Sedimentary (Primary) With Artificial Modification

Limestone

Calcium Carbonate (CaCO3)

Sandstone (Ferruginous)

Arenite (variable SiO2 with Fe2O3 staining)

Sandstone with Algae Growth

Arenite with Chlorophyta/Lichen

Sandstone

Arenite (primarily SiO2)

Chert (Pink Jasper variant)

Microcrystalline Quartz (SiO2)

Limestone

CaCO3 (Mainly Calcite or Aragonite)

Sandstone

Arenite (composed primarily of SiO2)

Sandstone (Ferruginous)

Ferruginous Sandstone (SiO2 with Fe2O3)

Sandstone (Ferruginous)

Arenite (primarily SiO2 with Fe2O3 staining)

Sandstone (Ferruginous)

Arenite with Iron Oxide cement (primarily SiO2 with Fe2O3)

Fossiliferous Shale

Laminated Mudrock with plant fossils

Sandstone (Muddy/Silty Variety)

Arenite with high silt/clay content (clastic sedimentary rock)

Sandstone (likely River-tumbled Picture Sandstone)

Arenite (predominantly SiO2 with iron oxide impurities)

Sandstone

Arenite (primarily composed of SiO2)

Sandstone (Quartz-rich)

Arenite (SiO2 based clastic rock)

Limestone (Fossiliferous)

Calcium Carbonate (CaCO3) - Bioclastic Limestone

Limestone

Calcium Carbonate (CaCO3)

Limestone (Micrite/Chalky variety)

Calcium Carbonate (CaCO3)

Quartz Geode (likely within Limestone or Dolomite matrix)

Quartz (SiO₂)

Chert (often called Flint or River Pebble)

Microcrystalline Quartz (SiO2)

Dalmatian Stone (often called Dalmatian Jasper)

Peralkaline Feldsphathic Igneous Rock

Orbicular Rhyolite (Rainforest Jasper)

Rhyolite containing Spherulites (SiO2 with impurities)

Dalmatian Stone

Dalmatian Jasper (actually a Peralkaline Igneous Rock)

Chert (specifically Jasper or Flint type)

Microcrystalline Quartz (SiO2)

Red Jasper

Jasper (Silicon Dioxide, SiO2)

Red Jasper

Red Jasper (SiO2 with Fe2O3 impurities)

Yellow Jasper

Silicon Dioxide (SiO2) with goethite or iron oxide inclusions

Kambaba Jasper (Crocodile Jasper)

Stromatolite (Fossilized Algae)

Serpentine Schist with Quartz Vein

Serpentine Schist (a type of Metamorphic rock). The white band is likely Quartz (SiO2).

Amethyst with Marcasite accents

Amethyst (Silicon Dioxide SiO2) and Marcasite (Iron Sulfide FeS2)

Greywhacke (River Pebble)

Graywacke (immature sandstone)

Quartz Geode

Silicon Dioxide (SiO2)

Chalcedony (Common Opal variant or Agate)

Silicon Dioxide (SiO2)

Milky Quartz Pebble with Chert

Silicon Dioxide (SiO2)

Turquoise in Matrix

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

Pink Garnet (likely Almandine or Rhodolite)

Garnet Group (Fe3Al2(SiO4)3 to Mg3Al2(SiO4)3)

Rhodonite

Manganese Silicate (Mn,Fe,Mg,Ca)SiO3

Fuchsite in Quartz

K(Al,Cr)2(AlSi3O10)(OH)2 (Muscovite with Chromium)

Gneiss

Gneiss (High-grade Metamorphic Rock)

Quartz (Drusy/Crystalline)

Silicon Dioxide (SiO2)

Pyrite

Iron Disulfide (FeS2)

Jasper (Green Jasper / Chert)

Silicon Dioxide (SiO2) with iron/clay inclusions