Fossil Shark Tooth (Cretaceous white shark type)
Squalicorax (commonly known as Crow Shark)
Category
Browse this appears to be a man made metallic object, likely jewelry, not a natural rock, mineral, or geological specimen. specimens identified by the Rock Identifier community.
Fossil Shark Tooth (Cretaceous white shark type)
Squalicorax (commonly known as Crow Shark)
Chert (Flint)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Chert (and Chert Flake)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Fancy Jasper
Chalcedony (cryptocrystalline quartz) with inclusions
Jasper with Quartz Vein
Silicon Dioxide (SiO2) with impurities
Granite
Granite (composed primarily of Quartz, Feldspar, and Mica)
Gold
Native Gold (Au)
Crushed Limestone Aggregate
Limestone (Calcium Carbonate, CaCO3)
Schist
Mica Schist (primarily consisting of muscovite, biotite, and quartz)
Peacock Ore
Bornite (Cu5FeS4)
Chert (and/or Siltstone River Pebble)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Rhodonite
Rhodonite (Mn,Fe,Mg,Ca)SiO3
Barite
Barium Sulfate (BaSO4)
Limonite (Ironstone Concretion)
Limonite (Hydrated iron(III) oxide-hydroxide, mixtures of FeO(OH)·nH2O)
Chert (Jasper/Common Chert Pebble)
Microcrystalline Quartz (SiO2)
Chert (Jasper variety)
Silicon Dioxide (SiO2)
Quartz (Iron-stained)
Silicon Dioxide (SiO2)
Chert (Jasper variety)
Silicon Dioxide (SiO2)
Rhodonite
Rhodonite (Mn2+SiO3)
Gold Nugget
Native Gold (Au)
Basalt (with possible Calcite/Quartz veining)
Afanitic Mafic Igneous Rock
Magnetite
Iron(II,III) oxide (Fe3O4)
Pink Granite (Water-worn Cobble)
Phaneritic Felsic Intrusive Igneous Rock
Turquoise
Turquoise (CuAl6(PO4)4(OH)8·4H2O)
Chert (Iron-stained)
Microcrystalline or cryptocrystalline Quartz (SiO2)
Chert (Jasper/Flint variety)
Silicon Dioxide (SiO2)
Banded Onyx (Green Onyx)
Banded Calcite or Travertine (CaCO3)
Quartz Pebble
Silicon Dioxide (SiO2)
Limonite / Ironstone Nodule
Limonite (Hydrated iron(III) oxide-hydroxide), FeO(OH)·nH2O
Amethyst
Silicon dioxide with iron impurities (SiO2:Fe3+)
Calcite
Calcium Carbonate (CaCO3)
Smoky Quartz
Smoky Quartz (SiO2)
Fossiliferous Limestone (Coral Fossil)
Scleractinian Coral in Calcium Carbonate (CaCO3)
Shale
Fissile Mudrock (Clay-rich Sedimentary Rock)
Iron Slag
Ferrous Slag (Industrial Byproduct)
Fluorite (Rainbow Fluorite Tower)
Fluorite (Calcium Fluoride, CaF2)
Rough Quartz (likely Milky or Smoky Quartz)
Silicon Dioxide (SiO2)
Granite
Felsic Plutonic Rock (Granite)
Basalt (Crushed Stone)
Basalt (Mafic Extrusive Igneous Rock)
Diabase (Greenstone)
Diabase or Dolerite
Banded Agate (with small Geode cavity)
Silicon Dioxide (SiO2) - Chalcedony variety
Quartz Pebble
Quartz (Silicon Dioxide, SiO2)