Banded Sandstone (Liesegang Rings)
Sedimentary sandstone with Iron oxide precipitates
sedimentary
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.
Quartz Geode
Silicon Dioxide (SiO2) in Geode form
sedimentary
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Fluorite (Blue)
Calcium Fluoride (CaF2)
mineral
Freshwater Pearl
Aragonite / Biogenic Calcium Carbonate (CaCO3)
mineral
Quartzite
Quartzite (SiO2)
metamorphic
Clear Quartz
Silicon dioxide (SiO2)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Ferruginous Quartz
Silicon Dioxide (SiO2) with Hematite (Fe2O3) inclusions
mineral
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
mineral
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Quartzite
Quartzite (mostly SiO2)
metamorphic
Satin Spar (Selenite)
Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O
mineral
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Chalcedony (River Stone)
Microcrystalline Quartz (SiO2)
mineral
Fluorite
Fluorite (Calcium Fluoride, CaF2)
mineral
Jasper
Silicon dioxide (SiO2)
sedimentary
Pink Calcite (Mangano Calcite)
Calcium Carbonate (CaCO3)
mineral
Quartzite
Quartzite (primarily SiO2)
metamorphic
White Quartz
Silicon Dioxide (SiO2)
mineral
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Granodiorite
Granodiorite (phaneritic intrusive igneous rock)
igneous
Quartz (Milky or Common variety)
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
Mineral
Moss Agate
Silicon Dioxide with inclusions (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Sandstone
Arenite (SiO2 based with mineral cement)
sedimentary
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Quartz (Milky or Common Quartz)
Silicon Dioxide (SiO2)
mineral
Sandstone Cobble with Liesegang Rings
Arenite with iron oxide precipitation (SiO2 matrix with Fe2O3 banding)
sedimentary
Quartz (Milky or Grainy Variety)
Silicon Dioxide (SiO2)
mineral
Red Jasper (Chert)
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Fossiliferous Limestone (with Crinoids)
CaCO3 (Calcium Carbonate)
sedimentary
Nephrite Jade
Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2), a variety of Actinolite-Tremolite
metamorphic
Obsidian
Amorphous Volcanic Glass (primarily SiO2)
igneous
Dyed Agate
Silicon Dioxide (SiO2) with artificial pigment
mineral
Galena
Lead Sulfide (PbS)
mineral
Orthoclase Feldspar
Potassium aluminum silicate (KAlSi3O8)
mineral
Sandstone Concretion
Ferruginous Sandstone Concretion (Primarily SiO2 with Iron Oxide cement)
sedimentary