Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Category
Sedimentary (Base), Then Artificial
Browse sedimentary (base), then artificial specimens identified by the Rock Identifier community.
Blue Chalcedony
Silicon Dioxide (SiO2)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Flint / Chert
Silicon dioxide (SiO2)
sedimentary
Rhodonite (in matrix)
Rhodonite (Mn,Fe,Mg,Ca)SiO3
Mineral
Carnelian
Carnelian (Silicon Dioxide - SiO2)
mineral
Almandine Garnet in Matrix
Almandine, Fe3Al2(SiO4)3
metamorphic
Hematite
Hematite, Iron(III) oxide (Fe2O3)
mineral
Limonite (Iron Ore)
Hydrated Iron(III) Oxide-Hydroxide (FeO(OH)·nH2O)
mineral
General Rock and Mineral Collection (Center: Angelite / Blue Anhydrite)
Anhydrite (Calcium Sulfate, CaSO4)
Mineral
Halite (Rock Salt)
Halite (Sodium Chloride, NaCl)
mineral
Chert (Nodule)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Blue Apatite
Apatite (Group), Ca5(PO4)3(F,Cl,OH)
mineral
Agate
Banded Chalcedony (SiO2)
mineral
Gneiss
Gneiss
metamorphic
Limonite (Iron Ore)
FeO(OH)·nH2O (Hydrated iron(III) oxide-hydroxide mixture)
mineral
Quartz Crystal Fragment
Silicon Dioxide (SiO2)
mineral
Blue Chalcedony (likely dyed Agate)
Silicon Dioxide (SiO₂)
mineral
Orthoclase Feldspar
Orthoclase (KAlSi3O8)
mineral
Note: Image shows a biological specimen (Rat), not a rock. Representative geological equivalent: Galena (due to lead-grey colors in fur).
Galena (PbS)
mineral
Satin Spar (Gypsum)
Hydrous Calcium Sulfate (CaSO4·2H2O)
mineral
Red Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Marble
Recrystallized Calcite (CaCO3)
metamorphic
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Rhodonite
Manganese Silicate (Mn,Fe,Mg,Ca)SiO3
mineral
Grey Chalcedony (Tumbled Moon)
Microcrystalline Quartz (SiO2)
mineral
Halite (Rock Salt)
Halite (Sodium Chloride, NaCl)
mineral
Magnetite
Iron(II,III) oxide (Fe3O4)
mineral
Jasper or Chalcedony
Microcrystalline Quartz (SiO2)
sedimentary
Flint (Chert)
Silicon Dioxide (SiO2)
sedimentary
Claystone Concretion
Septarian Concretion (Ironstone-rich)
sedimentary
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Flint)
Chert (SiO2)
sedimentary
Banded Chert
Silicon Dioxide (SiO2)
sedimentary
Chert (Siltstone-Chert mixture)
Microcrystalline Quartz (SiO2)
sedimentary
Sandstone
Arenite
sedimentary
Sandstone
Arenite (SiO2 principal)
sedimentary
Chert / Jasper
Silicon Dioxide (SiO2)
sedimentary
Sandstone (Pebble)
Arenite (primarily SiO2)
sedimentary
Sandstone
Arenite (SiO2 primarily)
sedimentary
Sandstone
Arenite (composed primarily of SiO2)
sedimentary