Ferruginous Quartz
Quartz with Iron Oxide inclusions (SiO2 + Fe2O3)
mineral
Category
Mineral Within A Sedimentary Rock
Browse mineral within a sedimentary rock specimens identified by the Rock Identifier community.
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Quartz Druzy on Geode Fragment
Silicon Dioxide (SiO2)
mineral
Hag Stone
Perforated sedimentary rock (typically sandstone or limestone)
sedimentary
Jasper with Quartz Veins
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Chert (Flint Nodules)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Gneiss
Gneiss (SiO2-rich metamorphic rock)
metamorphic
Quartz vein in host rock
Quartz (SiO₂), likely in a weathered carbonate or sedimentary matrix
mineral
River Quartzite Siltstone
Quartz-rich Meta-siltstone (SiO2 dominated)
metamorphic
Sandstone (with Possible Iron Staining/Crust)
Arenite (SiO2 based)
sedimentary
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Mica Schist
Mica Schist (contains muscovite/biotite, quartz, plagioclase)
metamorphic
Breccia Pebble
Sedimentary Breccia
sedimentary
Dalmatian Jasper
Peralkaline rhyolite
igneous
Chert (Chert Pebble)
Microcrystalline or cryptocrystalline Quartz (SiO2)
sedimentary
Pyrite in Quartz
Iron Sulfide (FeS2) in Silicon Dioxide (SiO2)
Mineral
Amethyst Geode Fragment
Amethyst (Silicon Dioxide, SiO2) with Quartz matrix
mineral
Calcite Geode
Calcium Carbonate (CaCO3)
mineral
Ironstone Concretion / Goethite-Hematite Nodule
Goethite/Hematite (α-FeO(OH) / Fe2O3)
sedimentary
Sandstone (Ferruginous)
Arenite (Fe2O3 enriched)
sedimentary
Quartz (Druzy Quartz)
Silicon Dioxide (SiO2)
mineral
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Sandstone
Arenite (primarily Quartz Arenite)
sedimentary
Sandstone Pebble
Arenite (majoritarily SiO2)
sedimentary
African Turquoise
African Turquoise (a trade name for Jasper, a variety of Chalcedony: SiO2)
sedimentary
Concretion
Sedimentary Concretion (e.g., Siderite or Ironstone)
sedimentary
Turquoise
Hydrous phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)
mineral
Sandstone (Quartzose Sandstone)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Ironstone Concretion
Siderite or Ferruginous Concretion (FeCO3 or Iron Oxides)
sedimentary
Concretion
Septarian or Siderite Concretion
sedimentary
Sandstone (with Iron Siderite Concretion)
Arenite with Ironstone Concretion (FeCO3)
sedimentary
Red Jasper
Red Jasper (SiO2 with Fe2O3 impurities)
sedimentary
Quartz Geode (Druzy Quartz)
Silicon Dioxide (SiO2)
mineral
Shale with Coprolite influence
Argillaceous sedimentary rock (Shale/Mudstone)
sedimentary
Gneiss Pebble
Gneiss
metamorphic
Quartzite Geode or Crystalline Quartz Node
Silicon Dioxide (SiO2)
metamorphic
Gneiss
Gneiss (Foliated Metamorphic Rock)
metamorphic
Limonite Geode (Ironstone Concretion)
FeO(OH)·nH2O (Hydrated Iron Oxide)
sedimentary
Chert (Sedimentary Rock)
Silicon Dioxide (SiO2)
sedimentary
Red Jasper
Silicon Dioxide (SiO2 with Hematite impurities)
mineral
Chalcedony Nodule / Agate
Silicon Dioxide (SiO2)
sedimentary
Gneiss
Gneiss (Foliated Metamorphic Rock)
metamorphic
Sandstone (Iron-stained)
Arenite (composed primarily of SiO2 with Fe2O3 staining)
sedimentary