Sedimentary Rock (Specifically A Chemical Sedimentary Rock, Or A Chert If Considered Purely Mineral Aggregate)

Gneiss (Metamorphic Rock)

Gneiss (variable mineral formula primarily containing Quartz, Feldspar, and Mica)

Conglomerate with Fossilized Shark Teeth

Clastic sedimentary rock (Conglomerate) containing Elasmobranchii remains

Sandstone

Arenite (primarily SiO2)

Ferruginous Quartz

Silicon Dioxide (SiO2) with Hematite/Limonite impurities

Biotite Schist with Garnet

Garnet-Biotite Schist

Turquoise

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

Herkimer Diamond (Quartz Crystal)

Silicon Dioxide (SiO2)

Jasper (likely Brecciated or Multi-colored)

Jasper (SiO2)

Porphyritic Basalt or Diabase with Plagioclase Phenocrysts

Porphyritic Basalt or Diabase; Mineral: Plagioclase Feldspar

Picture Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Banded Gneiss (with possible weathered sulfide or iron staining)

Gneiss, potentially with iron oxide/hydroxide staining (e.g., limonite) or weathered sulfides

River Stone (Granitic Gneiss)

Foliated Granitic Gneiss

Clear Quartz

Silicon Dioxide (SiO2)

Sandstone (Banded)

Clastic Sedimentary Rock (composed of SiO2, CaCO3, or Fe2O3 cement)

Ferruginous Sandstone (with possible Epidote/Chlorite coloring)

Sandstone (SiO2 dominated with Fe2O3 staining)

Sandstone (Ferruginous)

Sandstone (Clastic sedimentary rock, predominantly SiO2 with Fe2O3 cement)

Sandstone

Arenite (SiO2 based)

Quartz (Milky/Common)

Quartz (Silicon Dioxide, SiO2)

Sandstone

Sandstone (lithified sand)

Ironstone Concretion

Siderite or Limonite Concretion

Sandstone (with Iron Staining)

Clastic sedimentary rock (primarily SiO2 with Fe2O3 staining)

Sandstone (Weathered)

Arenite (primarily SiO2)

Red Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Quartzite in Conglomerate

Clastic Sedimentary Rock with Silicon Dioxide (SiO2) inclusions

Turquoise

Turquoise, CuAl6(PO4)4(OH)8·4H2O

Gneiss

Gneiss

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Limonite (Iron Ore)

Limonite; FeO(OH)·nH2O

Turquoise

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

Quartz (Chert/Chalcedony flake)

Silicon Dioxide (SiO2)

Banded Gneiss

Gneiss (Metamorphic Rock)

Sandstone (Ferruginous)

Arenite with Iron Oxide cement (SiO2 + Fe2O3)

Sandstone

Arenite (composed primarily of SiO2)

Turquoise

Turquoise - CuAl6(PO4)4(OH)8·4H2O

Red Quartz (Druzy)

Silicon Dioxide (SiO2) with Hematite inclusions

Sandstone (Quartzose Sandstone)

Arenite

Sandstone

Arenite (primarily SiO2)

Sandstone

Arenite (SiO2 with various cementing agents)

Sandstone

Clastic sedimentary rock (primarily SiO2)

Sandstone (Quartzose Sandstone)

Clastic sedimentary rock (primarily SiO2)

Yellow Jasper

Jasper (Silicon Dioxide, SiO2)

Limestone

Calcium Carbonate (CaCO3)