Limonite (Iron Ore)
FeO(OH)·nH2O (Hydrated iron(III) oxide-hydroxide)
Category
Browse mineral within a sedimentary rock specimens identified by the Rock Identifier community.
Limonite (Iron Ore)
FeO(OH)·nH2O (Hydrated iron(III) oxide-hydroxide)
Quartz (Milky/Chalcedony variety)
Silicon Dioxide (SiO2)
Sandstone
Arenite (primarily SiO2)
Sandstone
Arenite (predominantly SiO2)
Sandstone
Arenite
Moss Agate
Chalcedony (SiO2) with dendritic inclusions of Manganese or Iron oxide
Quartzite with Hematite
Metamorphosed Quartz Sandstone (SiO2 with Fe2O3 inclusions)
Sandstone (Ferruginous)
Arenite (Fe-rich)
Goldstone
Not a natural mineral or rock. It is an ornamental glass.
Bauxite
Bauxite (mixture of Hydrous Aluminum Oxides)
Sandstone
Arenite (primarily SiO2)
Shale
Fissile Mudstone (primarily composed of clay minerals and quartz)
Ironstone Concretion
Siderite or Hematite-bonded Concretion
Sandstone
Arenite (SiO2 based)
Amethyst Geode (Carved)
Amethyst (Violet Crystalline Quartz - SiO2)
Sandstone (with potential mineral inclusions)
Clastic sedimentary rock (primarily Quartz, SiO2)
Shale
Mudstone/Shale
Chert (Jasper)
Microcrystalline Quartz (SiO2) with Iron Oxide impurities
Sandstone
Arenite (primarily SiO2)
Sandstone with Foliose Lichen
Arenite (Rock matrix) with Xanthoparmelia or Flavoparmelia (Lichen genus)
Sandstone (Ferruginous)
Arenite (SiO2 with Iron Oxide impurities)
Black Tourmaline
Schorl (Na(Fe²⁺)₃Al₆(BO₃)₃Si₆O₁₈(OH)₄)
Chalcedony (Botryoidal or Tumbled)
Chalcedony (SiO₂)
Banded Calcite (Green Onyx)
Calcium Carbonate (CaCO3)
Chert Conglomerate (or Breccia)
Sedimentary Clastic Rock (variety: Ferruginous Chert Breccia)
Red Scoria (Lava Rock)
Vesicular Basalt / Scoria
Sandstone
Arenite
Gneiss (specifically Granitic Gneiss)
Gneiss (composed primarily of Quartz, Feldspar, and Biotite/Amphibole)
Jasper
Silicon Dioxide (SiO2) with impurities
Limonite Concretion (Ironstone)
Limonite (FeO(OH)·nH2O) / Goethite
Turquoise
Hydrated phosphate of copper and aluminum - CuAl6(PO4)4(OH)8·4H2O
Turquoise
Hydrated phosphate of copper and aluminium: CuAl6(PO4)4(OH)8·4H2O
Turquoise
Hydrated phosphate of copper and aluminium [CuAl6(PO4)4(OH)8·4H2O]
Sandstone with Iron Oxide (Limonite/Hematite)
Ferruginous Sandstone (SiO2 with FeO(OH)·nH2O)
Sandstone (Quartzose Sandstone)
Clastic Sedimentary Rock (primarily SiO2 with Fe2O3 staining)
Quartz / Common Opal Transition
Silicon Dioxide (SiO2)
Prehnite
Prehnite - Ca2Al(AlSi3O10)(OH)2
Chalcedony with Druzy Quartz Geode
Silicon Dioxide (SiO2)
Dalmatian Jasper (Dalmatian Stone)
Perthitic feldspar with Arfvedsonite inclusions
Yellow Chalcedony or River Jasper
Silicon Dioxide (SiO2)
Fancy Jasper
Silicon Dioxide (SiO2) with mineral inclusions
Chert (Nodule)
Crystalline Silicon Dioxide (SiO2)