Asphalt (Bituminous Concrete)
Bituminous mix / Anthropogenic conglomerate
man-made composite (lithified equivalent of sedimentary)
Category
Man Made Byproduct (Non Geological)
Browse man made byproduct (non geological) specimens identified by the Rock Identifier community.
United States Quarter Dollar
Cupronickel Clad Alloy (75% Copper, 25% Nickel over a 100% Copper core)
Metal / Man-made mineral-like object
Chert (or possibly Flint)
Chert (variant: Flint)
Sedimentary
Laterite
Laterite (no specific mineral formula as it's a rock type)
Sedimentary
Jade (Nephrite or Jadeite)
Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2) or Jadeite (Na(Al,Fe3+)Si2O6)
Metamorphic Rock / Mineral
Rose Quartz
Rose Quartz (SiO2)
Mineral
Slag (Industrial By-product)
Anthropogenic Vitreous Silica/Iron Silicate
mineral
Muscovite Mica
Muscovite (Potassium Aluminum Silicate Hydroxide Fluoride), KAl2(AlSi3O10)(OH,F)2
mineral
Muscovite Mica
Muscovite (KAl₂(AlSi₃O₁₀)(F,OH)₂))
Mineral
Banded Gneiss
Gneiss (pronounced "nice")
metamorphic
Shale or Mudstone (Based on appearance)
Shale (fine-grained, laminated fissile sedimentary rock) / Mudstone (fine-grained, non-fissile sedimentary rock)
Sedimentary
Bismuth
Bismuth (Bi)
Mineral
Pyrite
Pyrite (Iron sulfide, FeS₂)
mineral
Shale or Argillite
Shale (fine-grained clastic sedimentary rock) or Argillite (low-grade metamorphic rock derived from shale)
Sedimentary or Metamorphic (low grade)
Quartzite
Quartzite (primarily composed of SiO O₂)
Sedimentary Rock
Limonite (Iron Ore/Hydrated Iron Oxide)
Limonite (mixture of FeO(OH)·nH₂O minerals, mainly Goethite, FeO(OH) and Lepidocrocite, FeO(OH))
Mineral
Gold
Aurum (Elemental Gold, Au)
Mineral, Metal (element)
Glazed Ceramic Tile
Fused Silicate-Clay composite
Synthetic (Man-made material mimicking natural stone)
Serpentine
Serpentinite (a rock composed primarily of serpentine minerals like antigorite, chrysotile, and lizardite; general formula (Mg, Fe)3Si2O5(OH)4)
metamorphic
Baroque Pearl (and potentially a small Sapphire/Blue Topaz)
Pearl: Calcium Carbonate (aragonite or calcite) with conchiolin. Sapphire: Aluminum Oxide (Al2O3). Blue Topaz: Al2SiO4(F,OH)2.
Organic Gemstone (for pearl), Mineral (for sapphire/topaz)
Note: The image provided is a fabric sock, not a geological specimen.
Polyester-Cotton Blend with Elastane
Synthetic/Natural Fiber (Non-Geological)
Banded Gneiss
Gneiss (pronounced 'nice')
metamorphic
Dog (Sleeping)
Canis familiaris (or Canis lupus familiaris)
Organic/Biological
Chert (Arrowhead Debitage or Spall)
Silicon Dioxide (SiO₂)
sedimentary
Sodalite
Sodalite - Na8(Al6Si6O24)Cl2
Mineral
Iron Slag
Ferrous Slag (complex silicate and oxide byproduct)
industrial byproduct (anthropogenic)
Slag
Anthropogenic Vitrophyre (Iron or Smelting Slag)
Mineral-like byproduct
White Quartz Pebble (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Greasy Quartz (likely carved Milky Quartz or Aventurine)
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Sandstone
Arenite (SiO2 principal)
sedimentary
Sandstone
Arenite (SiO2 based with various mineral cements)
sedimentary
Dyed Agate
Silicon Dioxide (SiO2) with artificial pigment
mineral
Sandstone (Ferruginous)
Arenite (Fe2O3 stained)
sedimentary
Sandstone
Arenite (primarily SiO2 with trace Fe2O3)
sedimentary
Red Sandstone
Arenite (Ferruginous Sandstone)
sedimentary
Red Jasper (Chert)
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Calcite
Calcium Carbonate (CaCO3)
mineral