Pyrite
Pyrite (Iron Disulfide), FeS2
Mineral
Category
Man Made Composite (Lithified Equivalent Of Sedimentary)
Browse man made composite (lithified equivalent of sedimentary) specimens identified by the Rock Identifier community.
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Dalmatian Stone
Peralkaline Quartz-Feldspar Rock
igneous
Turquoise (beads)
Turquoise; CuAl6(PO4)4(OH)8·4H2O
Mineral
Granite Pebble
Granite
igneous
Sandstone
Arenite (primarily SiO2)
sedimentary
Quartz (likely milky quartz or a stained variety)
Silicon Dioxide (SiO₂)
Mineral
Diamond
Carbon (C)
gemstone
Diamond
Carbon (C)
mineral
Quartz (beads)
SiO2 (Silicon Dioxide)
Mineral
Peridotite (Dunite)
Olivine-rich Peridotite ((Mg,Fe)2SiO4)
igneous
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Diamond
Diamond (pure Carbon, C)
mineral
Sandstone
Sandstone (Clastic Sedimentary Rock)
Sedimentary Rock
Lapis lazuli and green-blue chalcedony jewelry
Lapis lazuli: lazurite-bearing metamorphic rock, chiefly lazurite (Na₃Ca(Al₃Si₃O₁₂)S) with calcite and pyrite; second stone: likely chrysoprase or green-blue chalcedony (microcrystalline quartz, SiO₂)
gemstone
Sandstone
Arenite (SiO2 primarily)
sedimentary
Fossil Shark Tooth
Carcharodon carcharias (modern/recent) or similar Lamniform fossil
fossil
Diamond
Carbon (C)
gemstone
Banded Agate / Shell Fossil Fragment
Silicon Dioxide (SiO2) / Calcium Carbonate (CaCO3)
sedimentary
Diamond
Carbon (C)
gemstone
Sandstone (Ferruginous)
Arenite (SiO2 with Fe2O3/FeO(OH) cement)
sedimentary
Sandstone (likely Greywacke variant)
Arenite
sedimentary
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Likely weathered gray stone or chert fragment
Uncertain; possibly microcrystalline quartz (SiO₂)-rich chert
sedimentary
Iron Ore / Ironstone Concretion
Mixture of iron oxide/hydroxide minerals, likely some combination of Hematite (Fe2O3), Goethite (α-FeOOH), and Limonite (a general term for hydrated iron oxides of variable composition) or potentially Bauxite (a mixture of aluminum hydroxides, often with iron oxides, (Al(OH)3) and FeO(OH)). The visual characteristics strongly suggest iron-rich material.
Mineral, specifically an iron ore
Sandstone
Arenite (composed mainly of SiO2)
sedimentary
Vesicular basalt (likely weathered lava rock)
Vesicular basalt; primarily plagioclase feldspar, pyroxene, and volcanic glass, with possible iron-oxide alteration
igneous
Quartz with Iron Stains
Quartz (SiO2) with iron oxide/hydroxide staining
Mineral
Limestone
Sedimentary rock composed mainly of calcite (CaCO3)
sedimentary
Limestone
Sedimentary rock primarily composed of Calcite (CaCO3)
sedimentary
Limestone
Sedimentary rock composed primarily of Calcite (CaCO3)
sedimentary
Sandstone (Quartzose Sandstone)
Clastic Sedimentary Rock (composed mostly of SiO2)
sedimentary
Conglomerate
Clastic sedimentary rock (composed mostly of SiO2)
sedimentary
Sandstone (Gneissic or Banded)
Clastic Sedimentary Rock (composed predominantly of SiO2)
sedimentary
Flagstone (Sandstone)
Clastic Sedimentary Rock (composed of quartz and feldspar)
sedimentary
Sandstone
Sedimentary rock composed mainly of quartz sand
sedimentary
Limestone
Sedimentary rock composed mainly of calcite (CaCO3)
sedimentary
Shale
Sedimentary rock composed of clay minerals and quartz
sedimentary
Limestone
Sedimentary rock composed of Calcium Carbonate (CaCO3)
sedimentary
Sandstone (Pebble / Cobble)
Arenite / Sedimentary Rock (composed of quartz and feldspar)
sedimentary
Limestone
Sedimentary rock composed of Calcium Carbonate (CaCO3)
sedimentary
Limestone
Sedimentary rock composed of Calcium Carbonate (CaCO3)
sedimentary
Sandstone (with minor weathering/pitting)
Clastic Sedimentary Rock (composed mostly of SiO2)
sedimentary