Sedimentary Rock (Technically Chert, A Microcrystalline Quartz)

Granitic Gneiss

Gneiss (containing Potassium Feldspar and Quartz)

Red Jasper (River Pebble)

Jasper (Silicon Dioxide, SiO2)

Red Jasper

Silicon Dioxide (SiO2) with Hematite (Fe2O3) inclusions

Red Jasper

Silicon Dioxide (SiO2) with Hematite (Fe2O3) impurities

Turquoise

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

Red Jasper

Silicon Dioxide (SiO2) with Hematite inclusions

Jasper (Red)

Silicon Dioxide (SiO2)

Poppy Jasper

Jasper (variety of Chalcedony), SiO2 (Silicon Dioxide)

Ferruginous Sandstone (Gritstone)

Clastic sedimentary rock with iron-rich cement (FeO(OH)·nH2O)

Schist (Micaceous Schist)

Schist (comprising Muscovite/Biotite mica, Quartz, and Feldspar)

Gneiss

Gneiss (High-grade Metamorphic Rock)

Agate (specifically a Blue Agate Geode Slice)

Chalcedony (cryptocrystalline variety of Quartz); SiO2

Basalt River Pebble

Basalt (Aphanitic Mafic Volcanic Rock)

Snakeskin Agate

Agate (Cryptocrystalline Quartz, SiO2)

Septarian Nodule Segment (Turtle Stone)

Septarian Concretion (CaCO3 with Siderite or Calcite infill)

Imperial Jasper

Silicon Dioxide (SiO2) - Microcrystalline Quartz with Mineral Inclusions

Milky Quartz

Silicon Dioxide (SiO2)

Quartz (Milky or Cloudy Quartz)

Silicon Dioxide (SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Chert (varietal: Flint or River Pebble)

Silicon Dioxide (SiO₂)

Gneiss (specifically a Granitic Gneiss)

Gneiss (typically composed of Quartz, Feldspar, and Mica/Amphiboles)

Gossan with Copper Carbonate (Chrysocolla/Malachite)

Ferruginous Oxide (Gossan) with Cu2CO3(OH)2 (Malachite) or (Cu,Al)2H2Si2O5(OH)4 (Chrysocolla)

Red Sandstone

Arenite (with Iron Oxide)

Banded Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

Yellow Quartzite

Quartzite (SiO2 with iron oxide inclusions)

River Quartz Pitting / Quartzite Pebble

Quartzite (primarily SiO2)

Carnelian

Carnelian (SiO2 - Silicon Dioxide)

Yellow Jasper

Jasper (Silicon Dioxide, SiO2)

Basalt-Amugydule (Amygdaloidal Basalt)

Aphanitic Mafic Igneous Rock with Vesicle Infillings

Milky Quartz

Milky Quartz (Silicon Dioxide, SiO2)

Sandstone (likely Graywacke or Lithic Sandstone)

Arenite / Wacke (SiO2 based with lithic fragments)

Red Jasper

Silicon Dioxide (SiO2) with Iron Oxide inclusions

Red Sandstone

Sandstone (mainly SiO2 with Iron Oxide cement)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Red Sandstone

Arenite (with Iron Oxide / Hematite cementation)

River Siltstone / Mudstone Pebble

Siltstone (composed of mixed silicate and carbonate minerals)

Yellow Chert (Jasper)

Chalcedony (SiO2) with iron oxide inclusions

Quartzite (River Cobble)

Quartzite (SiO2)

Flint

Chert (a form of cryptocrystalline quartz, chemical formula SiO₂)

Red Jasper

Silicon Dioxide (SiO2) with Hematite (Fe2O3) inclusions

Amygdaloidal Basalt

Basalt with secondary mineral infilling (commonly Zeolite, Calcite, or Quartz)

Coquina

Bioclastic Limestone (composed primarily of CaCO3)