Ironstone (likely Limonite or Goethite)
Ferruginous sedimentary rock (FeO(OH)·nH2O)
Category
Browse mineral like industrial smelting waste specimens identified by the Rock Identifier community.
Ironstone (likely Limonite or Goethite)
Ferruginous sedimentary rock (FeO(OH)·nH2O)
Orange Calcite
Calcite (CaCO3)
Milky Quartz Nodule / Geode precursor
Silicon Dioxide (SiO2)
Quartz Geode
Silicon Dioxide (SiO2)
Clear Quartz Crystal
Quartz (Silicon Dioxide, SiO2)
Clear Quartz (Carved Dragon)
Quartz (Silicon Dioxide, SiO2)
Schist
Mica Schist
Schist (Micaceous)
Mica Schist
Clear Quartz Crystal
Silicon Dioxide (SiO2)
Olivine (Peridot)
Olivine (Mg, Fe)2SiO4
Ruby
Corundum (Al2O3)
Pink Sapphire
Corundum (Al2O3) with Chromium/Iron/Titanium trace impurities
Quartzite
Quartzite (Primary mineral: SiO2)
Sandstone (with biological crust)
Arenite (SiO2 based)
Sandstone with Algae Growth
Arenite with Chlorophyta/Lichen
Milky Quartz with Iron Staining
Quartz (Silicon Dioxide, SiO2)
Diamond in Kimberlite
Kimberlite host rock with C (Carbon) inclusion
Quartz Geode (Cracked)
Silicon Dioxide (SiO2)
Vanadinite
Vanadinite (Pb5(VO4)3Cl)
Green Tourmaline
Elbaite (Na(Li,Al)3Al6(BO3)3Si6O18(OH)4)
Milky Quartz Mushroom Carving
Quartz (Silicon Dioxide, SiO2)
Iron-stained Quartz (Gossan/Limonite-coated Quartz)
Silicon Dioxide (SiO2) with Hydrated Iron Oxides (FeO(OH)·nH2O)
Yellow Quartz (Citrine or Iron-stained Quartz)
Silicon Dioxide (SiO2)
Marble (Carrara style)
Recrystallized Calcite-rich Metamorphic Rock (CaCO3)
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
Cubic Zirconia (as a jewelry specimen)
Zirconium dioxide (ZrO2)
Red Sandstone
Sandstone (lithic arenite or arkose with iron oxide)
Blue Apatite
Chlorapatite / Fluorapatite (Ca5(PO4)3(F,Cl,OH))
Milky Quartz (Beach Pebble)
Quartz (Silicon Dioxide, SiO2)
Magnetite or Magnetic Iron Ore
Magnetite (Fe3O4)
Fossilized bivalve shell fragment
Pectinid or related scallop bivalve; shell originally composed mainly of calcite (CaCO₃)
Gold Ore in Quartz
Auriferous Quartz (SiO2 with Au inclusions)
Diamond (Cullinan Heritage)
Carbon (C)
Pink Garnet in Matrix
Grossular or Almandine Garnet (X3Y2(SiO4)3)
Granitic Pegmatite
Pegmatite containing Quartz, Feldspar, and Muscovite mica
Quartz Pebble
Silicon Dioxide (SiO2)
Milky Quartz with Iron Inclusions
Quartz (Silicon Dioxide, SiO2)
Yellow Calcite
Calcium Carbonate (CaCO3)
Shale
Laminated Mudstone (Shale)
Lepidolite
K(Li,Al)_3(Si,Al)_4O_10(F,OH)_2 (Lithium-bearing Mica)
Olivine (Peridot)
Magnesium Iron Silicate (Mg, Fe)2SiO4
Limonite and Goethite
Limonite (hydrated iron(III) oxide-hydroxide) and Goethite (α-FeO(OH))