Sandstone (Greywacke)
Arenite / Clastic Sedimentary Rock
Category
Browse sedimentary (jasper), mineral (aquamarine) specimens identified by the Rock Identifier community.
Sandstone (Greywacke)
Arenite / Clastic Sedimentary Rock
Sandstone
Clastic Sedimentary Rock (composed primarily of Quartz: SiO2)
Sandstone (Quartzose Pebble)
Clastic Sedimentary Rock (Litharenite/Quartz arenite)
Halite
Halite (Sodium Chloride, NaCl)
Quartz on Host Rock
Silicon Dioxide (SiO2)
Pyrite
Iron Sulfide (FeS2)
Quartz Geode
Silicon Dioxide (SiO2)
Fluorite
Fluoride (Calcium Fluoride - CaF2)
Carnelian Agate
Silicon Dioxide (SiO2)
Blue Calcite
Calcium Carbonate (CaCO3)
Geode (unopened nodule)
Silicon Dioxide (SiO2) Nodule
Yellow Calcite
Calcium Carbonate (CaCO3)
Calcite
Calcium Carbonate (CaCO3)
Quartz Geode Fragment
Silicon Dioxide (SiO2)
Hematite
Iron(III) oxide (Fe2O3)
Pyrite (Iron Pyrites)
Iron Sulfide (FeS2)
Optical Calcite (Iceland Spar)
Calcite (Calcium Carbonate, CaCO3)
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
Limonite (Iron Stone/Goethite)
Limonite (mixture of hydrated iron oxides, primarily Goethite: α-FeO(OH))
Pyrite
Iron Sulfide (FeS2)
Pyrite
Iron Disulfide (FeS2)
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
Hematite (Oolitic or Earthy variety)
Iron(III) oxide (Fe2O3)
Rhodonite (in matrix)
Rhodonite (Mn,Fe,Mg,Ca)SiO3
Quartz Geode Fragment
Silicon Dioxide (SiO2)
Rhodonite
Manganese Silicate (Mn,Fe,Mg,Ca)SiO3
Limonite (Iron Ore Congcretion)
Limonite (a mixture of hydrated iron(III) oxide-hydroxides, FeO(OH)·nH2O)
Botryoidal Hematite (included in Quartz/Limonite matrix)
Fe2O3 (Hematite) on Quartz (SiO2) / Limonite
Sandstone
Arenite
Milky Quartz
Silicon Dioxide (SiO2)
Chalcedony (Botryoidal Agate vein)
Chalcedony (Microcrystalline Quartz) - SiO2
Banded Chert
Cryptocrystalline Quartz (SiO2)
Sandstone (Ferruginous)
Arenite with Iron Oxide matrix
Sandstone (with Iron Staining)
Clastic Sedimentary Rock (primarily Quartz with Fe2O3 staining)
Sandstone (likely Graywacke or Arkosic varieties)
Arenite (composed primarily of SiO2)
Sandstone
Arenite (primarily SiO2)
Sandstone (likely Graywacke or Arkose variant)
Clastic Sedimentary Rock (SiO2 based)
Sandstone concretion (Ironstone-stained)
Arenite with Limonite/Hematite staining (Silica-based with Iron Oxides)
Sandstone (Water-worn Cobble)
Arenite (SiO2 based)
Quartz (Milky/Rose variety)
Silicon Dioxide (SiO2)
Carnelian
Carnelian (SiO2 with Iron Oxide impurities)
Pyrite
Iron Disulfide (FeS2)