Sandstone
Arenite (composed primarily of SiO2)
Category
Browse sedimentary (primary) with artificial modification specimens identified by the Rock Identifier community.
Sandstone
Arenite (composed primarily of SiO2)
Specular Hematite with Quartz and Limonite
Hematite (Fe2O3) with Quartz (SiO2) and Limonite (FeO(OH)·nH2O)
Chert (Nodule)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Synthetic Resin (Artificial Specimen)
Polyurethane or Polyester Resin
Pyrite
Iron Disulfide (FeS2)
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
Smoky Quartz
Silicon Dioxide (SiO2)
Smoky Quartz
SiO2 (Silicon Dioxide)
Granular Sandstone
Arenite (variable composition, primarily SiO2)
Sandstone (Greywacke/Siltstone variant)
Arenite / Wacke (SiO2 with diverse mineral inclusions)
Bauxite (Concretionary)
Bauxite (Al(OH)3, AlO(OH))
Goldstone
Not a natural mineral or rock. It is an ornamental glass.
Limonite (Ironstone)
Limonite (mixture of hydrated iron oxides, primarily Goethite α-FeO(OH))
Sandstone (Quartzite-rich)
Clastic sedimentary rock (SiO2 primary)
Glauconite
(K,Na)(Fe3+,Al,Mg)2(Si,Al)4O10(OH)2
Chert Pebble
Microcrystalline Quartz (SiO2)
Sandstone (likely Quartzose Sandstone)
Arenite (primarily SiO2)
Sandstone (Quartzite-rich River Cobble)
Clastic sedimentary rock (primarily SiO2)
Limestone
Calcium Carbonate (CaCO3)
Limestone
Calcium Carbonate (CaCO3)
Sandstone
Clastic sedimentary rock (primarily SiO2)
Sandstone
Arenite
Fluorite, Turquoise, and Calcite set
Calcium Fluoride (CaF2), Hydrous Phosphate of Copper and Aluminum (CuAl6(PO4)4(OH)8·4H2O), Calcium Carbonate (CaCO3)
Black Onyx
Onyx (Silicon Dioxide, SiO2)
Agate
Agate (Silicon Dioxide, SiO2)
Optical Calcite (Iceland Spar)
Calcite (Calcium Carbonate, CaCO3)
Bauxite
Bauxite (Mixture of Al(OH)3, AlO(OH), and Fe2O3)
Limestone (Weathered Aggregate)
Sedimentary Carbonate Rock (CaCO3)
Fossiliferous Limestone
Calcium Carbonate - CaCO3
Chert (Pebble)
Microcrystalline silica (SiO2)
Aura Quartz (Pink/Rose Aura Quartz)
Silicon Dioxide (SiO2) bonded with Platinum and/or Silver
Ferruginous Sandstone (River Pebble)
Clastic Sedimentary Rock (primarily SiO2 with Fe2O3 cement)
Quartz (Iron-stained or Milky)
Silicon Dioxide (SiO2)
Orange Calcite
Calcium Carbonate (CaCO3)
Botryoidal Goethite
Goethite (α-Fe3+O(OH))
Shale
Fissile Mudstone (primarily composed of phyllosilicate minerals like kaolinite, montmorillonite, and illite)
Chert (Jasper/Agate variety)
Microcrystalline Quartz (SiO2)
Sandstone (Ferruginous)
Arenite with Iron oxide staining (SiO2 with Fe2O3)
Sandstone
Arenite
Sandstone (Quartzose Sandstone)
Clastic Sedimentary Rock (primarily SiO2)
Limestone (Weathered)
Calcium Carbonate (CaCO3)
Bornite (Peacock Ore)
Bornite (Cu5FeS4)