Chert (Flint Nodules)
Cryptocrystalline Quartz (SiO2)
sedimentary
Category
Sedimentary Rock
Browse sedimentary rock specimens identified by the Rock Identifier community.
Learn about Sedimentary Rock in the encyclopedia
View all →
Hag Stone
Perforated Chert (Microcrystalline Silica, SiO2)
sedimentary
Sandstone (Quartzite Pebble)
Arenite / Metamorphosed Sandstone (SiO2)
sedimentary
Greywhacke (River Pebble)
Graywacke (immature sandstone)
sedimentary
Chert (and Flint variant)
Chert (SiO2)
sedimentary
Liesegang Banded Sandstone (Wonderstone)
Ferruginous Sandstone with Liesegang Rings
sedimentary
Chert (Iron-stained)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Jasper/Agate variety)
Silicon Dioxide (SiO2)
sedimentary
Chert (specifically tan/pink variety)
Silicon Dioxide (SiO2)
sedimentary
Sandstone with Liesegang Rings
Arenite with secondary Iron oxide (Limonite/Goethite) precipitation
sedimentary
Chert (Jasper variety)
Silicon Dioxide (SiO2)
sedimentary
Chert (within Limestone)
Silicon Dioxide (SiO2) in Calcium Carbonate (CaCO3) matrix
sedimentary
Chert (Polished Gemstone / River Stone)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Picture Jasper
Silicon Dioxide (SiO2) with iron oxide and clay impurities
sedimentary
Concrete / Conglomerate (Man-made)
Artificial Conglomerate (Cementitious Composite)
sedimentary
Graywacke
Graywacke Sandstone
sedimentary
Black Sand (Magnetite Sand)
Magnetite-rich Placers (Fe3O4)
sedimentary
Greywacke (River Siltstone)
Lithic Wacke (Sandstone subfamily)
sedimentary
Fossiliferous Limestone
Calcium Carbonate (CaCO3) with Bioclastic Inclusions
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Gneiss with Quartz Veining
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Druzy Quartz
Silicon Dioxide (SiO2)
mineral
Felsic Drill Core (likely Gneiss or Granite)
Felsic Metamorphic Rock (Gneissic profile)
metamorphic
Gneiss
Gneiss (High-grade Metamorphic Rock)
metamorphic
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Green Jasper with Quartz veins
Jasper (Silicon Dioxide, SiO2)
sedimentary
Chert (Nodule)
Chert (Silicon Dioxide, SiO2)
sedimentary
Gneiss
Metamorphic Rock (Gneissic texture)
metamorphic
Quartz-Veined Mudstone
Argillite or Mudstone with Quartz Veining (SiO2 in Siliciclastic Matrix)
sedimentary
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Banded Agate (Lake Superior Agate)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
sedimentary
Red Sandstone
Arenite (Ferruginous Sandstone)
sedimentary
Chert (often called Jasper in this color)
Microcrystalline quartz (SiO2)
sedimentary
Fossilized Bored Limestone
Limestone with Ichnofossils (Gastrochaenolites or Entobia)
sedimentary
Chert (Iron-stained)
Chert (SiO2)
sedimentary
Coquina
Coquina (Bioclastic Limestone)
sedimentary
Chert (Jasper/Flint variety)
Microcrystalline Quartz (SiO2)
sedimentary
Oolite (Ooid Limestone)
Ooidal Limestone (comprised of CaCO3)
sedimentary
Ferruginous Chert (Jasper)
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Crinoid Fossil Stem Segment
Class Crinoidea (Echinodermata)
sedimentary
Banded Chert
Microcrystalline silicon dioxide (SiO2)
sedimentary