Ironstone Concretion
Ironstone (Siderite/Goethite/Hematite matrix)
sedimentary
Category
Mineral Within Sedimentary Rock
Browse mineral within sedimentary rock specimens identified by the Rock Identifier community.
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Chert / Flint
Silicon Dioxide (SiO2)
sedimentary
Chert (Jasper/Mudstone variety with Oxidation)
Silicon dioxide (SiO2)
sedimentary
Flint
Silicon dioxide (SiO2)
sedimentary
Limonite Concretion
Goethite-rich Concretion (FeO(OH))
sedimentary
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Sandstone
Arenite (primarily Quartz, SiO2)
sedimentary
Green Moss Agate
Silicon Dioxide (SiO2) with Mineral Inclusions
sedimentary
Quartz Geode
Crystalline Silicon Dioxide (SiO2) in Geode form
mineral
Sandstone (Ferruginous)
Arenite (with iron oxide cement)
sedimentary
Sandstone (Quartzose Sandstone)
Arenite (SiO2 principal component)
sedimentary
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Sandstone
Arenite (Sedimentary rock composed of sand-sized grains)
sedimentary
Conglomerate
Conglomerate (Sedimentary Rock)
sedimentary
Sandstone with Iron Staining
Arenite (SiO2 with Fe2O3)
sedimentary
Banded Sandstone
Arenite with Liesegang banding
sedimentary
Green Jasper
Silicon Dioxide (SiO2) with impurities
sedimentary
Clear Quartz (Druzy)
Crystalline Silicon Dioxide (SiO2)
mineral
Banded Gneiss
Gneiss
metamorphic
Hag Stone
Perforated sedimentary rock (typically limestone, sandstone, or flint)
sedimentary
Sandstone Concretion
Ferruginous Sandstone Concretion (Primarily SiO2 with Iron Oxide cement)
sedimentary
Gneiss
Gneiss (Foliated Metamorphic Rock)
metamorphic
Quartz Geode
Crystalline Silicon Dioxide (SiO2) within a nodule
sedimentary
Gneiss (Granulite / Foliated Metamorphic Rock)
Gneiss
metamorphic
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Garnet Schist
Almandine Garnet in Mica Schist
metamorphic
Turquoise in Matrix
Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)
mineral
Chert (Yellow/Tan Variety)
Chert (SiO2)
sedimentary
Druzy Quartz on Matrix
Silicon Dioxide (SiO2) on host rock
mineral
Sandstone
Arenicola (comprising mostly Quartz, SiO2)
sedimentary
Ironstone Nodules (Limonite/Hematite)
Goethite/Hematite mix (FeO(OH)/Fe2O3)
sedimentary
Turquoise
Hydrate phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)
mineral
Garnet Schist
Almandine Garnet-bearing Mica Schist
metamorphic
Banded Sandstone (Zebra Stone)
Arenite with Iron Oxide Banding (Liesegang rings)
sedimentary
Druzy Quartz Geode (Partially Open)
Silicon Dioxide (SiO2) within Sedimentary Host Rock
sedimentary
Chert (Flint)
Microcrystalline or cryptocrystalline Quartz (SiO2)
sedimentary
Gneiss (Metamorphosed Granitic Rock)
Gneiss (composed mainly of quartz, feldspar, biotite, and/or hornblende)
metamorphic
Quartz (Sunstone-like Chalcedony)
Silicon Dioxide (SiO2)
mineral
Sandstone Concretion
Arenaceous concretion (primarily SiO2 with Fe2O3 staining)
sedimentary
Sandstone (River Pebble)
Arenite (primarily SiO2)
sedimentary
Turquoise
Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)
mineral
Limonite Concretion (Ironstone)
Limonite / Goethite (FeO(OH)·nH2O)
sedimentary