Chert / Flint
Cryptocrystalline Quartz (SiO2)
sedimentary
Category
Mineral Within Sedimentary Rock
Browse mineral within sedimentary rock specimens identified by the Rock Identifier community.
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Gneiss (with Quartz and Biotite Mica)
Gneiss
metamorphic
Banded Calcite (often sold as 'Travertine' or 'Mexican Onyx')
Calcium Carbonate (CaCO3)
sedimentary
Chert / Flint
Microcrystalline Quartz (SiO2)
sedimentary
Conglomerate (Puddingstone)
Conglomerate (Clastic Sedimentary Rock)
sedimentary
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Pink Granite Gneiss
Granitic Gneiss
metamorphic
Chert
Cryptocrystalline Quartz (SiO2)
sedimentary
Sandstone (Wonderstone)
Silicified Sandstone / Orthoquartzite with Liesegang rings
sedimentary
Chert (and Flint)
Silicon Dioxide (SiO2)
sedimentary
Shale / Mudstone
Laminated Mudrock (Siliciclastic Sedimentary Rock)
sedimentary
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Quartz (Crystalline Cluster)
Silicon Dioxide (SiO2)
mineral
Gneiss
High-grade Metamorphic Gneiss
metamorphic
Quartz Nodule / Agate Geode
Silicon Dioxide (SiO2)
sedimentary
Chalcedony Geode Fragment
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Agate
Silicon Dioxide (Chalcedony), SiO2
sedimentary
Carnelian
Carnelian (SiO2, Silicon Dioxide with Iron Oxide impurities)
mineral
Carnelian
Carnelian (Chert/Chalcedony variety of Quartz, SiO2)
mineral
Wishing Stone (Quartz-veined Metamorphic/Sedimentary Rock)
Quartz Vein in Greywacke/Slate (SiO2 in host rock)
metamorphic
Conglomerate
Conglomeratic Sandstone
sedimentary
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Iron-rich concretion or weathered ironstone
Goethite–hematite limonite aggregate; commonly described as limonite or ironstone
sedimentary
Quartz Geode
Silicon Dioxide (SiO2)
sedimentary
Coal
Anthracite or Bituminous Coal (Carbon)
sedimentary
Chert (Jasper/Flint variety)
Silicon Dioxide (SiO2)
sedimentary
Chert (Jasper/Agate mix)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Jasper/Flint variety)
Microcrystalline Quartz (SiO2)
sedimentary
Chert / Flint
Microcrystalline quartz (SiO2)
sedimentary
Chert (Brown Variety)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Gneiss
Gneiss (high-grade metamorphic rock typically composed of quartz, feldspar, and mica)
metamorphic
Conglomerate
Conglomerate (Detrital Sedimentary Rock)
sedimentary
Gneiss (Metamorphic Rock)
Gneiss (variable mineral formula primarily containing Quartz, Feldspar, and Mica)
metamorphic
Yellow Ocherous Siltstone (Limonitic Shale)
Limonitic Siltstone / Goethite-rich Sedimentary Rock
sedimentary
Quartzite Conglomerate
Conglomerate (SiO2 rich)
sedimentary
River Stone / Pebble
Clastic Sediment (composed largely of Quartz, Feldspar, and various rock fragments)
Mineral, Sediment
Blue Opal in Matrix
Hydrated Silica (SiO2·nH2O)
mineral
Veined Pebble (Quartz/Calcite Veined Metamorphic/Sedimentary Rock)
Quartz / Calcite Veined Fault Breccia or Metamorphic Pebble
metamorphic
Shale
Argillite / Shale
sedimentary
Chert
Microcrystalline quartz (SiO2)
sedimentary
Banded Rock (likely Quartz-rich)
Uncertain, likely a Metamorphic Rock (e.g., Gneiss or Schist) with prominent Quartz and other minerals
Mineral