Sedimentary (Fossilized Organic Remain)

Conglomerate

Conglomerate (clastic sedimentary rock)

Conglomerate

Conglomerate (Clastic sedimentary rock)

Conglomerate

Clastic Sedimentary Rock (Conglomerate)

Conglomerate

Conglomerate (Clastic sedimentary rock)

Conglomerate

Conglomerate (Clastic Sedimentary Rock)

Sandstone

Arenite (Siliclastic sedimentary rock)

Limestone

Calcareous Sedimentary Rock (CaCO3)

Oolitic Limestone

Oolite (Sedimentary Calcium Carbonate)

Limestone (with Iron-Oxide staining)

Sedimentary Calcium Carbonate (CaCO3)

Limestone

Sedimentary Calcium Carbonate (CaCO3)

Conglomerate

Clastic sedimentary rock (Conglomerate)

Conglomerate

Conglomerate (Detrital sedimentary rock)

Conglomerate

Conglomerate (clastic sedimentary rock)

Travertine (Tufa)

Terrestrial Sedimentary Limestone (CaCO3)

Limestone

Sedimentary Calcium Carbonate (CaCO3)

Oolitic Limestone

Oolite (Sedimentary Calcium Carbonate)

Red Sandstone Pebble

Arenite (primarily Quartz SiO2 with Hematite Fe2O3 staining)

Sandstone (likely Arkosic or Quartzose)

Arenite (SiO2 based with mineral inclusions)

Sandstone (likely Graywacke or Arkosic varieties)

Arenite (composed primarily of SiO2)

Ruby in Kyanite

Al2O3 (Corundum) in Al2SiO5 (Kyanite-Fuchsite-Quartz)

Collection of Minerals and Ores

Various (e.g., Uraninite (U3O8), Carbon (C), Native Gold (Au), Hematite (Fe2O3), Galena (PbS), etc.)

Chert (often referred to as Flint or Jasper when pigmented)

Microcrystalline or cryptocrystalline Quartz (SiO2)

Mookaite Jasper

Radiolarite (Chert/Jasper variety), formula SiO2

Chert (with Fossiliferous Silicification)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Chert (Gravel)

Chert (Cryptocrystalline silicon dioxide, SiO2)

Yellow Chalcedony (Agate)

Silicon Dioxide (SiO2)

Yellow Calcite

Calcium Carbonate (CaCO3)

Blue Chalcedony

Silicon Dioxide (SiO2)

Howlite

Calcium borosilicate hydroxide (Ca2B5SiO9(OH)5)

Chert (Nodule)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Quartz Geode

Silicon Dioxide (SiO2)

Blue Celestite (Celestine)

Strontium sulfate (SrSO4)

Quartz Crystal Fragment

Silicon Dioxide (SiO2)

Satin Spar (often sold as Selenite)

Gypsum (CaSO4·2H2O)

Garnet (specifically Almandine)

Almandine - Fe3Al2(SiO4)3

Note: Image shows a biological specimen (Rat), not a rock. Representative geological equivalent: Galena (due to lead-grey colors in fur).

Galena (PbS)

Satin Spar (Gypsum)

Hydrous Calcium Sulfate (CaSO4·2H2O)

Zoisite with Ruby

Anyolite (Calcium aluminum hydroxy silicate with Corundum) Ca2Al3(SiO4)3(OH)

Sandstone

Arenite (SiO2 based)

Sandstone

Arenite (primarily SiO2)

Sandstone

Clastic sedimentary rock (primarily SiO2)

Chert / Red Jasper

Microcrystalline Quartz (SiO2)