Sandstone (Sedimentary Rock)
Arenite (SiO2 based)
Category
Browse sedimentary (man made) specimens identified by the Rock Identifier community.
Sandstone (Sedimentary Rock)
Arenite (SiO2 based)
Sandstone Pebble
Arenite (SiO2 based)
Sandstone (Quartzose)
Arenite (primarily SiO2)
Limestone (River Pebble)
Calcium Carbonate (CaCO3)
Sandstone (Quartzose Pebble)
Arenite (composed primarily of SiO2)
Sandstone (Quartzose)
Arenite (composed primarily of SiO2)
Quartz Pebble
Silicon Dioxide (SiO2)
Pyrite
Iron Sulfide (FeS2)
Hematite
Hematite (Fe2O3)
Orange Calcite
Calcium Carbonate (CaCO3)
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Celestine (or Celestite) on Matrix
Celestine (SrSO4)
Quartz (Milky/Clear Fragment)
Silicon Dioxide (SiO2)
Manganese Oxide Crust on Limestone
Manganese Oxides (e.g., Pyrolusite MnO2 or Romanechite) on CaCO3
Sandstone
Arenite
Sandstone (Quartz Arenite)
Sandstone (SiO2 with possible mineral cements)
Shale
Shale (Lutite)
Sandstone
Arenite (primarily SiO2)
Sandstone
Arenite
Sandstone
Arenite
Petrified Wood
Silicified Wood (Per mineral content: SiO2, Quartz/Chalcedony)
Clear Quartz Crystal
Silicon Dioxide (SiO2)
Potassium Feldspar (Orthoclase)
KAlSi3O8
Sandstone with Manganese Dendrites
Arenite (mostly SiO2) with Manganese Oxide inclusions (MnO2)
Sandstone
Sedimentary Rock (Quartz arenite)
Quartz Pebble
Silicon Dioxide (SiO2)
Sandstone
Arenite (SiO2 based)
Shale with Coprolite influence
Argillaceous sedimentary rock (Shale/Mudstone)
Sandstone (likely Quartzose)
Arenite
Chert (Common Opal or Chalcedony)
Microcrystalline Quartz (SiO2)
Tumbled amethyst with possible lepidolite/colored quartz companion
Amethyst, purple quartz (SiO₂), likely with iron-related color centers
Likely basalt (possibly scoriaceous basalt)
Basalt; chiefly plagioclase feldspar, pyroxene, and commonly olivine, with minor iron–titanium oxides
Wishing Stone (Basalt or Chert with Quartz Veins)
Basalt or microcrystalline Quartz (Chert) with localized hydrothermal Quartz (SiO2) veining
Basalt with Plagioclase Phenocrysts
Porphyritic Basalt
Wishing Stone (Gneiss or Basalt with Quartz Vein)
Gneiss or Metabasalt (with a Quartz or Calcite intrusion)
Granite Pebble
Granite (Phaneritic intrusive igneous rock)
Quartz
Silicon Dioxide (SiO2)
Agate Geode (Unopened)
Cryptocrystalline Quartz (SiO2) with Chalcedony
Red Jasper
Silicon dioxide with iron inclusions (SiO2)
Sandstone
Arenite (primarily SiO2)
Sandstone (with potential fossil inclusions)
Clastic sedimentary rock (primarily SiO2)