Cubic Zirconia (Jewelry Setting)
Zirconium Dioxide (ZrO2)
gemstone
Category
Mineral Based Human Made Alloy
Browse mineral based human made alloy specimens identified by the Rock Identifier community.
Learn about Mineral Based Human Made Alloy in the encyclopedia
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Tiger Shark Fossil Tooth
Galeocerdo cuvier (fossilized)
sedimentary
Lapis Lazuli
Complex metamorphic rock containing Lazurite ((Na,Ca)8(AlSiO4)6(SO4,S,Cl)2), Calcite, and Pyrite
metamorphic
Milky Quartz with Iron Staining
Silicon Dioxide (SiO2)
mineral
River Pebbles (Sandstone and Quartzite)
SiO2 (Quartz) dominated clastic rocks
sedimentary and metamorphic
Agate
Silicon Dioxide (SiO2) - variety: Chalcedony
mineral
Tumbled yellow jasper or serpentine
Jasper: microcrystalline quartz (SiO₂); possible serpentine: Mg₃Si₂O₅(OH)₄
mineral
Jasper
Silicon Dioxide (SiO2)
mineral
Halite (Rock Salt)
Sodium Chloride (NaCl)
mineral
Slag (Industrial By-product)
Anthropogenic Vitreous Silica/Iron Silicate
mineral
Chert (Nodule)
Chert (Cryptocrystalline Silica, SiO2)
sedimentary
Granite
Phaneritic Igneous Rock (composed primarily of Quartz SiO2, Alkali Feldspar, and Plagioclase)
igneous
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Yellow Ocher (Iron-rich Silt/Clay)
Goethite-rich Limonite (FeO(OH)qnH2O)
sedimentary
Sandstone
Arenite (Secondary classification based on grain size)
sedimentary
Chert (Cloudy Gray)
Silicon dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Chert (Flint)
Chert (SiO2)
sedimentary
Chert
Microcrystalline quartz (SiO2)
sedimentary
Chert (often called Flint in archaeological contexts)
Microcrystalline or cryptocrystalline Silica (SiO2)
sedimentary
Opalite
Man-made Glass (Synthetic Opalized Glass)
mineral
Chakra Stone Tower (Composite Multi-Mineral)
Crystalline Silicon Dioxide composite (SiO2) with various inclusions
mineral
Honey calcite specimen
Calcite (calcium carbonate, CaCO₃)
mineral
Tumbled gray feldspar-rich stone, possibly granite or quartzite
Indeterminate; likely quartz–feldspar aggregate, potentially fine-grained granite or quartzite
igneous
Chert (Jasper/Flint variety)
Microcrystalline Quartz (SiO2)
sedimentary
Sandstone
Sedimentary Rock (Quartz arenite / Lithic sandstone)
sedimentary
Blue Goldstone
Man-made glass with suspended copper, cobalt, or manganese particles
man-made glass
Fossil gastropod shell
Fossilized marine gastropod; exact genus/species requires locality and examination
fossil
Conglomerate
Polymictic Conglomerate
sedimentary
Bumble Bee Jasper
Calcite-bearing Volcanic Tuff (not a true Jasper)
sedimentary
Gravel and Pavement Aggregates
Unconsolidated rock fragments / detrital sediments
sedimentary
River Cobble (Quartzite or Gneiss)
Metamorphic crystalline rock (predominantly SiO2 based)
metamorphic
Granite
Phaneritic Plutonic Igneous Rock (composed of quartz, alkali feldspar, and plagioclase)
igneous
Man-made earbud charging case (Not a rock or mineral)
Acrylonitrile Butadiene Styrene (ABS) Plastic with electronic components
Synthetic/Man-made object
Chert (Jasper/Agate variety)
Microcrystalline quartz (SiO2)
sedimentary
Tumbled blue-gray stone, likely sodalite or dumortierite quartz
Most plausibly sodalite (Na₈Al₆Si₆O₂₄Cl₂); identification is uncertain from the image
mineral
Slickenside
Tectonic Fault Scarp Surface
metamorphic
Sandstone (with Limonite/Iron Staining)
Arenite (SiO2 based) with FeO(OH) staining
sedimentary
Polished granite sphere
Granite, chiefly quartz, alkali feldspar, and plagioclase with dark biotite/amphibole minerals
igneous
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Turquenite (Dyed Howlite)
Dyed Ca2B5SiO9(OH)5 (Calcium Borosilicate Hydroxide)
mineral
Tumbled Carnelian and Quartz Mix
Silicon Dioxide (SiO2) with iron oxide impurities
mineral
Diamond
Native Carbon (C)
mineral