Banded Sandstone (River Pebble)
Clastic Sedimentary Rock (primarily Quartzite and Feldspar grains)
Category
Browse marble specimens identified by the Rock Identifier community.
Banded Sandstone (River Pebble)
Clastic Sedimentary Rock (primarily Quartzite and Feldspar grains)
Sandstone
Arenite (Sedimentary rock composed of sand-sized grains)
Chert (Jasper)
Microcrystalline Quartz (SiO2)
Chert (Siltstone-Chert mixture)
Microcrystalline Quartz (SiO2)
Chert (Jasper or Flint variant)
Chert (composed of microcrystalline quartz, SiO2)
Chert (or Flint)
SiO2 (predominantly microcrystalline quartz)
Serpentine Schist with Quartz Vein
Serpentine Schist (a type of Metamorphic rock). The white band is likely Quartz (SiO2).
Sandstone
Arenite or Sandstone
Diamond (Cut Gemstone)
Carbon (C)
Red Chert (Jasper)
Silicon Dioxide (SiO2)
Chert Nodule
Microcrystalline Quartz (SiO2)
Fossilized Rugose Coral
Order Rugosa
Fossilized Coral (Favosites)
Favosites goldfussi
Chert / Flint
SiO2 (Silicon Dioxide)
Sandstone nugget
Arenite (primarily Quartz SiO2)
Sandstone
Arenite (SiO2 based)
Limestone
Calcium Carbonate (CaCO3)
Limestone (with possible Manganese oxide inclusions)
Sedimentary Calcium Carbonate (CaCO3)
Sandstone
Arenite (SiO2 based sedimentary rock)
Chert (Flint)
Microcrystalline Quartz (SiO2)
Fossilized Chiton (Polyplacophora)
Polyplacophora (fossilized valves)
Chert Pebble
Silicon dioxide (SiO2)
Fossiliferous Limestone
Calcium Carbonate (CaCO3) with fossil inclusions
Pearl
Aragonite / Calcium Carbonate (CaCO3)
Serpentine (Serpentinite)
Mg3Si2O5(OH)4
Limonite (Iron Ore)
Hydrated iron(III) oxide-hydroxide (FeO(OH)·nH2O)
Chert (Jasper/Flint variant)
Microcrystalline Quartz (SiO2)
Chert (Flint)
Microcrystalline Quartz (SiO2)
Chert (var. Jasper)
Microcrystalline Quartz (SiO2)
Weathered Sandstone with Algae Growth
Arenite
Chert / Greenstone
Silicon Dioxide (SiO2) with impurities
Chert (variations include Flint)
Chert (SiO2)
Fossilized Gastropod Shell
Class Gastropoda (Fossil)
Chert (Flint Nodules)
Cryptocrystalline Quartz (SiO2)
Sandstone (likely Arkose or Lithic)
Clastic sedimentary rock (primarily SiO2)
Serpentinite
Serpentinite (composed primarily of Serpentine group minerals, e.g., Lizardite, Chrysotile, Antigorite)
Serpentinite
Serpentinite (Mg, Fe, Ni)3Si2O5(OH)4
Chert (Flint)
Microcrystalline Quartz (SiO2)
Chert (Flint)
Silicon Dioxide (SiO2)
Siltstone
Siltstone (primarily SiO2, Al2O3)
Chert (Limonite-stained)
Microcrystalline Quartz (SiO2) with iron oxides
Sandstone
Arenite (SiO2 based)