Sodalite
Sodium Aluminum Silicate Chloride (Na8Al6Si6O24Cl2)
mineral
Category
Sedimentary (With Some Aspects Of Mineral Replacement)
Browse sedimentary (with some aspects of mineral replacement) specimens identified by the Rock Identifier community.
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Fossilized Bone
Permineralized Vertebrate Bone
fossil
Magnetite / Lodestone
Magnetite (Fe3O4)
mineral
Baryte (Barite)
Barium sulfate (BaSO4)
mineral
Likely galena-bearing ore
Galena (PbS), possibly mixed with quartz or carbonate gangue
mineral
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Fossilized Fish (Lepidotes)
Lepidotes sp. (Order: Lepisosteiformes)
sedimentary
Pyrite
Iron Disulfide (FeS2)
mineral
Pyrite
Iron Pyrite (FeS2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Botryoidal chalcedony (possibly agate/geode material)
Microcrystalline quartz, SiO₂; commonly intergrown with calcite and iron oxides
mineral
Fossil Coral
Scleractinia (Fossilized Hexacoral)
fossil
Fossilized Gastropod / Coral
Phylum Mollusca / Cnidaria (Silicified or Calcified)
fossil
Galena
Lead Sulfide (PbS)
mineral
Agatized Dinosaur Bone
Permineralized Dinosaur Bone (Silicified/Agatized Bone)
fossil
Pyrite
Iron Sulfide (FeS2)
mineral
Jasper
SiO2 (Cryptocrystalline quartz)
mineral
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
mineral
Mineral and Rock Collection (Assorted)
Mixed collection including Quartz (SiO2), Jasper (SiO2 with impurities), Rose Quartz, and Aventurine
mineral
Galena
Lead(II) sulfide (PbS)
mineral
Tumbled picture jasper
Microcrystalline quartz (SiO₂), commonly with iron-oxide and clay inclusions
mineral
Chert
Silicon dioxide (SiO2)
sedimentary
Brachiopod Fossil in Matrix
Phylum Brachiopoda
fossil
Specular Hematite
Hematite (Iron(III) oxide, Fe2O3)
mineral
Fossil Snail
Gastropoda (fossilized)
fossil
Metallic sulfide ore, likely galena-bearing rock
Galena (lead sulfide, PbS), possibly with pyrite or other sulfides
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Cowrie Shell Fossil
Cypraea sp.
fossil
Pyrite and Calcite (or Barite) Specimen
Iron Sulfide (FeS2) with Calcium Carbonate (CaCO3)
mineral
Petrified Wood
Silicified Wood (primarily SiO2)
fossil
Rhodonite
Manganese Inosilicate (Mn,Fe,Mg,Ca)SiO3
mineral
Pyrite (on host rock)
Iron Sulfide (FeS2)
mineral
Ammonite Fossil
Ammonoidea subclass (calcium carbonate / silica replacement)
fossil
Poppy Jasper
Microcrystalline Quartz (SiO2) with mineral inclusions
sedimentary
Fossilized Coral (Honeycomb Coral)
Favosites (extinct genus of tabulate corals), CaCO3 (Calcium Carbonate)
sedimentary
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Gastropod Steinkern (Fossilized Snail Cast)
Phylum Mollusca, Class Gastropoda (Commonly CaCO3 or SiO2 after replacement)
Sedimentary
Galena
Galena (lead sulfide, PbS)
mineral
Fossilized Tooth Fragment
Vertebrate Fossil (Mammalia indet.)
fossil
Chert
Microcrystalline Quartz (SiO2)
sedimentary