Limestone
Calcium Carbonate (CaCO3)
Category
Browse sedimentary (chemically precipitated) specimens identified by the Rock Identifier community.
Limestone
Calcium Carbonate (CaCO3)
Limestone Pebble
Sedimentary Calcium Carbonate (CaCO3)
Quartz
Silicon Dioxide (SiO2)
Limonite-stained Chert
Silicon Dioxide (SiO2) with Hydrated Iron Oxide (FeO(OH)·nH2O)
Flint / Chert
Silicon Dioxide (SiO2)
Limestone
Calcium Carbonate (CaCO3)
Flint
SiO2 (Cryptocrystalline Quartz)
Limestone
Calcium Carbonate (CaCO3)
Limestone
Calcium Carbonate (CaCO3)
Limestone
Calcium Carbonate (CaCO3)
Bauxite
Bauxite (Al2O3·2H2O)
Chert Pebble
Microcrystalline Quartz (SiO2)
Chert (River Pebble)
Microcrystalline Quartz (SiO2)
Chert Nodule
Microcrystalline Quartz (SiO2)
Chert (Jasper/Flint variant)
Silicon Dioxide (SiO2)
Chert (Flint)
Microcrystalline Quartz (SiO2)
Chert (River Pebble)
Microcrystalline silica (SiO2)
Chert (Jasper/Chalcedony mix)
Microcrystalline Quartz (SiO2)
Chert (Iron-stained)
Silicon Dioxide (SiO2)
Banded Chert
Silicon Dioxide (SiO2)
Jasper and Quartz River Pebble
Silicon Dioxide (SiO2) with impurities
Banded Limestone
Calcareous sedimentary rock (CaCO3)
River Pebble (Likely Chert or Fine-Grained Sandstone/Quartzite)
Siliciclastic clast (likely Chert or Quartzarenite/Quartzite pebble)
Limestone
Sedimentary rock composed primarily of Calcite (CaCO3)
Bauxite
Hydrated aluminum oxides (mixture of gibbsite, boehmite, and diaspore)
Limestone
Calcium Carbonate (CaCO3)
Bauxite
Bauxite (Al(OH)3, γ-AlO(OH), and α-AlO(OH))
Bauxite (Pisolitic Bauxite)
Bauxite (mixture of Hydrous Aluminum Oxides)
Bauxite
Bauxite (mixture of hydrous aluminum oxides: Al(OH)3 & AlO(OH))
Bauxite
Bauxite (Al(OH)3, AlO(OH))
Bauxite
Bauxite (Al2O3·2H2O mixed with iron oxides)
Quartz Pebble
Silicon Dioxide (SiO2)
Quartz (Milky/Clear variety)
Silicon Dioxide (SiO2)
Chert (Jasper-like Silicate)
Microcrystalline Quartz (SiO2)
Banded Chert (Agate/Jasper blend)
Microcrystalline Quartz (SiO2)
Chert (Yellow variety)
Microcrystalline quartz (SiO2)
Chert (Banded)
Microcrystalline Quartz (SiO2)
Chert (Jasper/Flint variety)
Microcrystalline Quartz (SiO2)
Garnet in Host Rock
Garnet Group (A3B2(SiO4)3)
Agate
Silicon Dioxide (Chalcedony), SiO2
Dalmatian Stone
Peralkaline Feldsphathic Igneous Rock
Geode with Quartz and Chalcedony
Silicon Dioxide (SiO2)