Diamond (in a jewelry setting)
Cubic Carbon (C)
mineral
Category
Anthropogenic (Man Made Product Subject To Geological Processes)
Browse anthropogenic (man made product subject to geological processes) specimens identified by the Rock Identifier community.
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Milky Quartz
Quartz (SiO2)
Mineral
Sandstone (likely Quartzose Sandstone)
Arenite
sedimentary
Opalite
Synthetic glass / Opalized glass
gemstone
Quartzite
Metamorphic Quartz Rock (SiO2)
metamorphic
Quartzite
Quartzite (Metamorphic rock composed primarily of quartz)
metamorphic
Quartzite Pebble
Metamorphosed Quartz Sandstone (SiO2)
metamorphic
Yellow Calcite
Calcite (Calcium Carbonate, CaCO3)
mineral
Fossiliferous Limestone (Coquina)
Biogenic Limestone (Calcium Carbonate, CaCO3)
sedimentary
Quartz Cluster
Silicon Dioxide (SiO2)
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Basalt
Basalt (extrusive igneous rock)
Igneous
Quartzite
Quartzite (Metamorphosed quartz sandstone)
metamorphic
Pearl
Aragonite (CaCO3) with Conchiolin
mineral
Diamond (in jewelry setting)
Carbon (C)
mineral
Quartzite
Metamorphic Quartz-rich Rock
metamorphic
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Quartz (Granular)
Silicon Dioxide (SiO2)
mineral
Lepidolite
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2
metamorphic
Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz River Cobble
Silicon Dioxide (SiO2)
mineral
Milky Quartz (Druzy Geode fragment)
Silicon Dioxide (SiO2)
mineral
Quartz Vein in Gneiss or Schist
Silicon dioxide (SiO2) within metamorphic host rock
metamorphic
Fluorite
Calcium Fluoride (CaF2)
mineral
Man-made Glass (Tumbled/Shaped)
Amorphous Silicon Dioxide (SiO2) with metal oxide colorants
Mineraloid (synthetic)
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Rhodonite
Manganese Inosilicate (Mn,Fe,Mg,Ca)SiO3
mineral
Polished greenstone pebble
Likely nephrite jade (tremolite–actinolite), though serpentine or greenstone is possible from appearance alone
metamorphic
Fossiliferous Limestone
Limestone (composed primarily of calcite with included fossils CaCO3)
Sedimentary
Quartz Boulder
Silicon Dioxide (SiO2)
mineral
Puddingstone (Jasper Conglomerate)
Conglomerate (specific type: Jasper Conglomerate or Hertfordshire Puddingstone)
Sedimentary
Chert (Grey-Green Flint)
Microcrystalline silicon dioxide (SiO2)
sedimentary
Quartz on Matrix
Silicon Dioxide (SiO2)
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Slate
Metamorphic pelitic rock
metamorphic
Weathered iron-rich rock (probable limonite/goethite)
Limonite: hydrated iron oxides, chiefly goethite (FeO(OH)) and hematite (Fe₂O₃)
mineral
Quartzite
Metamorphic rock composed primarily of quartz (SiO2)
metamorphic
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Sandstone
Arenite (composed primarily of Quartz: SiO2)
sedimentary
Honey Calcite
Calcite (Calcium Carbonate, CaCO3)
mineral