Citrine
SiO2 (Silicon Dioxide)
mineral
Category
Mineral And Sedimentary
Browse mineral and sedimentary specimens identified by the Rock Identifier community.
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Sandstone (with potential iron mineralization)
Arenite
sedimentary
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Quartz Geode
SiO2 (Silicon Dioxide)
sedimentary
Sulfur (on Matrix)
Native Sulfur (S8)
mineral
Pink Granite Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Fossilized Fish Skeleton in Matrix
Vertebrata (Class: Actinopterygii), typically found in limestone or shale matrices
sedimentary
Foliated Metamorphic Rock (likely Gneiss or Schist)
Gneissic Metamorphic Rock
metamorphic
Brecciated Chert
Sedimentary Chert (SiO2) with Calc-Silicate mineralization
sedimentary
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Raw Fluorite
Calcium Fluoride (CaF2)
mineral
Dendritic Agate or Manganese Nodule in Chert/Limestone
Silicon Dioxide (SiO2) with Manganese Oxide (MnO2) inclusions
sedimentary
Shale
Shale (fine-grained clastic sedimentary rock)
Sedimentary
Shale
Fissile Mudstone
sedimentary
River Rock (likely Siltstone or fine-grained Sandstone)
Clastic Sedimentary Rock
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Sandstone (Ferruginous)
Arenite with Iron Oxide cement
sedimentary
Quartz Geode
Silicon dioxide (SiO2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Druzy Quartz on Ironstone
Silicon Dioxide (SiO2) on Limonitic Ironstone
mineral
Devil's Toenail (Fossil Oyster)
Gryphaea arcuata (Calcium Carbonate, CaCO3)
sedimentary
Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary
Breciated Limestone with Calcite Veins
Sedimentary Breccia (CaCO3)
sedimentary
Spinosaurus fossil (permineralized bone)
Spinosaurus aegyptiacus (Calcium phosphate mineralized with silica/sediment)
sedimentary
Fluorite
Calcium Fluoride (CaF2)
mineral
Sandstone (with Iron Staining)
Arenite
sedimentary
Sandstone (with banding)
Arenite (primarily SiO2)
sedimentary
Pyrite Cubes in Matrix
Iron Disulfide (FeS2) in Host Matrix
mineral side rock
Limonite (often after Hematite or Goethite)
Limonite (FeO(OH)·nH2O)
mineral
Sandstone (Quartzite texture)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Sandstone (Micaceous)
Arenite (composed primarily of SiO2)
sedimentary
Banded Agate with Drusy Quartz
Cryptocrystalline Quartz (SiO2) with macrocrystalline Quartz
mineral
Sandstone (Ferruginous)
Arenite with Hematite cement (SiO2 + Fe2O3)
sedimentary
Collection of Minerals and Ores
Various (e.g., Uraninite (U3O8), Carbon (C), Native Gold (Au), Hematite (Fe2O3), Galena (PbS), etc.)
mineral
Sandstone (Greywacke)
Arenite / Greywacke Sandstone
sedimentary
Gossanous Sandstone (likely Terrestrial)
Arenite with Iron-Oxide inclusions
sedimentary
Sandstone
Arenite (SiO2 dominant)
sedimentary
Sandstone with Magnetite and Iron Staining
Clastic Sedimentary Rock (contains Fe3O4 and Limonite/Hematite)
sedimentary
Sandstone
Arenite (Sedimentary rock composed of sand-sized grains, primarily SiO2)
sedimentary