Diamond
Carbon (C)
Category
Browse mineral based human made alloy specimens identified by the Rock Identifier community.
Diamond
Carbon (C)
Fossilized Shark Tooth (Fragment)
Elasmobranchii gen. et sp. indet. (Calcium Phosphate / Apatite fossil)
Magnetite (potentially Lodestone)
Magnetite (Iron(II,III) oxide, Fe3O4)
Megalodon Shark Tooth
Otodus megalodon
Sandstone Concretion
Clastic Sedimentary Rock (primarily SiO2 with mineral cement)
Chert (Flint nodule)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Chert (Jasper variety)
Silicon dioxide (SiO2)
Pearl (with Peridot)
Calcium carbonate (CaCO3) + Conchiolin; Peridot: Magnesium iron silicate (Mg, Fe)2SiO4
Specular Hematite (Specularite)
Iron Oxide (Fe2O3)
Limonite (Iron Ore)
Hydrated iron(III) oxide-hydroxide (FeO(OH)·nH2O)
Chert (Flint)
Chert (SiO2)
Chert (Flint)
Microcrystalline Quartz (SiO2)
Chert (Arrowhead Fragment)
Microcrystalline Quartz (SiO2)
Chert
Microcrystalline Quartz (SiO2)
Chert (Flint)
Microcrystalline Quartz (SiO2)
Chert
Chert (SiO2)
Chert (Jasper/Flint variety)
Microcrystalline Quartz (SiO2)
Chert (Jasper/Flint variety)
Microcrystalline quartz (SiO2)
Chert (specifically Brown Chert or Jasper)
Microcrystalline Quartz (SiO2)
Yellow Chert (Chert / Cryptocrystalline Quartz)
Silicon Dioxide (SiO2)
Chert (variations include Flint/Jasper)
Chert (Silicon Dioxide, SiO2)
Chert (Iron-stained)
Chert (Silicon Dioxide, SiO2)
Chert (Flint)
Chert (SiO2)
Chert (Jasper/Flint variety)
Silicon Dioxide (SiO2)
Chert (Jasper/Flint variety)
Microcrystalline Quartz (SiO2)
Diamond (Cut Gemstone)
Natural Carbon (C)
Granite
Phaneritic Plutonic Felsic Rock
Mahogany Obsidian
Volcanic glass containing Magnetite/Hematite
Opalite
Synthetic glass (SiO2 + metal additions)
Cubic Zirconia (Simulated Diamond)
Cubic Zirconia (ZrO2)
Opalite (a synthetic glass, often confused with Opal)
Silicon dioxide glass (SiO2nH2O, for natural opal)
Opalite (Man-made Glass)
Fused glass (typically made of dolomite and metal opacifiers)
Prehnite with Epidote
Prehnite (Ca2Al(AlSi3O10)(OH)2) with Epidote (Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH))
Schist
Mica Schist
Greenschist (Chlorite Schist)
Greenschist (containing Chlorite, Actinolite, and Epidote)
Dinosaur Bone
Agatized Dinosaur Bone
Basalt with Vesicular Amygdule
Extrusive igneous rock (Mafic)
Leopard Skin Jasper
Rhyolite (Silicon Dioxide with impurities), SiO2
Sandstone
Arenite (composed primarily of Quartz: SiO2)
Sandstone Concretion
Clastic sedimentary rock (primarily Quartz SiO2)
Quartzite Cobble / Quartz River Pebble
Silicon Dioxide (SiO2) - Quartzite / Quartz
Slag
Anthropogenic Vitreous Silica/Iron oxides