Sandstone
Arenite (composed mainly of SiO2)
Category
Browse anthropogenic (man made material mimicking sedimentary rock) specimens identified by the Rock Identifier community.
Sandstone
Arenite (composed mainly of SiO2)
Sandstone (likely Arkose)
Arenite (Feldspathic Sandstone / Arkose)
Red Sandstone
Arenite (with Iron Oxide / Hematite staining)
Chert / Flint (a variety of Chert)
Chert (SiO2)
Blue Apatite
Apatite (Group), Ca5(PO4)3(F,Cl,OH)
Orange Calcite
Calcite (CaCO3)
Flint (within Limestone matrix)
Silicon dioxide (SiO2)
Banded Iron Formation
Banded Iron Formation (BIF)
Limestone (specifically a Crushed Aggregate fragment)
Calcium Carbonate (CaCO3)
Sandstone (lithic wacke/arenite)
Clastic sedimentary rock (primarily SiO2)
Kaolinite (Chalky Clay)
Kaolinite (Al2Si2O5(OH)4)
Limonite (Iron Ore)
FeO(OH)·nH2O (Hydrous ferric oxide)
Mixed Gemstone Beaded Jewelry
Various minerals (e.g., Quartz varieties like Rose Quartz, Amethyst; Peridot; Garnet; etc.)
Sandstone (lithic/greywacke variant)
Clastic sedimentary rock (primarily SiO2 with rock fragments)
Granite (Pegmatitic)
Phaneritic Felsic Igneous Rock
Jasper
Jasper (Silica-rich microcrystalline Quartz, SiO2 with Fe2O3 impurities)
Diamond in Kimberlite
Diamond (C in Kimberlite Matrix)
Sandstone (River Pebble)
Arenite (primarily SiO2)
Fossiliferous Limestone
Fossiliferous Limestone (CaCO3)
Sandstone (Quartzose)
Arenite (primarily SiO2)
Green Moss Agate
Silicon Dioxide with inclusions (SiO2)
Limonite with Trace Fossils
Hydrous Iron Oxide Mixture (FeO(OH)·nH2O)
Pink Granite
Phaneritic Felsic Igneous Rock (Granite, rich in Potassium Feldspar)
Fluorite
Calcium Fluoride (CaF2)
Pink Rhodonite
Manganese Silicate (MnSiO3)
Sandstone (likely Arkose or Quartz Sandstone)
Arenite (SiO2 + varied clasts)
Sandstone (specifically Flagstone)
Arenite (primarily composed of SiO2)
Silty Sand / Loam
Unconsolidated Clastic Sediment (Silicon Dioxide / Alumino-silicates mixture)
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
Pearl (with Peridot)
Calcium carbonate (CaCO3) + Conchiolin; Peridot: Magnesium iron silicate (Mg, Fe)2SiO4
Sandstone
Arenite (primarily SiO2)
Sandstone (Quartzose)
Arenite (Siliciclastic sedimentary rock)
Sandstone with Algae Growth
Arenite with Chlorophyta/Lichen
Pyrite
Iron Sulfide (FeS2)
Sandstone (Quartzite-rich)
Clastic Sedimentary Rock (primarily SiO2)
Sandstone (Quartzite-rich River Cobble)
Clastic sedimentary rock (primarily SiO2)
Sandstone
Clastic sedimentary rock (primarily SiO2)
Sandstone
Arenite (SiO2 based)
Green Kyanite
Kyanite (Al2SiO5)
Sandstone
Arenite (Siliclastic sedimentary rock)
Sandstone (Pebble)
Arenite (composed primarily of SiO2)
Fluorite (Polished Point/Tower)
Calcium Fluoride (CaF2)