Shale or Slaty Mudstone
Argillaceous sedimentary rock
sedimentary
Category
Mineral Within Sedimentary Rock
Browse mineral within sedimentary rock specimens identified by the Rock Identifier community.
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Limestone with Algal/Lichen Colonization
Calcium Carbonate (CaCO3)
sedimentary
Quartzite pebble with Mafic inclusions
Quartzite (SiO2)
metamorphic
Gneiss
Gneiss
metamorphic
Chert (Flint)
Chert (SiO2)
sedimentary
Granitic Gneiss Pebble
Gneiss (felsic metamorphic rock)
metamorphic
Ironstone (Limonitic Concretion)
Limonite (FeO(OH)·nH2O) with Goethite and Hematite inclusions
sedimentary
Sandstone with Hematite staining
Arenite with Fe2O3 inclusions
sedimentary
Chert (Nodule)
Chert (composition: SiO2)
sedimentary
Chert with Quartz Vein
Microcrystalline Quartz (SiO2)
sedimentary
Ammonite Fossil in Matrix
Ammonoidea subclass (e.g., Arietites or similar genera)
fossil
Ironstone Concretion
Ferruginous Sandstone / Iron-rich Sedimentary Rock
sedimentary
Brachiopod Fossil in Sedimentary Rock
Phylum Brachiopoda fossil imprint in sedimentary matrix
fossil
Gneiss (with Quartz-Feldspar vein)
Gneiss (high-grade metamorphic rock) containing Quartz (SiO2) and Feldspar (KAlSi3O8 – NaAlSi3O8 – CaAl2Si2O8)
metamorphic
Chert (Flint)
Microcrystalline quartz (SiO2)
sedimentary
Chert (Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (Green Fossilized Algae or Jasper)
Silicon Dioxide (SiO2)
sedimentary
Dalmatian Stone
Dalmatian Stone (a peralkaline igneous rock consisting of Feldspar, Quartz, and Arfvedsonite)
igneous
Precious Opal in Matrix
Hydrated Silica (SiO2·nH2O)
mineral
Sandstone
Arenite (SiO2 primarily)
sedimentary
Conglomerate
Polymictic Conglomerate
sedimentary
Flint
SiO2 (Microcrystalline Quartz / Chert)
sedimentary
Smoky Quartz and Biotite Schist
Quartz-Biotite Schist (SiO2 + K(Mg,Fe)3AlSi3O10(F,OH)2)
metamorphic
Basalt with Quartz Vein
Extrusive Igneous Rock / Volcanic Rock
igneous
Chert (Jasper variety)
Silicon Dioxide (SiO2)
sedimentary
Chalcedony in Host Rock
Chalcedony (SiO2)
mineral
Chert (Chert Nodule with Chalky Cortex)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Chert Nodules with Iron Staining
Microcrystalline Quartz (SiO2)
sedimentary
Quartz Calcite Vug in Limestone
Calcium Carbonate (CaCO3) with Silicon Dioxide (SiO2) inclusions
sedimentary
Chert Nodules in Limestone
Microcrystalline Quartz (SiO2) within Calcium Carbonate (CaCO3)
sedimentary
Quartz Vein in Host Rock
Hydrothermal Quartz (SiO2) in Slates/Schists
metamorphic
Shale with Plant Fossils / Carbonaceous Shale
Laminated Mudrock (Siliciclastic)
sedimentary
Banded Gneiss
Gneiss (Metamorphic rock)
metamorphic
Chert / Jasper
Silicon Dioxide (SiO2)
sedimentary
Chert Pebble
Chert (Microcrystalline Quartz, SiO2)
sedimentary
Chert Nodule
Microcrystalline Quartz (SiO2)
sedimentary
Quartz Druse (on Chalcedony/Agate base)
Silicon Dioxide (SiO2)
mineral
Garnet Schist
Almandine Garnet-Mica Schist (X₃Y₂(SiO₄)₃)
metamorphic
Ferruginous Chert (Jasper)
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Conglomerate
Conglomerative Sedimentary Rock
sedimentary
Slickenside in Limestone
Tectonized Limestone / Calcite (CaCO3)
metamorphic (localized) or sedimentary
Chert (often called Flint when dark)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary