Quartz Pebble
Silicon Dioxide (SiO2)
Category
Browse not a rock (man made industrial metal) specimens identified by the Rock Identifier community.
Quartz Pebble
Silicon Dioxide (SiO2)
Slag (Industrial Glass)
Anthropogenic Vitreous Slag (Post-industrial byproduct)
Native Copper with Malachite/Oxide Coating
Native Copper (Cu)
Diamond (Faceted)
Carbon (C)
Cupronickel Coin
Copper-Nickel Alloy (typically 75% Cu, 25% Ni)
Green glassy mineral specimen, likely rough emerald or green fluorite
Tentatively beryl (Be₃Al₂Si₆O₁₈), emerald variety; synthetic/man-made glass cannot be excluded from the photograph
Pegmatite (Granitic Pegmatite)
Pegmatite (Quartz + Potassium Feldspar + Mica)
Iron Slag
Anthropogenic Iron oxide/Silicate composite
Diamond (set in a eternity ring band)
Carbon (C)
Gold
Native Gold (Au)
Granite
Intrusive Igneous Rock
Granite
Intrusive Igneous Rock
Granite
Intrusive Igneous Rock
Granite
Intrusive Igneous Rock
Quartzite
Quartzite (mostly SiO2)
Gold and Diamond Jewelry
Native Gold (Au) and Diamond (C)
Aquamarine
Beryl (Be3Al2Si6O18 with iron impurities)
Sea Glass
Amorphous silicon dioxide (Man-made glass weathered by nature)
Gold Nugget
Native Gold (Au)
Ironstone (Limonitic/Hematitic Sandstone)
Ferruginous sandstone (predominantly Fe2O3 and FeO(OH))
Quartzite Pebble
Quartzite (Silicon Dioxide, SiO2)
Quartzite Pebble
Quartzite (SiO2)
Sandstone
Arenite (SiO2, often with CaCO3 or Fe2O3 cement)
Manganese Nodule
Polymetallic Nodule (Hydrous manganese and iron oxides)
Native Copper
Copper (Cu)
Granite
Felsic intrusive igneous rock
Granite
Intrusive igneous rock
Diamond (in a jewelry setting)
Carbon (C)
Possible metallic meteorite or iron-rich mineral
Uncertain; visually compatible with an iron meteorite, metal-rich chondrite, or magnetite-bearing rock
Fired Clay Brick (Anthropic Rock substitute)
Anthropogenic polycrystalline ceramic (predominantly Mullite and Quartz: Al6Si2O13 + SiO2)
Granite
Intrusive Igneous Rock (composed primarily of quartz, alkali feldspar, and plagioclase)
Granite
Intrusive Igneous Rock
Granite
Felsic intrusive igneous rock
Granite
Felsic intrusive igneous rock
Rhyolite
Extrusive igneous rock (felsic)
Granite
Phaneritic Felsic Igneous Rock
Granite
Intrusive Igneous Rock
Granite
Felsic intrusive igneous rock
Carved Mottled Greenish-Yellow Crystal/Glass Object
Unknown; possibly a form of quartz (chalcedony/jadeite/nephrite) or glass/resin.
Blue Sapphire and Diamond (Set in Metal)
Corundum (Al2O3) and Diamond (C)
Tiger Iron
Tiger Iron (Composition: SiO2, Fe2O3, Fe3O4)
Diamond
Carbon (C)