Limonite Concretion
Hydrated iron(III) oxide-hydroxide (FeO(OH)·nH2O)
Category
Browse sedimentary (physico chemical precipitate) specimens identified by the Rock Identifier community.
Limonite Concretion
Hydrated iron(III) oxide-hydroxide (FeO(OH)·nH2O)
Limonite Concretion (Ironstone)
Limonite (FeO(OH)·nH2O) / Goethite
Chert (Pebble)
Chert (Microcrystalline Quartz, SiO2)
Yellow Chert (River Stone/Pebble)
Chert (Cryptocrystalline Quartz, SiO2)
Chert / Jasper
Silicon Dioxide (SiO₂)
Chert (and Chert-based Jasper)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Chert / Flint
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Chert (often called Flint or Agate nodule)
Cryptocrystalline Quartz (SiO2)
Limestone (specifically Dolomitic Limestone)
Calcium Magnesium Carbonate (CaMg(CO3)2)
Chert (Siliceous Mudstone variant)
Microcrystalline quartz (SiO2)
Chert (Flint)
Silicon Dioxide (SiO2)
Chert (Smoky variety)
Microcrystalline Quartz (SiO2)
Chert (often called Jasper in this color)
Microcrystalline quartz (SiO2)
Chert (Nodule)
Silicon Dioxide (SiO2)
Chert (and Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Chert (Jasper/Flint variety)
Microcrystalline Quartz (SiO2)
Gray Chert (River Pebble)
Microcrystalline Quartz (SiO2)
Chert (often called Flint or Jasper when red)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Chert (Flint)
Microcrystalline Quartz (SiO2)
Chert (often called Flint for dark varieties)
Chert (SiO2)
Chert (Jasper variety)
Silicon Dioxide (SiO2) with iron oxide impurities
Chert (Flint)
Silicon Dioxide (SiO2)
Chert / Flint
Silicon Dioxide (SiO2)
Chert (Nodule)
Microcrystalline Silica (SiO2)
Chert (specifically Gray Chert)
Silicon Dioxide (SiO2)
Chert / Flint
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Chert (Pink Jasper)
Microcrystalline Quartz (SiO2)
Chert (Field Stone)
Chert (SiO2)
Chert (Tan/Brown)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
Chert (specifically Flint)
Microcrystalline Quartz (SiO2)
Chert (Iron-stained variant)
Microcrystalline Quartz (SiO2)
Chert (Yellow or Brown Jasper)
Microcrystalline Quartz (SiO2)
Chert (often called Flint)
Microcrystalline Quartz (SiO2)
Limestone
Calcium Carbonate (CaCO3)
Chert (varieties include Flint and Jasper)
Silicon Dioxide (SiO2) / Microcrystalline Quartz
Chert (often called Flint when dark)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Chert (Flint)
Silicon Dioxide (SiO2)
Calcite
Calcium Carbonate (CaCO3)
Chert (Flint)
Microcrystalline Quartz (SiO2)
Banded Chert
Microcrystalline Quartz (SiO2)
Chert (often called Flint or Chalcedony Jasper)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Chert (varieties include Flint and Jasper)
Silicon Dioxide (SiO2) - Microcrystalline Quartz