Mineral On Sedimentary Rock

Sandstone

Arenite (SiO2 based clastic rock)

Quartz Pebble

Silicon Dioxide (SiO2)

Shale fragment

Shale (Laminated Mudstone)

Sandstone nugget

Arenite (primarily Quartz SiO2)

Sandstone Pebble

Arenite (primarily SiO2)

Common Pebble / Sedimentary Rock Fragment

Lithified clastic sediment

Sandstone (Graywacke)

Clastic Sedimentary Rock (Lithic Sandstone)

Sandstone

Sandstone (SiO2 dominated)

Sandstone

Arenite (primarily SiO2)

Sandstone

Arenite (SiO2 primarily)

Sandstone

Arenite (SiO2 based)

Wishing Stone (Basalt/Siltstone with Quartz/Calcite vein)

Carbonaceous Siltstone with Quartz (SiO2) or Calcite (CaCO3) vein

Bumblebee Jasper

Anhydrous Calcium Carbonate with Sulfur and Arsenic (Orpiment/Realgar)

Sandstone (Quartz Sandstone)

Arenite (primarily SiO2)

Limonite (Iron Ore)

Goethite and related iron hydroxides (FeO(OH)·nH2O)

Fossil Coral

Rugose Coral or Tabulate Coral (Phylum Cnidaria)

Red jasper in gray host rock (likely hematite-stained quartzite or rhyolite)

Jasper: microcrystalline quartz (SiO₂), with iron-oxide coloration; exact host uncertain from image

Bauxite

Bauxite (Mixture of Hydrous Aluminum Oxides)

Dalmation Stone (often called Dalmatian Jasper)

Peralkaline Rock (Microgranite/Aplite), SiO2 with inclusions of Arfvedsonite

Fossil Shark Tooth

Selachii (fossilized dentition)

Mineral and Rock Collection (Assorted)

Mixed collection including Quartz (SiO2), Jasper (SiO2 with impurities), Rose Quartz, and Aventurine

Satin Spar Selenite

Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O

Satin Spar (Selenite)

Gypsum (CaSO4·2H2O)

Quartz (Chert/Chalcedony variety)

Silicon Dioxide (SiO2)

Fossilized Sea Urchin (Echinoid)

Echinoidea (Class) - likely replaced by Calcite or Quartz

Sandstone (likely Arkosic or Lithic Sandstone)

Clastic Sedimentary Rock (SiO2 with assorted minerals)

Limonite (Iron Ore)

Limonite (Hydrous iron(III) oxide-hydroxide mixture, primarily FeO(OH)·nH2O)

Sandstone

Arenite (primarily SiO2)

Sandstone

Arenite

Raw Calcite

Calcium Carbonate (CaCO3)

Grey Pebble (Sandstone / Quartzite Pebble)

Sedimentary rock (primarily Quartz - SiO2)

Sandstone (Quartzose Sandstone)

Clastic Sedimentary Rock (composed mostly of SiO2)

Desert Varnish on Sandstone

Ferromanganese coating on Quartz Arenite

Sandstone

Sandstone (composed predominantly of SiO2)

Cowrie Shell Fossil

Cypraea sp.

Sandstone

Arenite (SiO2 based with cement)

Sandstone

Arenite (Siliclastic sedimentary rock)

Banded Siltstone

Banded Siltstone / Laminated Siltstone

Sandstone (Quartzose)

Arenite (primarily SiO2)

Sandstone (with Chert/Quartzite nodules)

Clastic sedimentary rock (primarily SiO2)

Sandstone (Quartzose Sandstone)

Arenite (primarily SiO2)

Sandstone

Quartzose Sandstone (Sedimentary Rock)