Pyrite
Iron Sulfide (FeS2)
mineral
Category
Sedimentary Or Mineral
Browse sedimentary or mineral specimens identified by the Rock Identifier community.
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Agate (Chalcedony)
Silicon Dioxide (SiO2)
mineral
Optical Calcite (Iceland Spar)
Calcite (Calcium Carbonate, CaCO3)
mineral
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Limonite (Iron Stone/Goethite)
Limonite (mixture of hydrated iron oxides, primarily Goethite: α-FeO(OH))
mineral
Pyrite (Iron Pyrites)
Iron Sulfide (FeS2)
mineral
Sandstone (likely Quartzose Sandstone)
Arenite (primarily SiO2)
sedimentary
Sandstone (Quartz-rich)
Arenite
sedimentary
Sandstone with Iron Oxide Staining
Clastic sedimentary rock (primarily SiO2 with Fe2O3 staining)
sedimentary
Red Sandstone
Arenite (Ferruginous Sandstone)
sedimentary
Green Fluorite
Calcium Fluoride (CaF2)
mineral
Chert (often called Flint or Jasper)
Microcrystalline or cryptocrystalline Quartz (SiO2)
sedimentary
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Tumbled Agate (Carnelian/Sard)
Silicon Dioxide (SiO2)
mineral
Pyrite (Fool's Gold) in Matrix
Iron Disulfide (FeS2)
mineral
Pyrite
Iron Disulfide (FeS2)
mineral
Pyrite-bearing Rock
Iron Sulfide (FeS2)
mineral
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Gypsum (Satin Spar variety)
Calcium Sulfate Dihydrate (CaSO4·2H2O)
mineral
Agate Geode Slice
Silicon Dioxide (SiO2) with trace elements
sedimentary
Galena
Lead(II) sulfide (PbS)
mineral
Celestite (Celestine)
Strontium sulfate (SrSO4)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Ironstone Concretion (Nutstone)
Ironstone (with High Limonite/Hematite Content)
sedimentary
Zebra Jasper
Tektite variety of Silicon Dioxide (SiO2) with inclusions
sedimentary
Banded Calcite (often sold as Caribbean Calcite or Mexican Onyx)
Calcium Carbonate (CaCO3)
mineral
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Jasper
Silicon dioxide (SiO2)
Mineral / Sedimentary
Satin Spar (often marketed as Selenite)
Fibrous Gypsum (CaSO4·2H2O)
mineral
Yellow Quartz
SiO2 (Silicon Dioxide)
mineral
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Celestite (Celestine)
Strontium sulfate (SrSO4)
mineral
Pyrite
Iron Disulfide (FeS2)
mineral
Calcite
Calcite (Calcium Carbonate, CaCO3)
mineral
Pyrite in Matrix (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Quartz Geode (partially opened)
Silicon Dioxide (SiO2) with iron staining
mineral
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Pyrite (Iron Pyrites)
Iron Sulfide (FeS2)
mineral
Quartz Geode Fragment
Silicon Dioxide (SiO2)
mineral