Obsidian and Green Calcite
Volcanic Glass and Calcium Carbonate (CaCO3)
Category
Browse sedimentary (physico chemical) specimens identified by the Rock Identifier community.
Obsidian and Green Calcite
Volcanic Glass and Calcium Carbonate (CaCO3)
Orange Calcite
Calcium Carbonate (CaCO3)
Chert (often called Flint)
Microcrystalline Quartz (SiO2)
Limonite with Hematite
Hydrated iron(III) oxide-hydroxide with variable composition (FeO(OH)·nH2O)
Limonite with Trace Fossils
Hydrous Iron Oxide Mixture (FeO(OH)·nH2O)
Native Copper within Host Rock
Native Copper (Cu)
Chert
Microcrystalline Quartz (SiO2)
Chert (specifically a flint nodule component)
Microcrystalline quartz (SiO2)
Chert / Flint
Chert (SiO2)
Chert (Flint)
Microcrystalline or cryptocrystalline Quartz (SiO2)
White Calcite
Calcium Carbonate (CaCO3)
Calcite
Calcium Carbonate (CaCO3)
Orange Calcite
Calcium Carbonate (CaCO3)
Chert (and Limestone)
Silicon Dioxide (SiO2) in Calcium Carbonate (CaCO3)
Chert (with Quartz Vein)
Microcrystalline silica (SiO2)
Chert (Jasper/Flint variety)
Microcrystalline Quartz (SiO2)
Chert (White Flint)
Silicon Dioxide (SiO2)
Chert (Jasper/Flint variety)
Silicon Dioxide (SiO2)
Limonitic Sandstone (Stained Sandstone)
Clastic Sedimentary Rock with Iron Oxide (Limonite/Goethite) staining
Chert (Quartz Variety)
Chert (mostly SiO2 / Silicon Dioxide)
Quartz on Matrix
Silicon Dioxide (SiO2)
Limestone
Sedimentary rock composed of Calcium Carbonate (CaCO3)
Chert / Jasper
Silicon Dioxide (SiO2)
Chert (Jasper/Flint variety)
Silicon Dioxide (SiO2)
Chert (with Limestone/Carbonate matrix)
Sedimentary cryptocrystalline silica (SiO2)
Chert
Microcrystalline Quartz (SiO2)
Quartz Pebble
Silicon Dioxide (SiO2)
Quartz Pebble
Silicon dioxide (SiO2)
Chert (Jasper)
Silicon Dioxide (SiO2)
Chert (Field Stone)
Microcrystalline Quartz (SiO2)
Chert (Jasper/Chalcedony)
Microcrystalline Quartz (SiO2)
Chert (specifically Flint or Jasper variant)
Microcrystalline quartz (SiO2)
Limonite on Sandstone
Iron Oxyhydroxide (FeO(OH)·nH2O) on Quartz Sandstone
Raw Calcite
Calcium Carbonate (CaCO3)
Quartz pebble
Silicon Dioxide (SiO2)
Bentonite Clay
Montmorillonite (Al,Mg)2Si4O10(OH)2·nH2O
Bauxite
Bauxite (Al(OH)3, AlO(OH), AlOOH)
Chert (Flint)
Silicon Dioxide (SiO2)
Chert
Chert (Microcrystalline Quartz, SiO2)
Chert (Flint)
Silicon Dioxide (SiO2)
Quartz
Silicon Dioxide (SiO2)
Limonite and Goethite encrusted Chert/Ironstone
Hydrated Iron Oxide (FeO(OH)·nH2O) with cryptocrystalline Silica (SiO2)