Diamond (set in Gold)
Diamond (pure carbon, C)
mineral
Category
Industrial Byproduct (Anthropogenic Rock Like Material)
Browse industrial byproduct (anthropogenic rock like material) specimens identified by the Rock Identifier community.
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Pumice
Pumice (a highly vesicular volcanic glass)
igneous
Muscovite Mica Schist
Metamorphic rock rich in muscovite mica (KAl2(AlSi3O10)(F,OH)2)
metamorphic
Limonite (Iron Ore)
Limonite (Hydrous iron(III) oxide-hydroxide mixture, FeO(OH)·nH2O)
mineral
Fossiliferous Limestone (Coquina / Shell Conglomerate)
Bioclastic Limestone (composed primarily of CaCO3)
sedimentary
Sandstone
Quartz Arenite / Sedimentary Rock
sedimentary
Chert (Jasper/Agate variety)
Microcrystalline quartz (SiO2)
sedimentary
Chert (often called Flint in dark varieties)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (Jasper variety)
Silicon Dioxide (SiO2)
sedimentary
Olivine in Basalt (Peridot)
Magnesium Iron Silicate (Mg,Fe)2SiO4 (Mineral) within Basalt (Rock)
igneous
Serpentine
Serpentinite (complex of Mg, Fe, Ni, Al, Zn, Mn)Si2O5(OH)4
metamorphic
Greenstone / Serpentinite
Serpentine-group / Altered Mafic Rock
metamorphic
Sandstone (Ferruginous)
Arenite (composed primarily of SiO2 with Fe2O3 cement)
sedimentary
Quartz (likely Milky Quartz)
Quartz (SiO₂ - Silicon Dioxide)
Mineral
Limonite (Yellow Ochre)
FeO(OH)·nH2O (Hydrous iron(III) oxide-hydroxide mixture)
Mineral (Iron Ore)
Conglomerate
Conglomerate (Sedimentary Clastic Rock)
sedimentary
Sandstone
Arenite (SiO2 primarily)
sedimentary
Basalt
Mafic Igneous Rock (composed primarily of plagioclase, pyroxene, and olivine)
igneous
Fossilized Shark Tooth
Chondrichthyes (class) fossilized tooth
fossil
Sandstone (with Iron Staining)
Clastic Sedimentary Rock (primarily Quartz, SiO2)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Schist
Schist (Metamorphic Rock)
metamorphic
Sandstone (likely Ferruginous)
Arenite (SiO2 based with Fe2O3/FeO(OH) cement)
sedimentary
Sandstone (with Iron Staining)
Clastic Sedimentary Rock (primarily SiO2 with FeO(OH) impurities)
sedimentary
Greenschist
Greenschist facies rock (containing chlorite, actinolite, and epidote)
metamorphic
Sandstone
Arenite (CaCO3/SiO2 cemented quartz)
sedimentary
Quartzite
Quartzite (composed primarily of SiO2)
metamorphic
Sandstone
Arenite (primarily composed of SiO2)
sedimentary
Fossil Coral
Rugosa or Tabulata coral fossil (Calcite/Silica replacement)
fossil
Chert (Nodule)
Chert (variety of microcrystalline quartz, SiO2)
sedimentary
Scoria (Lava Rock)
Scoria (basaltic pyroclastic rock)
igneous
Siltstone
Siltstone (primarily composed of quartz and clay minerals)
sedimentary
Sandstone
Arenite (SiO2 principal component)
sedimentary
Quartzite (with Iron Staining)
Metamorphosed Sandstone (mainly SiO2 with Fe2O3/FeOOH impurities)
metamorphic
Fossilized Oyster Shell
Exogyra or Ostrea (Gryphaeidae/Ostreidae family)
fossil
Conglomerate
Conglomerate (Clastic Sedimentary Rock)
sedimentary
Raw Corundum (Sapphire/Ruby variant)
Aluminum oxide (Al2O3)
mineral
Sandstone (Quartzite-leaning)
Arenite (primarily SiO2)
sedimentary
Granite
Phaneritic plutonic felsic rock
igneous
Quartzite Pebble
Quartzite (primarily SiO2)
metamorphic
Flowerstone
Porphyritic Basalt or Porphyritic Andesite
igneous
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary