Quartz Geode
Silicon Dioxide (SiO2)
mineral
Category
Anthropogenic Sedimentary Style Organic Solid
Browse anthropogenic sedimentary style organic solid specimens identified by the Rock Identifier community.
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Fired Clay Brick (Anthropic Rock substitute)
Anthropogenic polycrystalline ceramic (predominantly Mullite and Quartz: Al6Si2O13 + SiO2)
metamorphic (man-made / anthropic)
Amethyst Geode
Amethyst (Silicon Dioxide), Formula: SiO2
mineral
Quartz Geode
Silicon Dioxide (SiO2) in a concretion
sedimentary
Quartz Geode (Unbroken)
Silicon Dioxide (SiO2)
sedimentary
Yellow Aventurine (or Citrine-colored Quartz)
Silicon Dioxide (SiO2) with inclusions
metamorphic
Petrified Wood
Silicified Wood (primarily SiO2)
sedimentary
Grey Chalcedony (Tumbled Moon)
Microcrystalline Quartz (SiO2)
mineral
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Garnet Schist
Almandine Garnet-bearing Mica Schist
metamorphic
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Quartz Geode
Crystalline Silicon Dioxide (SiO2) within a geode structure
mineral
Agate Geode (Unopened)
Cryptocrystalline Quartz (SiO2) with Chalcedony
mineral
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Quartz Geode
Silicon Dioxide (SiO2) within a geode
mineral
Marcasite Concretion (Propeller/Sand Dollar shape)
Marcasite (FeS2)
mineral
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Belemnite Fossil
Belemnitella sp. (rostrum)
fossil
Pink Dyed Agate
Silicon Dioxide (SiO2) with artificial pigment
sedimentary
Quartz Geode (Cracked)
Quartz (Silicon Dioxide, SiO2)
sedimentary
Puddingstone
Polymictic Conglomerate
sedimentary
Jasper Conglomerate
Jasper-clast Conglomerate (SiO2)
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
sedimentary
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Anthracite coal
Anthracite; predominantly carbon (C), with minor macerals, ash, sulfur, and trace minerals
sedimentary
Pyrite
Iron Sulfide (FeS2)
mineral
Green Jasper
Silicon Dioxide (SiO2) with iron silicate inclusions
sedimentary
Coquina
Bioclastic Limestone (composed primarily of CaCO3)
sedimentary
Quartz Geode (Cracked)
Silicon Dioxide (SiO2)
mineral
Quartz Geode or Vuggy Quartz
Silicon Dioxide (SiO2)
mineral
Boulder Opal
Amorphous Hydrous Silica (SiO2·nH2O)
mineral
Quartz Geode
Silicon Dioxide (SiO2) within a sedimentary or volcanic shell
mineral
Black Onyx
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
mineral
Quartz Geode
Silicon Dioxide (SiO2)
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Hematite
Iron Oxide (Fe2O3)
mineral
Quartz Geode
Silicon Dioxide (SiO2)
Mineral/Sedimentary
Petrified Wood
Agatized or Silicified Wood (SiO2)
fossil
Amethyst Geode
Silicon Dioxide with trace inclusions of Iron (SiO2)
mineral
Milky Quartz Nodule / Geode precursor
Silicon Dioxide (SiO2)
mineral
Geode or Concretion
Silica-based Concretion / Quartz Geode
sedimentary