Limestone
Calcium Carbonate (CaCO3)
sedimentary
Category
Sedimentary (Chemical)
Browse sedimentary (chemical) specimens identified by the Rock Identifier community.
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Chert (specifically a stream-worn Chert Nodule)
Sedimentary Cryptocrystalline Quartz (SiO2)
sedimentary
Gold Ore
Native Gold (Au)
mineral
Quartz (Grain)
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Limestone
Calcium Carbonate (primarily CaCO3 as Calcite or Aragonite)
sedimentary
Banded Chert (or River Jasper)
Microcrystalline Quartz (SiO2) with iron oxide impurities
sedimentary
Mookaite (Mookaite Jasper)
Silicified Radiolarite (SiO2 with iron oxides)
sedimentary
Chert (Iron-stained)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Red Jasper (Opaque Chalcedony)
Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions
sedimentary
Banded Calcite (often sold as 'Mexican Onyx' or 'Green Onyx')
Calcite (CaCO3)
sedimentary
Chert (Iron-stained)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (varietal Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (Flint Pebbles)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Riverstone (Sandstone Pebble)
Arenite (SiO2 with various lithic fragments)
sedimentary
Chert (with Quartz vein)
Chert (Silicon Dioxide, SiO2)
sedimentary
Limestone
Calcium carbonate ( преимущественно CaCO3)
sedimentary
Banded Calcite (often sold as Onyx)
Calcite (Calcium Carbonate, CaCO3)
sedimentary
Chert / Flint (with Crinoid Stem Molds)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Flint)
Chert (Cryptocrystalline variety of Quartz, SiO2)
sedimentary
Quartzite with Sandstone/Iron staining
Metamorphic Quartzite (SiO2)
metamorphic
Native Sulfur
Sulfur (S8)
mineral
Gold
Native Gold (Au)
mineral
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Microcrystalline Limestone Pebble
Carbonate sedimentary rock (Calcium Carbonate, CaCO3)
sedimentary
Quartz Geode
Silicon Dioxide (SiO2) in Geode form
sedimentary
Chert (Jasper/River Pebble)
Silicon Dioxide (SiO2)
sedimentary
Chert (specifically Chert Nodule/Flint)
Chert (Silicon Dioxide, SiO2)
sedimentary
Chert / Flint (with Iron Staining)
Silicon Dioxide (SiO2)
sedimentary
Chert (Nodular or Fossiliferous)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Chert (specifically Flint or Nodular Chert)
Silicon Dioxide (SiO2)
sedimentary
Quartz (Milky/Clear variety)
Silicon Dioxide (SiO2)
mineral
Sandstone
Arenite (predominantly SiO2 quartz grains)
sedimentary
Iron Ore (Magnetite-Hematite)
Magnetite (Fe3O4) and Hematite (Fe2O3)
mineral
Quartzite Pebble
Meta-quartzite
metamorphic
Agate Geode
Chalcedony (SiO2 - Silicon Dioxide)
sedimentary (secondary mineral formation)
Grey River Stone (Quartz-rich Quartzite/Siltstone)
Quartzite / Meta-siltstone (primarily SiO2)
Metamorphic (low-grade)
Chert (and Chalcedony/Agate mixture)
Microcrystalline Quartz (SiO2)
sedimentary
Coal (most likely Bituminous or Anthracite)
Coal (organic sedimentary rock)
Sedimentary
Limonite after Pyrite (Prophecy Stone)
Limonite (FeO(OH)·nH2O) replacing Pyrite (FeS2)
Mineral pseudomorph