Bismuth
Bismuth (Bi)
mineral
Category
Man Made Material (Jewelry, Metal Alloy)
Browse man made material (jewelry, metal alloy) specimens identified by the Rock Identifier community.
Learn about Man Made Material (Jewelry, Metal Alloy) in the encyclopedia
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Terrazzo (with Marble and Granite fragments)
Cementitious or resinous composite containing Calcium Carbonate (CaCO3) and Silicates
sedimentary (man-made composite)
Dyed Dragon Vein Agate
Silicon Dioxide (SiO2) with artificial pigment
mineral
United States Quarter Dollar
Cupronickel Clad Alloy (75% Copper, 25% Nickel over a 100% Copper core)
Metal / Man-made mineral-like object
Slag (Industrial Glass)
Artificial Vitreous Silicate
mineraloid (anthropogenic)
Man-made Ceramic / Clay Figurine
Aluminosilicate Ceramic (Processed Clay)
Synthetic (not a rock or mineral)
Blue cabochon gemstone, likely sapphire
Corundum (Al₂O₃), blue variety colored mainly by iron and titanium
gemstone
Titanium Aura Quartz (Aura Quartz)
Titanium-coated Silicon Dioxide (SiO2)
mineral
Iron Meteorite
Siderite (Iron-Nickel alloy)
meteorite
Slag (Industrial Glassy Byproduct)
Anthropogenic silicate byproduct (Slag)
Mineral-like byproduct (often mistaken for igneous rock or meteorite)
Aura Quartz Bead
Silicon dioxide (SiO2) with metal coating
mineral with artificial coating
Sea Glass
Amorphous Silicon Dioxide (Man-made glass weathered by nature)
mineral
Buffalo Nickel (Indian Head Nickel)
Cupronickel (75% Copper, 25% Nickel)
mineral (processed alloy)
Slag (Industrial)
N/A (Anthropogenic Slag)
industrial by-product
Faceted blue gemstone, likely blue topaz or synthetic spinel
Topaz (Al₂SiO₄(F,OH)₂) or synthetic spinel (MgAl₂O₄); image insufficient for certainty
gemstone
Fluorite (Polished Point/Tower)
Calcium Fluoride (CaF2)
mineral
Diamond
Diamond (C)
mineral
Green cabochon gemstone pendant
Indeterminate; likely dyed green turquoise, chrysoprase, or opaque beryl set with blue/clear accent stones
gemstone
Olivine
(Mg,Fe)2SiO4
mineral
Quartzite Pebble
Quartzite (SiO2)
metamorphic
Sandstone Anvil / Nutting Stone
Quartzose Sandstone (Sedimentary Rock)
sedimentary
Quartzite (Engineered Stone)
Silicon Dioxide (SiO2) based synthetic composite
metamorphic
Chert Concretion (with typical hematite/limonite staining)
Sedimentary Concretion (SiO2 with FeO(OH)⋅nH2O)
sedimentary
Sandstone Concretion
Clastic Sedimentary Rock (primarily SiO2 with mineral cement)
sedimentary
Pyrite Concretion (Grapestone)
Iron Sulfide (FeS2) Concretion
sedimentary
Dyed Crackle Quartz
Silicon Dioxide (SiO2) with synthetic dye
mineral
Cullet Glass (Man-made Glass Slag)
Amorphous Silica (SiO2) with chemical additives
Mineraloid
Sea Glass
Amorphous silicon dioxide (Man-made glass weathered by nature)
mineral
Gold
Native Gold (Au)
mineral
Blue Goldstone
Aventurine Glass (SiO2 with Cobalt/Copper inclusions)
man-made glass
Slag (Industrial Glassy Byproduct)
Ferro-silicate Slag
Anthropogenic / Non-Natural
Chert or Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Limpets Shell / Fossil Specimen
Patellogastropoda (Class)
fossil
Diamond
Native Carbon (C)
gemstone
Man-made earbud charging case (Not a rock or mineral)
Acrylonitrile Butadiene Styrene (ABS) Plastic with electronic components
Synthetic/Man-made object
Conglomerate
Conglomerate Rock (Paraconglomerate)
sedimentary
Sandstone Concretion
Clastic sedimentary rock (primarily Quartz SiO2)
sedimentary
Celestite (Celestine)
Strontium sulfate (SrSO4)
mineral
Man-made Crystal (Lead Glass)
Lead oxide-doped Silica Glass (approx. SiO2 + PbO)
Mineraloid/Synthetic Material
Peridot (Olivine)
Magnesium Iron Silicate (Mg, Fe)2SiO4
mineral
Granite with Cupules / Bedrock Mortars
Granite (felsic intrusive plutonic rock)
igneous
Diamond
Carbon (C)
gemstone