Hematite (Tumbled)
Iron(III) oxide (Fe2O3)
mineral
Category
Sedimentary Or Mineral
Browse sedimentary or mineral specimens identified by the Rock Identifier community.
Learn about Sedimentary Or Mineral in the encyclopedia
View all →
Selenite (Satin Spar)
Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O
mineral
Pyrite
Iron Disulfide (FeS2)
mineral
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Jasper
Cryptocrystalline Quartz (SiO2)
sedimentary
Carnelian
SiO2 (Silicon Dioxide), a variety of Chalcedony
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Pyrite
Iron Pyrite (FeS2)
mineral
Marble
Metamorphosed Limestone (calcite formulation CaCO3)
metamorphic
Pyrite (on host rock/ore)
Iron Sulfide (FeS2)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Green Calcite
Calcium Carbonate (CaCO3)
mineral
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Agate (Chert/Chalcedony)
Silicon Dioxide (SiO2)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Satin Spar Selenite
Gypsum (Calcium Sulfate Dihydrate, CaSO4·2H2O)
mineral
Mica Schist
Mica Schist (predominantly Muscovite or Biotite sheet silicates)
metamorphic
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Plume Agate
Silicon Dioxide (SiO2)
mineral
Selenite (Satin Spar Gypsum)
Calcium Sulfate Dihydrate (CaSO4·2H2O)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Pyrite (Fool's Gold) Ore
Iron Disulfide (FeS2)
mineral
Yellow Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
Carnelian Agate
Silicon Dioxide (SiO2) with iron oxide impurities
mineral
Pyrite
Pyrite (Iron Disulfide), FeS2
Mineral
Magnetite / Hematite rich ore
Magnetite (Fe3O4) or Hematite (Fe2O3)
mineral
Geode (Unopened)
Silica Concretion / Geode (Formula: SiO2 for quartz internal contents)
sedimentary
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Banded Agate
Cryptocrystalline variety of Quartz (SiO2)
sedimentary
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Chert (Pink and Yellow Chert)
Microcrystalline Quartz (SiO2)
sedimentary
Sandstone
Arenite (SiO2 primarily)
sedimentary
Picture Jasper
Silicon Dioxide (SiO2) with mineral inclusions
sedimentary
Fancy Jasper
Silicon Dioxide (SiO2) with mineral inclusions
sedimentary
Tumbled Green Jasper
Silicon Dioxide (SiO2) with mineral inclusions
sedimentary
Picture Jasper
Silicon Dioxide (SiO2) with mineral inclusions
sedimentary
Sandstone (likely Siltstone variety)
Arenite / Siltstone (primary mineral SiO2)
sedimentary
Chert (Serpentinized)
Silicon Dioxide (SiO2) with mineral staining
sedimentary