Anthropogenic Sedimentary (Man Made)

Conglomerate

Conglomerate (Clastic Sedimentary Rock)

Sandstone

Arenite (Siliclastic sedimentary rock)

Coal (likely Bituminous or Lignite)

Organic Sedimentary Rock (Carbonaceous)

Oolitic Limestone

Oolite (Sedimentary Calcium Carbonate)

Conglomerate

Clastic sedimentary rock (Conglomerate)

Conglomerate

Conglomerate (Detrital sedimentary rock)

Limestone (Porous/Travertine variant)

Sedimentary Calcium Carbonate (CaCO3)

Chert (specifically a stream-worn Chert Nodule)

Sedimentary Cryptocrystalline Quartz (SiO2)

Oolitic Limestone

Oolite (Sedimentary Calcium Carbonate)

Limestone

Sedimentary Calcium Carbonate (CaCO3)

Conglomerate

Conglomerate (clastic sedimentary rock)

Travertine (Tufa)

Terrestrial Sedimentary Limestone (CaCO3)

Flint / Chert

Silicon dioxide (SiO2)

Quartz

Quartz (SiO₂)

Chert (Jasper variation)

Silicon Dioxide (SiO2)

Red Jasper (Banded Jasper)

Jasper (Silicon Dioxide, SiO2)

Chert (Chalcedony/Agate)

Microcrystalline Quartz (SiO2)

Collection of Minerals and Ores

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

Shale or Argillite

Shale (fine-grained clastic sedimentary rock) or Argillite (low-grade metamorphic rock derived from shale)

Turquoise

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

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Sandstone

Arenite (SiO2 based)

Hematite

Iron(III) oxide (Fe2O3)

Sandstone

Arenite (primarily SiO2 with trace Fe2O3)

Limestone

Calcium Carbonate (CaCO3)

Chert / Red Jasper

Microcrystalline Quartz (SiO2)

Glauconite

(K,Na)(Fe3+,Al,Mg)2(Si,Al)4O10(OH)2

Chert (Jasper variety)

Microcrystalline Quartz (SiO2)

Limonite Sandstone

Ferruginous Sandstone (Hydrated Iron Oxide)

Yellow Chalcedony (Agate)

Silicon Dioxide (SiO2)

Yellow Calcite

Calcium Carbonate (CaCO3)

Blue Chalcedony

Silicon Dioxide (SiO2)

Chert (Nodule)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Quartz Geode

Silicon Dioxide (SiO2)

Howlite

Calcium borosilicate hydroxide (Ca2B5SiO9(OH)5)

Satin Spar (often sold as Selenite)

Gypsum (CaSO4·2H2O)

Blue Celestite (Celestine)

Strontium sulfate (SrSO4)

Quartz Crystal Fragment

Silicon Dioxide (SiO2)

Satin Spar (Gypsum)

Hydrous Calcium Sulfate (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)

Zoisite with Ruby

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