Sedimentary Rock (Possibly Conglomerate Or Breccia With A Quartz Vein)

Black Limestone with Calcite Veining

Bituminous Limestone (CaCO3 with Organic Carbon inclusions)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Sandstone

Arenite

Milky Quartz with Iron Inclusions

Silicon Dioxide (SiO2)

Quartz Geode

Silicon Dioxide (SiO2) in Geode form

Banded Gneiss

Gneiss (high-grade metamorphic silicate rock)

Ferruginous Sandstone with Quartz Inclusions

Clastic Sedimentary Rock (Iron-rich Sandstone)

Clear Quartz

Silicon Dioxide (SiO2)

Clear Quartz

Quartz (Silicon Dioxide, SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Quartz Druse (on Chalcedony/Agate base)

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Quartz / Quartzite

Silicon Dioxide (SiO2)

Blue Chalcedony

Cryptocrystalline Quartz (SiO2)

Marble

Marbles are primarily composed of calcite (calcium carbonate, CaCO3) or dolomite (calcium magnesium carbonate, CaMg(CO3)2).

Sandstone Concretion

Clastic sedimentary rock (primarily Quartz SiO2)

Kambaba Jasper (Crocodile Jasper)

Stromatolitic Rhyolite/Jasper (SiO2)

Quartz

Silicon dioxide (SiO₂)

Green Aventurine and Clear Quartz

Green Aventurine (Silicon Dioxide - SiO2 with Fuchsite inclusions); Clear Quartz (Silicon Dioxide - SiO2)

Chert

Microcrystalline Quartz (SiO2)

Chert (Flint)

Cryptocrystalline Quartz (SiO2)

Clear Quartz

Silicon Dioxide (SiO2)

Fuchsite Quartzite

Fuchsite-bearing Quartzite

Milky Quartz with Iron Inclusions

Quartz (Silicon Dioxide, SiO2)

Sandstone (likely Arkose or Quartz Sandstone)

Arenite (SiO2 + varied clasts)

Quartz (Milky and Smoky variety)

Silicon Dioxide (SiO2)

Sandstone (Quartzite Pebble)

Arenite (SiO2)

Quartz Geode

Silicon Dioxide (SiO2)

Druzy Quartz

Silicon Dioxide (SiO2)

Quartz (Druzy)

Silicon Dioxide (SiO2)

Quartz Druzy (on Matrix)

Silicon Dioxide (SiO2)

Red Sandstone

Sandstone (principally Quartz with Iron Oxide coating)

Turquoise

Turquoise (CuAl6(PO4)4(OH)8·4H2O)

Milky Quartz

Silicon Dioxide (SiO2)

Sandstone Concretion

Sedimentary concretion

Pebble (likely Sandstone or Granitic Pebble)

Clastic Sediment (or specific rock type, e.g., Arenite, Granitoid Pebble)

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Quartz Geode

Silicon Dioxide (SiO2)

Sandstone

Arenite (a specific type of sandstone with less than 15% matrix)

Sandstone (Banded)

Clastic Sedimentary Rock (primarily Quartz, SiO2)

Agate

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Basalt with Quartz Veins

Basalt (composition: SiO2, MgO, FeO, Al2O3, CaO)