Pyrite (Iron Pyrites)
Iron Sulfide (FeS2)
mineral
Category
Anthropogenic (Human Made) Sedimentary Like Material
Browse anthropogenic (human made) sedimentary like material specimens identified by the Rock Identifier community.
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Yellow Calcite
Calcite (Calcium Carbonate, CaCO3)
mineral
Amethyst Geode (Thunderegg)
Silicon Dioxide (SiO2) - Quartz Variety: Amethyst
mineral
Biotite (Black Mica)
Biotite (K(Mg,Fe++)3AlSi3O10(OH,F)2)
mineral
Sandstone (likely Arkosic)
Clastic Sedimentary Rock
sedimentary
Iron-Nickel Meteorite fragment
Siderite (meteoritic iron), composed primarily of Kamacite (α-(Fe,Ni)) and Taenite (γ-(Fe,Ni))
mineral
Native Copper
Native Copper (Cu)
mineral
Shale or Argillite
Shale (fine-grained clastic sedimentary rock) or Argillite (low-grade metamorphic rock derived from shale)
Sedimentary or Metamorphic (low grade)
Muscovite Mica (in Quartz matrix)
Potassium aluminum silicate hydroxide fluoride (KAl2(AlSi3O10)(F,OH)2)
mineral
Sandstone (Micaceous)
Arenite (composed primarily of SiO2)
sedimentary
Blue Lace Agate
Silicon Dioxide (SiO₂), a variety of Chalcedony
mineral
Lapis Lazuli
Lapis Lazuli (Complex silicate rock containing Lazurite (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2, Pyrite, and Calcite)
metamorphic
Thunderegg (specifically a Jasper/Agate-filled Geode nodule)
Silicon Dioxide (SiO2) within Rhyolitic Matrix
igneous
Jasper (Red Jasper)
Silicon Dioxide (SiO₂)
sedimentary
Jasper with Hematite Inclusions
Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3)
sedimentary
Quartz Geode
Silicon Dioxide (SiO2) within a geode
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
sedimentary
Granite
Granitic intrusive igneous rock
igneous
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Pyrite
Iron Disulfide (FeS2)
mineral
Rough Diamond
Native Carbon (C)
mineral
Nuummite
Nuummite (complex silicate composed of Anthophyllite and Gedrite, (Mg,Fe)7Si8O22(OH)2)
metamorphic
Diamond (Green tinted)
Carbon (C) with trace impurities or lattice defects
mineral
Diamond
Carbon (C)
mineral
Pink Garnet (likely Almandine or Rhodolite)
Garnet Group (Fe3Al2(SiO4)3 to Mg3Al2(SiO4)3)
mineral
Nuummite
Nuummite (ortho-amphibole rock)
metamorphic
Tektite (specifically Indochinite)
Tektite (Natural silica glass)
Mineraloid (Impact glass)
Desert Varnish (on Sandstone)
Rock Varnish (composed of Manganese oxides, Iron oxides, and Clay minerals)
sedimentary
Olivine (Peridotite)
Olivine Group; (Mg, Fe)2SiO4
igneous
Red Sandstone
Arenite (Ferruginous Sandstone)
sedimentary
Zebra Jasper (Zebra Stone)
Tumbled Silicon Dioxide (SiO2) with impurities
sedimentary
Quartz
Quartz (SiO2 - Silicon Dioxide)
Mineral
Mica Schist
Mica Schist (predominantly composed of Muscovite or Biotite silicates)
metamorphic
Jasper and Quartz River Pebble
Silicon Dioxide (SiO2) with impurities
sedimentary
Synthetic Sapphire and Ion-X Glass
Single-crystal Alumina (Al2O3) and Ion-strengthened Aluminosilicate Glass
mineral
Geode (unopened) or Calcareous Nodule
Siliceous or Calcareous Concretion/Nodule
sedimentary
Shale with Vein Infillings
Shale (a fine-grained clastic sedimentary rock). The veins could be Calcite (CaCO3), Quartz (SiO2), or other minerals.
Sedimentary Rock
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Chert (Flint)
Chert (predominantly SiO₂ - silicon dioxide)
sedimentary
Yellow Quartzite (Iron-Stained)
Quartzite (primarily SiO2 with iron oxide impurities)
metamorphic
Banded Agate
Agate (Cryptocrystalline variety of Silica, SiO2)
mineral