Quartz (Iron-stained Quartz)
Silicon Dioxide (SiO2)
mineral
Category
Mineral And Sedimentary
Browse mineral and sedimentary specimens identified by the Rock Identifier community.
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Quartz (Milky/Snow)
Silicon Dioxide (SiO2)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Howlite
Howlite (Ca2B5SiO9(OH)5)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Jasper or Agate
Silicon dioxide (SiO2)
Mineral
Fossil bone, possibly a large mammal long-bone fragment
Fossilized cortical bone; taxon indeterminate from the photograph
fossil
Shale or Siltstone
Fine-grained siliciclastic sedimentary rock
sedimentary
Magnetite (Lodestone variant potential)
Magnetite (Fe3O4)
mineral
Limonite (Iron Ore)
Limonite (FeO(OH)·nH2O)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Gypsum (Selenite sand)
Calcium sulfate dihydrate (CaSO4·2H2O)
mineral
Breccia
Breccia (Sedimentary Clastic Rock)
sedimentary
Quartz pebble
Silicon dioxide (SiO2)
sedimentary
Shale
Mudrock / Fissile Shale
sedimentary
Sandstone (Pebble)
Sandstone
sedimentary
Fossilized Bone
Petrified Bone / Biogenic Sedimentary
fossil
Limonite
FeO(OH)·nH2O
mineral
Soil with Mineral Detritus and Quartz Fragments
Regolith / Silicate Mineral Aggregate
sedimentary
Shale (sub-type: Carbonaceous Shale)
Lutaceous Sedimentary Rock
sedimentary
Agate
SiO2
mineral
Shark Tooth Fossil
Vertebrate fossilized tooth
fossil
Hematite
Hematite (Fe2O3)
mineral
Blue Apatite
Fluorapatite (Ca5(PO4)3(F,Cl,OH))
mineral
Magnetite (Iron Ore)
Magnetite (Fe3O4)
mineral
Shale (with Iron Staining)
Argillaceous mudstone / Shale
sedimentary
Sandstone (Ferruginous)
Arenite (Fe-oxide cemented)
sedimentary
Pyrite
Iron Sulfide (FeS2)
mineral
Limonite
FeO(OH)·nH2O (Hydrated iron oxide-hydroxide)
mineral
Sandstone (Ferruginous)
Arenite (with Goethite/Limonite cement)
sedimentary
Raw selenite (gypsum)
Gypsum, CaSO₄·2H₂O; translucent variety selenite
mineral
Limonite (often after Pyrite)
Limonite (FeO(OH)·nH2O)
mineral
Sandstone Pebble
Sedimentary Rock (Quartzose Sandstone)
sedimentary
Fluorite
Calcium fluoride (CaF2)
mineral
Sandstone
Clastic Sedimentary Rock
sedimentary
Sandstone
Clastic Sedimentary Rock
sedimentary
Red Sandstone Pebble
Sedimentary quartz sandstone
sedimentary
Shale
Argillaceous Sedimentary Rock
sedimentary
Sandstone (likely Arkosic)
Clastic Sedimentary Rock
sedimentary
Sandstone (likely Siltstone or fine-grained Sandstone)
Sedimentary Rock (Clastic)
sedimentary
Breccia
Sedimentary Breccia
sedimentary