Ironstone Concretion (Moqui Marble variety)
Ferruginous Sandstone Concretion
Category
Browse mineral within a sedimentary rock specimens identified by the Rock Identifier community.
Ironstone Concretion (Moqui Marble variety)
Ferruginous Sandstone Concretion
Ironstone Concretion (Moqui Marble type)
Ironstone Concretion (Fe2O3 with SiO2 core)
Agate
Silicon Dioxide (SiO2)
Quartz Geode / Druzy Quartz
Silicon Dioxide (SiO2)
Turquoise
Hydrated phosphate of copper and aluminium [CuAl6(PO4)4(OH)8·4H2O]
Gneiss
Gneiss (high-grade metamorphic rock)
Garnet in Schist/Gneiss Matrix
Almandine (Fe3Al2(SiO4)3) or Pyrope (Mg3Al2(SiO4)3)
Garnet Schist or Garnet-bearing Quartzite
Metamorphic rock containing Almandine Garnet (Fe3Al2(SiO4)3) and Quartz (SiO2)
Sandstone
Clastic sedimentary rock (primarily SiO2)
Conglomerate
Conglomerate (Clastic Sedimentary Rock)
Sandstone Concretion
Clastic Sedimentary Concretion (SiO2 with Iron Oxide)
Sandstone (Quartzose Sandstone)
Clastic sedimentary rock (primarily SiO2)
Chert / Flint Jasper
Microcrystalline Quartz (SiO2)
Chalcedony in Matrix (likely Agatized Coral or Chert)
Silicon Dioxide (SiO2)
Chert (Flint)
Microcrystalline Quartz (SiO2)
Chert (Chert / Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Sandstone Concretion
Clastic Sedimentary Concretion (primarily SiO2 with Fe2O3 cement)
Sandstone Concretion
Sedimentary Concretion (Quartz sandstone with iron oxide cement)
Dalmatian Jasper
Peralkaline Quartz Feldspar Porphyry
Carnelian
Carnelian (Silicon Dioxide, SiO2)
Limestone with Calcite Veins
Calcium Carbonate (CaCO3)
Weathered iron-rich sandstone or ironstone
Ferruginous sandstone, commonly quartz-rich with iron oxides (Fe₂O₃/FeOOH)
Quartz Druzy (Geode Fragment)
Silicon Dioxide (SiO2)
Sandstone Concretion
Ferruginous Sandstone Concretion (SiO2 + FeO(OH))
Sandstone with Iron Staining
Arenite with Limonite/Hematite inclusions (SiO2 + Fe2O3/FeO(OH))
Mica Schist
Schist (Mica-rich Metamorphic Rock)
Ruby in Kyanite
Al2O3 (Corundum) in Al2SiO5 (Kyanite-Fuchsite-Quartz)
Gneiss
Gneiss (High-grade metamorphic rock)
Turquoise
Hydrated phosphate of copper and aluminium - CuAl6(PO4)4(OH)8·4H2O
Agate
Chalcedony (SiO2) with impurities
Yellow Jasper
Silicon Dioxide (SiO2) with Iron Hydroxide impurities
Turquoise
Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)
Concretion
Septarian Concretion (Clay-Ironstone Nodules)
Geode with Quartz and Chalcedony
Silicon Dioxide (SiO2)
Quartz Geode
Silicon Dioxide (SiO2)
Turquoise
CuAl6(PO4)4(OH)8·4H2O
Quartz-veined Gneiss
Gneiss with Quartz (SiO2) intrusions
Turquoise
Turquoise (Hydrated phosphate of copper and aluminium), CuAl6(PO4)4(OH)8·4H2O
Quartz Geode
Silicon Dioxide (SiO2)
Herkimer Diamond
Quartz (Silicon Dioxide, SiO2)
Clear Quartz Geode
Crystalline Silicon Dioxide (SiO2)
Hagstone (Adder Stone)
Chert or Sedimentary pebble with natural perforation