Diamond (in Jewelry Setting)
Carbon (C)
gemstone
Category
Man Made Object (Metal Alloy)
Browse man made object (metal alloy) specimens identified by the Rock Identifier community.
Learn about Man Made Object (Metal Alloy) in the encyclopedia
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Native Copper (in coinage alloy)
Copper (Cu)
mineral
Silicon
Crystalline Silicon (Si)
mineral
Chakra Stone (Composite / Man-made Bonded Gemstones)
Composite of Quartz, Lapis Lazuli, Aventurine, Tiger's Eye, and Jasper (SiO2, (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2, etc.)
Combined Minerals / Metaphysical stones
Fossiliferous limestone with colonial coral
Calcite (CaCO₃) limestone containing fossil tabulate or rugose coral colonies
fossil
Tumbled milky quartz
Quartz, silicon dioxide (SiO₂)
mineral
Libyan Desert Glass
Tektite (high-silica impact glass), SiO2
mineral
Possible iron meteorite
Iron meteorite, likely kamacite–taenite alloy
meteorite
Asphalt Concrete (Bituminous Concrete)
Bituminous aggregate
sedimentary
Aquamarine
Beryllium aluminum silicate (Be3Al2Si6O18)
mineral
Pallasite Meteorite
Pallasite (Stony-iron meteorite; Fe-Ni alloy with (Mg,Fe)2SiO4 olivine)
Mineral/Extraterrestrial Rock
Ferrochrome Slag
Industrial Glassy Slag (Fe-Cr alloy byproduct)
Antropogenic (Man-made industrial byproduct)
White quartz pebble or chip
Quartz (silicon dioxide, SiO₂), possibly milky quartz
mineral
Unidentified translucent crystal/mineral fragment
Likely quartz (SiO₂), but visual identification is uncertain
mineral
Green Aventurine
Silicon Dioxide (Quartz with Fuchsite inclusions), SiO2
metamorphic
Concrete
Hydrated Portland Cement Aggregate Composite
Anthropogenic Sedimentary (Man-made)
Goldstone (Brown)
Aventurine Glass (Silicon Dioxide infused with Copper crystals)
mineraloid (man-made glass)
Green Quartz / Chrysoprase / Sea Glass
Silicon Dioxide (SiO2)
mineral
Conglomerate
Conglomerate (Sedimentary rock containing rounded clasts)
sedimentary
Possible iron meteorite fragment
Iron–nickel meteorite, likely kamacite–taenite alloy
meteorite
Iron meteorite (probable)
Fe–Ni metallic meteorite, commonly kamacite–taenite
meteorite
Vanadinite
Pb5(VO4)3Cl
mineral
Clear quartz fragment
Quartz (silicon dioxide, SiO₂)
mineral
Polished black pebble, likely basalt
Basalt, a fine-grained mafic volcanic rock composed mainly of plagioclase feldspar and pyroxene, commonly with olivine
igneous
Green cabochon gemstone, likely aventurine or dyed chalcedony
Indeterminate from image; possible quartz variety (SiO₂), including aventurine quartz or chalcedony
gemstone
Iron meteorite fragment (likely metallic meteorite)
Fe–Ni kamacite/taenite alloy; exact identification requires testing
meteorite
Anthracite coal
Anthracite; predominantly carbon (C), with minor macerals, ash, sulfur, and trace minerals
sedimentary
Diamond ring
Diamond, crystalline carbon (C)
gemstone
Native Gold Flake
Gold (Au)
mineral
Sea Glass (Frosted Glass)
Amorphous Silica (SiO2) with various metal oxide impurities
Man-made material (Anthro-lithic product)
Painted River Rock
Artificially Coated Sedimentary Rock
sedimentary
Opalite
Synthetic Opalised Glass
mineral
Dyed Agate
Chalcedony (SiO2)
mineral
Diamond in Kimberlite
Diamond (C in Kimberlite)
igneous
Clear quartz crystal
Quartz (silicon dioxide, SiO₂)
mineral
Aura Quartz / Rainbow Aura Quartz
Silicon Dioxide (SiO2) with metallic vapor coating
mineral
Magnetic Hematite (Man-made)
Iron Oxide (Fe2O3) with Barium-Strontium Ferrite
mineral
Decorative gemstone bracelet or jewelry
Unidentifiable from the blurred image; likely colored glass or synthetic stones, possibly mixed gemstone beads
gemstone
Concretion
Sedimentary Concretion (Ironstone / Calcite Concretion)
sedimentary
Conglomerate
Clastic Sedimentary Rock (Conglomerate)
sedimentary
Sandstone (with Liesegang rings or joints)
Clastic Sedimentary Rock (primarily Quartz with Iron Oxide cement)
sedimentary
Sandstone Concretion
Sedimentary Clastic Rock (Silicate-rich)
sedimentary