Diamond ring
Diamond (crystalline carbon, C)
gemstone
Category
Man Made Material (Metal)
Browse man made material (metal) specimens identified by the Rock Identifier community.
Learn about Man Made Material (Metal) in the encyclopedia
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Diamond
Diamond (pure Carbon, C)
mineral
Coquina
Bioclastic Limestone (Coquina)
sedimentary
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Nugget of Native Silver
Native Silver (Ag)
mineral
Asphalt aggregate (crushed stone in bitumen)
Artificial composite; predominantly crushed granite, basalt, limestone, and/or recycled aggregate bound by bitumen
sedimentary
Chondrite Meteorite
Ordinary Chondrite (L or H group)
igneous
Red Granite
Intrusive Igneous Rock (Felsic)
igneous
Quartz Vein in Siltstone
Silicon Dioxide (SiO2) within Sedimentary/Metamorphic Matrix
metamorphic
Quartz crystal pendant
Quartz (silicon dioxide, SiO₂), likely rock crystal or milky quartz
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Chert (specifically Flint or Nodular Chert)
Silicon dioxide (SiO2)
sedimentary
Chert (Jasper/Flint var.)
Silicon Dioxide (SiO2)
sedimentary
Chert (often called Flint or River Stone)
Microcrystalline alpha-quartz (SiO2)
sedimentary
Chert (Chert / Flint Variety)
Microcrystalline / Cryptocrystalline Quartz (SiO2)
sedimentary
Amethyst, Aquamarine, and Pearl Ring
SiO2 (Amethyst), Be3Al2Si6O18 (Aquamarine), CaCO3 (Pearl)
gemstone
Diamond
Diamond (C)
mineral
Serpentinite
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4
metamorphic
Slag
Ferrous slag (by-product of iron smelting)
Mineraloid / Anthropogenic
Serpentinite
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4
metamorphic
Serpentine
Antigorite-Lizardite-Chrysotile (Mg3Si2O5(OH)4)
metamorphic
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz Vein in Host Rock
Silicon dioxide (SiO2) veins in metamorphic/igneous host rock
igneous
Copper-bearing Quartz (with Malachite and Iron Oxides)
Quartz (SiO2) with Malachite (Cu2CO3(OH)2) and Hematite/Limonite (Fe2O3)
Mineral Specimen
Red Sandstone (Iron-Rich)
Arenite (Fe2O3)
sedimentary
Blue cabochon gemstone, likely sapphire
Corundum (Al₂O₃), blue variety colored mainly by iron and titanium
gemstone
Sandstone (Ferruginous)
Arenite with Iron-Oxide Cement (primarily SiO2 with Fe2O3/FeOOH)
sedimentary
Slag (Industrial Byproduct)
Anthropogenic Vitreous Silicate material
igneous
Slag
Anthropogenic Vitrophyre (Iron or Smelting Slag)
Mineral-like byproduct
Quartz Vein on Matrix
Silicon Dioxide (SiO2)
mineral
Asphalt (Bituminous Concrete)
Bituminous Concrete / Pavement
man-made (synthetic rock)
Quartzite
Quartzite (SiO2)
metamorphic
Sandstone (Ferruginous)
Arenite with Iron-Oxide Cement
sedimentary
Diamond
Carbon (C)
mineral
Chert (often called Flint when dark or worked)
Cryptocrystalline silica (SiO2)
sedimentary
Asphalt Concrete
Bituminous Concrete / Asphaltic Composite
not a natural rock (man-made composite)
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Diamond
Native Carbon (C)
gemstone
Sandstone
Arenite (SiO2, often with CaCO3 or Fe2O3 cement)
sedimentary
Iron meteorite (probable)
Fe–Ni metallic meteorite, possibly an ordinary chondrite or iron-rich meteorite
meteorite