Galena
Lead(II) sulfide (PbS)
Category
Browse sedimentary (primary) with artificial modification specimens identified by the Rock Identifier community.
Galena
Lead(II) sulfide (PbS)
Gypsum (Wallboard/Drywall)
Calcium Sulfate Dihydrate (CaSO4·2H2O)
Chert (Jasper variation)
Microcrystalline Quartz (SiO2)
Chert (specifically Jasper/Flint)
Chert (SiO2)
Honey Calcite
Calcite (Calcium Carbonate, CaCO3)
Quartz Geode
Crystalline Quartz (Silicon Dioxide, SiO2)
Specular Hematite (Specularite)
Iron Oxide (Fe2O3)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Specular Hematite
Hematite (Fe2O3)
Banded Iron Formation (BIF) / Jasper-Magnetite
Banded Iron Formation (majorly Fe2O3/Fe3O4 + SiO2)
Bauxite
Bauxite (Al(OH)3, γ-AlO(OH), and α-AlO(OH))
Banded Iron Formation (Jaspillite)
Banded Iron Formation (BIF) / Jaspillite
Kaolinite (Chalky Clay)
Kaolinite (Al2Si2O5(OH)4)
Milky Quartz
Silicon Dioxide (SiO2)
Concrete with Exposed Aggregate
Anthropogenic conglomerate (Concrete)
Chert (Pink variety/Jasper)
Silicon Dioxide (SiO2)
Specular Hematite Geode/Nodule
Specularite (Polycrystalline Hematite), Fe2O3
Barite (Desert Rose or Cockscomb variety)
Barium Sulfate (BaSO4)
Hematite (Iron Ore)
Hematite (Fe2O3)
Jasper
Silicon Dioxide (SiO2) with iron oxide impurities
Ferruginous Sandstone (Ironstone)
Arenite with Iron-Oxide Cement (FeO(OH)·nH2O / Fe2O3)
Bumblebee Jasper
Fossiliferous Calcite containing Orpiment and Realgar
Fossiliferous Limestone
Calcite-rich Sedimentary Rock (CaCO3)
Specular Hematite
Hematite (Fe2O3)
Specular Hematite (Specularite)
Iron(III) oxide (Fe2O3)
Puddingstone
Polymictic Conglomerate
Echinoid Fossil (Commonly called a Sea Urchin or Heart Urchin)
Phylum Echinodermata, Class Echinoidea
Bauxite
Bauxite (Al(OH)3, AlO(OH))
Jasper (specifically Yellow or Picture Jasper)
Silicon Dioxide (SiO2) with iron oxide inclusions
Fossilized Bone Fragment
Permineralized Skeletal Element (Likely Vertebrate)
Anthracite Coal
Anthracite (Metamorphosed Coal)
Banded Iron Formation (BIF)
Banded Iron Formation (Magnetite-Hematite-Chert)
Magnetite (Iron Ore)
Magnetite (Fe3O4)
Amber
Succinite (a Fossilized Tree Resin); Chemical formula is approximately C10H16O
Chert (includes Flint & Jasper)
Chert (Siliceous sedimentary rock, chemical formula SiO2)
Chert (Jasper variety)
Microcrystalline quartz (SiO2)
Chert (Field Pebble)
Microcrystalline / Cryptocrystalline Quartz (SiO2)
Chert (specifically Blue Chert or Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Chert (Jasper/Quartzite river stone)
Microcrystalline Silicon Dioxide (SiO2)
Chert (varietal Flint)
Silicon Dioxide (SiO2)
Chert (often called Flint)
Microcrystalline Quartz (SiO2)
Chert / Flint
Microcrystalline or Cryptocrystalline Quartz (SiO2)