Sandstone
Arenite (SiO2 based)
sedimentary
Category
Sedimentary (Processed Mineral Product)
Browse sedimentary (processed mineral product) specimens identified by the Rock Identifier community.
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Sandstone (with Concretion)
Arenite / Quartzose Sandstone
sedimentary
Limonite (Iron Ore)
Limonite (FeO(OH)·nH2O)
mineral
Wishing Stone with Quartz Vein
Hydrothermal Quartz Vein in Metasedimentary Matrix (primarily SiO2)
metamorphic
Cubic Zirconia (CZ)
Cubic Zirconium Dioxide (ZrO2)
mineral (synthetic)
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
metamorphic
Quartz (Engineered Stone Countertop)
Silicon Dioxide (SiO2) with polymer resins
Sedimentary-like (Industrial Composite)
Chert (or Flint)
Chert (cryptocrystalline quartz), SiO2
Sedimentary
Granite Cobble
Felsic Intrusive Igneous Rock (Granite)
igneous
Sandstone (Banded)
Clastic Sedimentary Rock (primarily SiO2)
sedimentary
Sandstone (Banded)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Sandstone
Arenite (general term for sandstone)
Sedimentary Rock
Quartz Sand Grain
Silicon Dioxide (SiO2)
mineral
Specular Hematite (Specularite)
Iron Oxide (Fe2O3)
mineral
Gold Nugget
Native Gold (Au)
mineral
Ruby (in costume jewelry context)
Corundum (Al2O3) with Chromium impurities
mineral
Ocean Jasper (Orbicular Jasper)
Silicon Dioxide (SiO2) - Variety of Chalcedony/Quartz
mineral
Quartz (Iron-stained or Ferruginous)
Silicon Dioxide (SiO2)
mineral
Quartz / Vein Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz Crystal (specifically a Double-Terminated variety)
Silicon Dioxide (SiO2) - Low Quartz
mineral
Red Jasper
Silicon Dioxide (SiO2) with Hematite (Fe2O3)
mineral
Sulfur (on Matrix)
Native Sulfur (S8)
mineral
Slate
Foliated Metamorphic Rock (composed primarily of silica and alumina with iron and magnesium)
metamorphic
Quartz Geode
Silicon Dioxide (SiO2) within a geode
mineral
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Satin Spar (Selenite)
Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O
mineral
Shale
Fissile Mudstone
sedimentary
Yooperlite
Fluorescent Sodalite-bearing Syenite
igneous
Fossilized Fish Skeleton in Matrix
Vertebrata (Class: Actinopterygii), typically found in limestone or shale matrices
sedimentary
Fossil Coral
Coral Limestone (a type of biogenic sedimentary rock)
Sedimentary
Sandstone (Ferruginous)
Sandstone (primarily SiO2 with Iron Oxide cement)
sedimentary
Sandstone
Arenite (Sedimentary rock composed of sand-sized grains, primarily SiO2)
sedimentary
Dendritic Agate or Manganese Nodule in Chert/Limestone
Silicon Dioxide (SiO2) with Manganese Oxide (MnO2) inclusions
sedimentary
Sandstone with Ironstone Concretion
Arenite with Hematite/Goethite nodules (Fe2O3 / FeO(OH))
sedimentary
Fossilized Bivalve Shell
Bivalvia (fossil specimen)
sedimentary
Geode (Unopened)
Silica-rich concretion (SiO2)
sedimentary
Serpentinite
Serpentinite (composed primarily of Serpentine group minerals: (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4)
metamorphic
Sandstone (Red Arkose)
Sandstone (Arkose variant, primarily SiO2 with KAlSi3O8)
sedimentary
Foliated Metamorphic Rock (likely Gneiss or Schist)
Gneissic Metamorphic Rock
metamorphic
Ferruginous Quartz
Silicon Dioxide (SiO2) with Hematite/Limonite impurities
mineral
River Rock (likely Siltstone or fine-grained Sandstone)
Clastic Sedimentary Rock
sedimentary