Sedimentary Like (Industrial Composite)

Quartz Geode Fragment

Silicon Dioxide (SiO2)

Bauxite

Hydrated Aluminum Oxides (primarily Gibbsite Al(OH)3, Boehmite γ-AlO(OH), and Diaspore α-AlO(OH))

Pink Satin Spar (Satin Spar Selenite Dyed)

Gypsum (CaSO4·2H2O)

Limonite (Iron Ore)

FeO(OH)·nH2O (Hydrous ferric oxide)

Limestone

Calcium Carbonate (CaCO3)

Dyed Agate Slice

Silicon Dioxide (SiO2) with artificial colorants

Chalcedony (specifically Agate or Common Opal variety)

Cryptocrystalline Silica (SiO2)

Quartz Druzy (Geode Fragment)

Silicon Dioxide (SiO2)

Sandstone (lithic wacke)

Arenite / Lithic Wacke (mostly SiO2 with rock fragments)

Oolitic Ironstone

Sedimentary Ooidal Ironstone (Limonite/Hematite mixture)

Quartz Crystal with Inclusions

Silicon Dioxide (SiO2)

Chert (Gravel Fragment)

Silicon dioxide (SiO2)

Agate

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Mudstone

Lutylite (group of fine-grained sedimentary rocks)

Chert (often called Flint or Jasper)

Silicon Dioxide (SiO2)

Quartz pebble

Silicon dioxide (SiO2)

Red Jasper

Silicon Dioxide (SiO2) containing Iron Oxide inclusions

Limestone

Calcium Carbonate (CaCO3)

Ironstone Concretion / Hematite Nodules

Ferruginous Sedimentary Rock (primarily Hematite Fe2O3 and Goethite FeO(OH))

Yellow Calcite

Calcium Carbonate (CaCO3)

Kyanite in Quartz

Kyanite (Al2SiO5) with Quartz (SiO2)

Desert Rose (Gypsum Variety)

Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O

Clear Quartz Crystal

Quartz (Silicon Dioxide, SiO2)

Garnet in Schist (Polished Tower)

Almandine Garnet (Fe3Al2(SiO4)3) in Mica Schist

Chert (with Limestone/Carbonate matrix)

Sedimentary cryptocrystalline silica (SiO2)

Chert (specifically Red Chert or Jasper)

Microcrystalline Quartz (SiO2)

Green Calcite

Calcium Carbonate (CaCO3)

Chert (Nodule)

Microcrystalline Quartz (SiO2)

Kyanite in Quartz

Al2SiO5 in SiO2

Asphalt (Bituminous Slate/Sandstone)

Asphaltum / Bituminous Rock

Fossilized Oyster Shell

Gryphaea or Crassostrea fossil (Calcium Carbonate, CaCO3)

Chert (Flint variety)

Silicon Dioxide (SiO2)

Chert (Red Jasper)

Microcrystalline Quartz (SiO2)

Chert (Jasper/Mudstone variant)

Silicon Dioxide (SiO2)

Conglomerate

Conglomerate (Clastic sedimentary rock)

Ferruginous Sandstone

Arenite with Iron-Oxide Cement (SiO2 with Fe2O3/FeO(OH))

Chert / Jasper

Silicon Dioxide (SiO2)

Chert (with Manganese Dendrites)

Chert (Cryptocrystalline Quartz, SiO2)

Sandstone Cobble

Arenite (predominantly Quartz Sandstone)

Limestone (containing Fossil Mold)

Sedimentary Calcium Carbonate (CaCO3)

Synthetic Zinc/Polycarbonate Composite (Bey-specimen)

Zinc Alloy (Zamak 3) with Polycarbonate (C15H16O2)n Overlay

Orange Calcite

Calcium Carbonate (CaCO3)