Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Category
Sedimentary (Processed Mineral Product)
Browse sedimentary (processed mineral product) specimens identified by the Rock Identifier community.
Sandstone
Arenite (SiO2 principal component)
sedimentary
Amber
Succinurite (C10H16O)
mineraloid
Spinosaurus fossil (permineralized bone)
Spinosaurus aegyptiacus (Calcium phosphate mineralized with silica/sediment)
sedimentary
Ironstone Concretion (Limonite/Goethite)
Ferruginous Sandstone or Limonite (FeO(OH)·nH2O)
sedimentary
Sandstone (Ferruginous)
Arenite (Fe-rich)
sedimentary
Quartzite Pebbles
Quartzite (SiO2)
metamorphic
Red Jasper
Silicon Dioxide with Hematite impurities (SiO2 + Fe2O3)
mineral
Sandstone (likely Siltstone)
Arenite or Siltstone (high SiO2 content)
sedimentary
Ocean Jasper
Orbicular Jasper (Silicon Dioxide, SiO2)
sedimentary
Native Copper (Penny specimen)
Native Copper (Cu)
mineral
Limonite (Iron Ore)
Limonite (Iron oxide-hydroxide mixture, FeO(OH)·nH2O)
mineral
Magnetite Sand (Black Sand)
Magnetite (Fe3O4)
mineral
Quartzite
Quartzite (primarily Silicon Dioxide, SiO2)
metamorphic
Sandstone (with Iron Staining)
Clastic sedimentary rock (SiO2 with Fe2O3 oxides)
sedimentary
Concrete with Exposed Aggregate
Anthropogenic conglomerate (Concrete)
man-made rock (sedimentary analogue)
Quartz Geode (with possible Manganese or Goethite coating)
Silicon Dioxide (SiO2)
mineral
Limonite Concretion
Limonite (Hydrated Iron Oxide) FeO(OH)·nH2O
sedimentary
Limonite (Iron Ore)
Goethite and related iron hydroxides (FeO(OH)·nH2O)
mineral
Red Quartzite
Quartzite (SiO2)
metamorphic
Sandstone (Calcareous or Ferruginous)
Clastic sedimentary rock (SiO2 with CaCO3 or Fe2O3 cement)
sedimentary
Serpentinite
Serpentinite (composed largely of serpentine group minerals including Antigorite, Lizardite, or Chrysotile)
metamorphic
Pyrite in Matrix (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Limonite Concretion (Ironstone)
Limonite (Hydrated Iron(III) Oxide-Hydroxide, FeO(OH)·nH2O)
sedimentary
Synthetic Costume Accessory (Non-Geological)
Polyester and Acrylic Fiber (Anthropogenic polymer)
Synthetic / Man-made textile
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Concrete with Aggregate
Artificial Conglomerate (Cement and Aggregate)
sedimentary
Yellow Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Sandstone (Quartzose)
Arenite (Siliciclastic sedimentary rock)
sedimentary
Sandstone
Arenite (Siliclastic Sedimentary Rock)
sedimentary
Serpentine
Serpentinite (composed mainly of Group Minerals Antigorite, Chrysotile, and Lizardite; Mg3Si2O5(OH)4)
metamorphic
Larimar
Blue Pectolite (NaCa2Si3O8(OH))
mineral
Sandstone
Sandstone (Sedimentary rock composed of silicate grains)
sedimentary
Sandstone with Concretions / Liesegang Rings
Arenite with iron oxide banding
sedimentary
Sunstone
Oligoclase (a plagioclase feldspar variant), (Na,Ca)(Al,Si)4O8
mineral
Moss Agate
Silicon Dioxide (SiO2) with inclusions of manganese or iron oxide
mineral
Native Silver
Silver (Ag)
mineral
Quartz
Silicon dioxide (SiO2)
Mineral
Quartzite
Quartzite (SiO2)
metamorphic
Specular Hematite
Hematite (Fe2O3)
mineral
Pyrite on Quartz matrix
Iron Disulfide (FeS2) on Silicon Dioxide (SiO2)
mineral
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2 with iron inclusions)
metamorphic