Pyrite
Iron disulfide (FeS2)
mineral
Category
Mineral And Sedimentary
Browse mineral and sedimentary specimens identified by the Rock Identifier community.
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Dendritic Agate
Silicon Dioxide (SiO2) with inclusions of manganese or iron oxide
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Yellow Jasper
Silicon Dioxide (SiO2) with iron oxide impurities
mineral
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Rhodonite
Manganese Silicate (Mn,Fe,Mg,Ca)SiO3
Mineral
Pyrite
Iron Disulfide (FeS2)
mineral
Pyrite
Iron Disulfide (FeS2)
mineral
Banded Agate
Cryptocrystalline Quartz (SiO2)
mineral
Magnetite (Iron Ore)
Magnetite (Fe3O4)
mineral
Quartz (Small Fragment)
Silicon Dioxide (SiO2)
mineral
Quartz (Milky or White Quartz)
Silicon Dioxide (SiO2)
mineral
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Shale
Shale (clay-rich mudstone)
sedimentary
Banded Slate or Siltstone with Quartz/Calcite Veins
Protolith-derived Siltstone or Slate (varies based on degree of metamorphism)
metamorphic
Quartz (Milky or Druzy Quartz)
Silicon Dioxide (SiO2)
mineral
Sandstone
Arenite (primarily SiO2)
sedimentary
Sandstone (likely Quartzose Sandstone)
Arenite (primarily SiO2)
sedimentary
Sandstone (with Feldspathic/Arkose qualities)
Arenite (primarily SiO2 with KAlSi3O8 components)
sedimentary
Sandstone
Arenite (primarily SiO2 - Silicon Dioxide)
sedimentary
Sandstone (Ferruginous)
Arenite with Iron Oxide (Limonite/Hematite) coating
sedimentary
Sandstone
Arenite (Sedimentary rock composed of sand-sized minerals or rock grains)
sedimentary
White Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Sandstone (Quartzose Sandstone)
Clastic Sedimentary Rock (primarily SiO2)
sedimentary
Banded Sandstone (Differential Weathering)
Clastic Sedimentary Rock (primarily SiO2)
sedimentary
Siltstone Pebble
Siltstone (composed of microscopic quartz and clay minerals)
sedimentary
Coprolite
Coprolite (fossilized feces)
fossil
Potassium Feldspar (Orthoclase)
KAlSi3O8
mineral
Quartz-Veined Mudstone
Argillaceous Mudstone with Quartz Veining
sedimentary
Yellow Jasper
SiO2 (Silicon Dioxide)
sedimentary
Limonite (Iron Ore)
FeO(OH)·nH2O (Hydrous ferric oxide)
mineral
Quartz Geode
Silicon Dioxide (SiO2) within a sedimentary or volcanic shell
mineral
Fossiliferous Limestone
Biogenic Limestone (Calcium Carbonate, CaCO3)
sedimentary
Limestone (Concretionary or Tufa)
Calcium Carbonate (CaCO3)
sedimentary
Sandstone (likely Quartzite-rich)
Arenite (primarily SiO2)
sedimentary
Bumblebee Jasper (technically a type of Agate/Anhydrite)
Calcite and Anhydrite with inclusions of Realgar and Orpiment (As2S3)
sedimentary
Quartz Druzy Geode Fragment
Silicon Dioxide (SiO2)
mineral
Emerald / Green Beryl
Beryl (Be3Al2(SiO3)6) with Chromium/Vanadium impurities
mineral
Ocean Jasper
Orbicular Jasper/Microcrystalline Quartz (SiO2)
sedimentary
Yellow Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Sandstone (Greywacke/Lithic Sandstone)
Clastic Sedimentary Rock (Lithic Sandstone)
sedimentary
Sandstone (Quartzose Sandstone)
Clastic Sedimentary Rock (primarily SiO2)
sedimentary