Chert (Jasper variety)
Silicon Dioxide (SiO2)
sedimentary
Category
Mineral Within A Sedimentary Rock
Browse mineral within a sedimentary rock specimens identified by the Rock Identifier community.
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Common Opal / Chert
Hydrated silica (SiO2·nH2O) or Microcrystalline Quartz (SiO2)
mineral
Gneiss
Metamorphic rock (Gneiss)
metamorphic
Turquoise
Turquoise - CuAl6(PO4)4(OH)8·4H2O
gemstone
Precious Opal in Matrix
Hydrated Silica (SiO2·nH2O)
mineral
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Gneiss (with Quartzite and Mica)
Gneiss
metamorphic
Turquoise
CuAl6(PO4)4(OH)8·4H2O (Hydrated copper and aluminum phosphate)
mineral
Fossil-bearing sandstone or mudstone
Indeterminate sedimentary matrix with a possible bivalve or shell fossil
fossil
Geode (Unopened)
Siliceous Septarian Concretion / Geode (SiO2)
sedimentary
Quartz Vein in Host Rock
Silicon Dioxide (SiO2) within Sedimentary/Metamorphic Matrix
Metamorphic or Igneous (context dependent)
Sandstone
Arenite (SiO2 primarily)
sedimentary
Chert (Jaspery variety)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Flint Nodules)
Chert (Silicon Dioxide, SiO2)
sedimentary
Red Sandstone
Arenite (primarily SiO2 with Fe2O3)
sedimentary
Banded Gneiss
Gneiss (Metamorphic rock predominantly containing quartz, feldspar, and mica)
metamorphic
Hag Stone
Perforated sedimentary rock (typically limestone, sandstone, or flint)
sedimentary
Sandstone concretion (Ironstone-stained)
Arenite with Limonite/Hematite staining (Silica-based with Iron Oxides)
sedimentary
Agate
Chalcedony (SiO2) with impurities
sedimentary
Geode with Quartz and Chalcedony
Silicon Dioxide (SiO2)
sedimentary
Clear Quartz Geode
Crystalline Silicon Dioxide (SiO2)
mineral
Chert (Septarian or Banded Nodular Variety)
Microcrystalline Quartz (SiO2)
sedimentary
Limestone with Calcite Veins
Calcium Carbonate (CaCO3)
sedimentary
Flint (chert) nodule
Microcrystalline quartz (SiO₂), occurring as a flint/chert nodule in limestone
sedimentary
Septarian Nodule (Septarian Dragon Stone)
Septarian Concretion (CaCO3 + Al2Si2O5(OH)4)
sedimentary
Fossil-bearing fine-grained sedimentary rock
Likely fossiliferous mudstone or shale; visible feature may be a plant fragment, trace fossil, or mineral vein
fossil
Chert (within Limestone)
Silicon Dioxide (SiO2) in Calcium Carbonate (CaCO3) matrix
sedimentary
Sandstone (Ferruginous)
Arenite (primarily SiO2 with Fe2O3 staining)
sedimentary
Sandstone with Iron Staining
Arenite with Limonite/Hematite inclusions (SiO2 + Fe2O3/FeO(OH))
sedimentary
Pyrite-bearing Rock
Iron Sulfide (FeS2)
mineral
Moqui Marble (Shaman Stone)
Iron Oxide Concretion (Goethite/Hematite shell with Sandstone core)
sedimentary
Granite-like rock
Coarse-grained granitoid, likely granite or granodiorite
igneous
Weathered iron-rich rock (possibly ironstone)
Indeterminate ferruginous rock; likely iron-oxide-cemented sandstone or ironstone
sedimentary
Chalcedony (Agate/Chert variety)
Silicon Dioxide (SiO2)
mineral
Quartz-veined Gneiss
Gneiss with Quartz (SiO2) intrusions
metamorphic
Sandstone Concretion with Quartz Center
Sedimentary Clastic Rock (SiO2 matrix with Quartz core)
sedimentary
Gneiss
Gneiss (High-Grade Metamorphic Rock)
metamorphic
Gneiss
Gneiss (High-grade regional metamorphic rock)
metamorphic
Milky Quartz Geode / Chalcedony Nodule
Quartz (Silicon Dioxide - SiO2)
mineral
Chert (Chert / Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert
Chert (Microcrystalline Quartz, SiO2)
sedimentary
Gneiss
Gneissic Metamorphic Rock
metamorphic