Megalodon Shark Tooth
Otodus megalodon
fossil
Category
Sedimentary (Man Made Composite)
Browse sedimentary (man made composite) specimens identified by the Rock Identifier community.
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Pyrite
Iron Sulfide (FeS2)
mineral
Flint
Silicon Dioxide (SiO2) - Chert variety
sedimentary
Likely polished leopard-skin jasper or brecciated jasper
Jasper, an opaque microcrystalline variety of quartz (SiO₂), with iron-oxide and other mineral inclusions; exact variety cannot be confirmed from the image alone
sedimentary
Diamond (or Diamond Simulant)
Carbon (C) or Cubic Zirconia (ZrO2)
gemstone
Seashell Fragment
Calcium carbonate (CaCO3) - primarily Aragonite or Calcite
fossil
Diamond (Cut Gemstone)
Carbon (C)
gemstone
Chert (specifically Yellow/Brown Chert or Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Obsidian
Volcanic glass (SiO2 - Silicon Dioxide)
igneous
Green Banded Chert (Agate/Jasper)
Silicon Dioxide (SiO2) with trace impurities of Chlorite or Glauconite
sedimentary
Chert (Flint variety)
Chert (Microcrystalline or Cryptocrystalline Quartz), SiO2
sedimentary
Diamond
Diamond (pure Carbon, C)
mineral
Basalt
Basalt (extrusive igneous rock)
Igneous
Slate
Metamorphic Pelitic Rock
metamorphic
Chert (Jasper/Flint variant)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Tiger Iron
Tiger Iron (Hematite, Red Jasper, and Chert/Tiger's Eye composite)
metamorphic
Tiger Iron
Tiger Iron (Hematite, Red Jasper, and Chert/Tiger's Eye composite)
metamorphic
Quartz
Silicon dioxide (SiO₂)
Mineral
Granodiorite
Phaneritic Plutonic Intermediate-Felsic Rock
igneous
Diamond
Carbon (C)
mineral
Blue Lace Agate
Chalcedony (SiO2) with trace inclusions
mineral
Obsidian
Volcanic Glass (Amorphous Silicon Dioxide)
igneous
Pearl
Biogenic CaCO3 (Aragonite and Calcite)
mineral
Chert (Flint variety)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Turquoise
Hydrous phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)
gemstone
Diabase (Dolerite)
Diabase / Dolerite
igneous
Goldstone (aventurine glass)
Synthetic copper-bearing soda-lime glass; commonly sold as red goldstone
gemstone
Land Snail Shell
Gastropoda (Calcium Carbonate, CaCO3)
fossil
Pearl (Biogenic Mineraloid)
Calcium carbonate (CaCO3) primarily as Aragonite
mineral
Granite
Plutonic Igneous Rock (composed typically of SiO2, Al2O3, K2O, Na2O, CaO)
igneous
Diamond
Diamond (pure Carbon, C)
mineral
US Penny
Cuprum (Copper: Cu) and Zincum (Zinc: Zn) Alloy
Man-made object (metal alloy)
Pyrite
Iron Disulfide (FeS2)
mineral
Lava Rock (Dyed)
Basalt / Volcanic scoria
igneous
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Marble
Marble (metamorphosed limestone or dolostone), primarily composed of calcite (CaCO3) or dolomite (CaMg(CO3)2)
metamorphic
Diamond (or Cubic Zirconia)
Carbon (C) or Zirconium Dioxide (ZrO2)
gemstone
Vesicular Basalt (or Scoria)
Vesicular Basalt
igneous
Pyrite
Iron Sulfide (FeS2)
mineral
Granite / Diorite (Granodiorite)
Granodiorite / Quartz Diorite
igneous
Granite
Phaneritic Plutonic Felsic Rock
igneous
Granite
Granite (Phaneritic igneous rock)
igneous