of Tabulate coral)

Petrified Wood

Silicified Wood (SiO2)

Breccia

Breccia

Specular Hematite

Specularite (Fe2O3)

Chert (Jasper/Flint variant)

Silicon Dioxide (SiO2)

Chert / Jasper

Microcrystalline Quartz (SiO2)

Quartz Vein with Host Rock (Greywacke/Siltstone)

Silicon Dioxide (SiO2) within Clastic Sedimentary/Metamorphic Matrix

Sandstone (Quartzose)

Arenite (primarily SiO2)

Agate

Chalcedony (cryptocrystalline variety of Quartz, SiO2)

Quartz (Milky/Clear variety)

Silicon Dioxide (SiO2)

Dendritic Agate

Dendritic Agate (Silicon Dioxide with Manganese or Iron Oxide inclusions, SiO2)

Moss Agate

Silicon Dioxide (SiO2) with inclusions of Manganese or Iron oxides

Clear Quartz Cluster

Quartz (Silicon Dioxide - SiO2)

Orange Calcite

Calcium Carbonate (CaCO3)

Yellow Chalcedony

Silicon Dioxide (SiO2)

Banded Gneiss with Quartz Vein

Foliated Metamorphic Rock (Gneiss)

Turquoise

Hydrous phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)

Folded Schist / Gneiss (Metamorphic Rock)

Regional Metaphoric Folded Outcrop (predominantly Schist/Gneiss)

Chert (or Flint)

Chert (Sedimentary Cryptocrystalline Sio2)

Sandstone

Arenite (primarily SiO2)

Sandstone (with cross-bedding)

Arenite (composed primarily of Quartz: SiO2)

Greenstone / Diabase Porphyry

Porphyritic Diabase (Micro-gabbro)

Dalmatian Stone (Dalmation Jasper)

Aplite with Arfvedsonite inclusions