Eroded Limestone with Iron Staining
Carbonate Rock (CaCO3)
sedimentary
Category
Sedimentary (Chemically Precipitated) Or Metamorphic
Browse sedimentary (chemically precipitated) or metamorphic specimens identified by the Rock Identifier community.
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Green Chert
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Iron-stained)
Microcrystalline Quartz (SiO2)
sedimentary
Red Quartzite
Metamorphic Quartzite (SiO2)
metamorphic
Aragonite (Onyx Marble)
Calcium Carbonate (CaCO3), Orthorhombic crystal system
mineral
Quartzite / Sandstone / Chert Mix
Silicon Dioxide (SiO2)
sedimentary and metamorphic
Raw Calcite
Calcium Carbonate (CaCO3)
mineral
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Pyrite
Iron Sulfide (FeS2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Hematite
Iron(III) oxide (Fe2O3)
Mineral
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Calcite
Calcium Carbonate (CaCO3)
mineral
Hematite
Hematite (Fe2O3)
mineral
Fossilized Limestone with Crinoid Stem
Carboniferous Limestone (containing Crinoidea ossicles)
fossil
Blue calcite (probable)
Calcite, calcium carbonate (CaCO₃)
mineral
Red Agate
Agate (Cryptocrystalline variety of Quartz, SiO2)
mineral
Chert / Chalcedony Nodules
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Barite Rose on Marcasite
Barium Sulfate (BaSO4) on Iron Sulfide (FeS2)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Coquina Limestone (Fossiliferous Limestone)
Calcareous bioclastic sedimentary rock (CaCO3)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Chert on Volcanic Host Rock
Sedimentary Chert (SiO2) within Basalt or Andesite
sedimentary
Moqui Marble (Sandstone Concretion)
Hematite-cemented Sandstone (Fe2O3 + SiO2)
sedimentary
Septarian Nodule
Septarian Concretion (CaCO3 with Siderite/Calcite)
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Calcite
Calcium Carbonate (CaCO3)
mineral
Limestone Pebble
Calcite-rich Sedimentary Rock (CaCO3)
sedimentary
Red Jasper (Brecchiated Jasper)
Silicon Dioxide (SiO2) with Hematite impurities
Sedimentary / Mineral
Weathered iron-rich concretion or laterite fragment
Ferruginous concretion, likely goethite/limonite (hydrated iron oxides) in a clay-rich matrix
sedimentary
Jasper with Hematite
Silicon Dioxide (SiO2) with Ferric Oxide (Fe2O3)
sedimentary
Microcrystalline Limestone
Limestone (CaCO3 with impurities)
sedimentary
Ocean Jasper
Orbicular Jasper (Silicon Dioxide, SiO2)
sedimentary
Hematite
Iron(III) oxide (Fe2O3)
Mineral
Chalcedony (specifically Agate or Flint)
Silicon Dioxide (SiO₂)
Mineral
Orange Calcite
Calcite (Calcium Carbonate, CaCO3)
mineral
Orange Calcite
Calcite (Calcium Carbonate - CaCO3)
mineral