Chert (Nodular Chert)
Silicon Dioxide (SiO2)
Category
Browse sedimentary (chemically precipitated mineral) specimens identified by the Rock Identifier community.
Chert (Nodular Chert)
Silicon Dioxide (SiO2)
Limonitic Sandstone (Stained Sandstone)
Clastic Sedimentary Rock with Iron Oxide (Limonite/Goethite) staining
Banded Iron Formation
Banded Iron Formation (BIF)
Chert / Flint Conglomerate
Silicified Sedimentary Breccia (primarily SiO2)
Chert (Common Opal/Jasper transition)
Silicon Dioxide (SiO2)
Banded Iron Formation (BIF)
Banded Iron Formation
Chert
Microcrystalline Quartz (SiO2)
Quartz (Milk or Clear Variety)
Silicon Dioxide (SiO2)
Chert (specifically Flint or Common Opal)
Silicon Dioxide (SiO2)
Graphite
Graphite (C)
Ironstone (with Limonite/Goethite)
Ferruginous Sedimentary Rock (contains Limonite FeO(OH)·nH2O and Hematite Fe2O3)
Jasper
Silicon dioxide (SiO2)
Chert (Jasper/Chalcedony)
Microcrystalline Quartz (SiO2)
Halite (Rock Salt)
Halite (Sodium Chloride, NaCl)
Septarian Nodule (Pebble)
Septarian concretion (composition: CaCO3, calcite, aragonite, and clay/mudstone)
Ironstone / Weathered Hematite
Iron oxide-rich sedimentary rock with Goethite/Hematite
Chert (Yellow Jasper/Flint)
Silicon Dioxide (SiO2)
Orange Calcite (Mexican Onyx)
Calcium Carbonate (CaCO3)
Optical Calcite (Iceland Spar)
Calcite (Calcium Carbonate, CaCO3)
Orange Calcite
Calcite (Calcium Carbonate, CaCO3)
Optical Calcite (Iceland Spar)
Calcite (Calcium Carbonate, CaCO3)
Chert (Flint)
Silicon Dioxide (SiO2)
Chert (White Chert)
Silicon Dioxide (SiO2)
Yellow Calcite
Calcium Carbonate (CaCO3)
Chert (Flint)
Chert (Silicon Dioxide, SiO2)
Chert (Jasper variety)
Silicon Dioxide (SiO2)
Geode (Unopened)
Silicon dioxide with various inclusions (SiO2)
Conglomerate
Conglomerate (a clastic sedimentary rock)
Chert (and Fossiliferous Chert)
Silicon Dioxide (SiO2)
Red Sandstone with Reduction Spot
Quartzose Sandstone with a Leach/Reduction Spot
Quartz Geode Pebble
Silicon Dioxide (SiO2)
Limonite with Goethite
Iron Hydroxide Mixture (FeO(OH)·nH2O)
Quartz Sand
Silicon Dioxide (SiO2)
Bauxite
Bauxite (Al(OH)3, γ-AlO(OH), and α-AlO(OH))
Druzy Quartz on Matrix
Silicon Dioxide (SiO2)
Chert (often called Flint in dark varieties)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Sand Grain (Silica/Quartz Grain)
Silicon Dioxide (SiO2)
Milky quartz
Quartz, silicon dioxide (SiO₂)
Chert / Flint
Silicon Dioxide (Microcrystalline Quartz, $SiO_2$)
Milky quartz
Quartz (silicon dioxide, SiO₂)
Tumbled milky quartz
Quartz (SiO₂), likely massive milky quartz
Liesegang Stone (Sandstone with Liesegang Rings)
Clastic sedimentary rock with li-secondary iron oxide mineralization