Granodiorite
Granodiorite (Quartz + Plagioclase + Alkali Feldspar + Biotite/Hornblende)
igneous
Category
Antropogenic Rock (Man Made)
Browse antropogenic rock (man made) specimens identified by the Rock Identifier community.
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Chert (Chalcedony/Agate)
Microcrystalline Quartz (SiO2)
sedimentary
Flint
Silicon dioxide (SiO2)
sedimentary
Likely tumbled epidote-bearing rock or green jasper
Epidote-group silicate, possibly in a jasper or serpentinite matrix
mineral
Diamond (or Diamond Simulant)
Carbon (C)
mineral
Diamond in Kimberlite
Diamond (C in Kimberlite)
igneous
Yooperlite (Syenite clast containing fluorescent Sodalite)
Sodalite-bearing Syenite
igneous
Diorite (River Pebble)
Intermediate plutonic igneous rock
igneous
Industrial Slag
Anthropogenic Vitreous Slag
igneous
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
metamorphic
Sandstone
Arenite (composed primarily of Quartz: SiO2)
sedimentary
Carved Stone Turtle
Carved Soapstone and Quartz
mineral
Concrete-like aggregate surface with embedded rock fragments
Anthropogenic concrete or exposed aggregate; not a natural rock specimen
sedimentary
Blue glass-like tumbled specimen
Most likely cobalt-blue slag glass or manufactured glass; not confidently identifiable as a natural mineral from the image
mineral
Greenstone
Metamorphic mafic rock (chlorite-actinolite-epidote schist)
metamorphic
Pink Granite
Intrusive Igneous Rock (high K-feldspar content)
igneous
Green glassy mineral specimen, likely rough emerald or green fluorite
Tentatively beryl (Be₃Al₂Si₆O₁₈), emerald variety; synthetic/man-made glass cannot be excluded from the photograph
mineral
Green Aventurine
Quartz (SiO2) with Fuchsite inclusions
Mineral
Chert (Flint)
Chert (Cryptocrystalline Silica, SiO2)
sedimentary
Tektite
Impactite (Natural Silicate Glass)
meteorite
Polished dendritic agate cabochon (likely agate or jasper)
Microcrystalline quartz, SiO₂, commonly chalcedony with iron-oxide inclusions
gemstone
Diamond (in jewelry setting)
Diamond (C - Carbon)
mineral
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Fossilized Shark Tooth (Fragment)
Elasmobranchii gen. et sp. indet. (Calcium Phosphate / Apatite fossil)
fossil
Likely smoky quartz pendant
Smoky quartz, silicon dioxide (SiO₂), quartz variety colored by irradiation-related defects
gemstone
Diorite
Intermediate plutonic igneous rock
igneous
White Marble
Recrystallized Calcite Rock (CaCO3)
metamorphic
Green Slag Glass
Cullet (Amorphous Silicon Dioxide with impurities)
Man-made rock-like material
Sandstone (likely Fossiliferous)
Arenite / Fossiliferous Sandstone (SiO2 composition)
sedimentary
Sandstone
Arenite
sedimentary
Basalt
Basalt (comprising Plagioclase feldspar, Pyroxene, and Olivine)
igneous
Chert (Nodule)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (or Flint)
Chert (cryptocrystalline quartz), SiO2
Sedimentary
Chert (varietal Flint)
Microcrystalline quartz (SiO2)
sedimentary
Slag
Ferrous Slag (Siliceous industrial waste)
Anthropogenic (Man-made industrial byproduct)
Likely weathered iron-rich rock or slag fragment
Uncertain; possibly limonite/goethite-rich material (FeO(OH)·nH₂O)
mineral
Chert (varietal Chalcedony or Flint)
Silicon dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Tumbled Gabbro
Gabbro (Mafic intrusive igneous rock)
igneous
Chert (Jasper type)
Microcrystalline Quartz (SiO2)
sedimentary
Ferruginous Sandstone (Ironstone)
Clastic Sedimentary Rock (composed of SiO2 with Fe2O3/FeO(OH) cement)
sedimentary
Porous limestone (likely fossiliferous or weathered limestone)
Calcite-rich limestone; chiefly calcium carbonate (CaCO₃)
sedimentary
Bauxite
Bauxite (Al(OH)3, γ-AlO(OH), and α-AlO(OH))
sedimentary