Mineral On Sedimentary Rock

Sandstone

Arenite (SiO2 based clastic rock)

Shale fragment

Shale (Laminated Mudstone)

Quartz Pebble

Silicon Dioxide (SiO2)

Common Pebble / Sedimentary Rock Fragment

Lithified clastic sediment

Sandstone nugget

Arenite (primarily Quartz SiO2)

Sandstone Pebble

Arenite (primarily SiO2)

Sandstone (Graywacke)

Clastic Sedimentary Rock (Lithic Sandstone)

Sandstone

Sandstone (SiO2 dominated)

Sandstone

Arenite (primarily SiO2)

Sandstone

Arenite (SiO2 primarily)

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

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

Sandstone

Arenite (SiO2 based)

Bumblebee Jasper

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

Limonite (Iron Ore)

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

Sandstone (Quartz Sandstone)

Arenite (primarily SiO2)

Fossil Coral

Rugose Coral or Tabulate Coral (Phylum Cnidaria)

Bauxite

Bauxite (Mixture of Hydrous Aluminum Oxides)

Dalmation Stone (often called Dalmatian Jasper)

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

Mineral and Rock Collection (Assorted)

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

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

Fossil Shark Tooth

Selachii (fossilized dentition)

Sandstone (likely Arkosic or Lithic Sandstone)

Clastic Sedimentary Rock (SiO2 with assorted minerals)

Satin Spar Selenite

Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O

Satin Spar (Selenite)

Gypsum (CaSO4·2H2O)

Quartz (Chert/Chalcedony variety)

Silicon Dioxide (SiO2)

Limonite (Iron Ore)

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

Sandstone

Arenite (primarily SiO2)

Sandstone

Arenite

Fossilized Sea Urchin (Echinoid)

Echinoidea (Class) - likely replaced by Calcite or Quartz

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)

Sandstone

Sandstone (composed predominantly of SiO2)

Cowrie Shell Fossil

Cypraea sp.

Desert Varnish on Sandstone

Ferromanganese coating on Quartz Arenite

Sandstone

Arenite (SiO2 based with cement)

Sandstone

Arenite (Siliclastic sedimentary rock)

Sandstone (Quartzose)

Arenite (primarily SiO2)

Banded Siltstone

Banded Siltstone / Laminated Siltstone

Sandstone (with Chert/Quartzite nodules)

Clastic sedimentary rock (primarily SiO2)

Sandstone (Quartzose Sandstone)

Arenite (primarily SiO2)

Sandstone

Quartzose Sandstone (Sedimentary Rock)