Pet Rock (Man-made Quartzite or Granite Cobble)
Silicon dioxide (SiO2) mixture; commonly composed of Quartz, Feldspar, and Mica
igneous or metamorphic (base stone); anthropogenic (decoration)
Category
Antropogenic (Man Made Material)
Browse antropogenic (man made material) specimens identified by the Rock Identifier community.
Learn about Antropogenic (Man Made Material) in the encyclopedia
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Blue Goldstone
Synthetic glass with copper or cobalt/manganese inclusions
man-made glass
Aventurine
Quartz containing inclusions of Fuchsite (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)
metamorphic
Diamond
Native Carbon (C)
gemstone
Cubic Zirconia (Man-made)
Cubic Zirconia (ZrO2) with Enamel and Metal Alloy
mineral
Blue Apatite
Apatite (Calcium Phosphate) - Ca5(PO4)3(F,Cl,OH)
mineral
Titanium Aura Quartz (Aura Quartz)
Titanium-coated Silicon Dioxide (SiO2)
mineral
Chert (Flint)
Silicon dioxide (SiO2)
sedimentary
Man-made Jewelry (Metal and Glass/Plastic)
Synthetic Alloy and Amorphous Solid (SiO2/Polymer)
not a rock
Moissanite
Silicon Carbide (SiC)
mineral
Dyed Crackle Quartz
Silicon Dioxide (SiO2) with synthetic dye
mineral
Dyed Dragon Vein Agate
Silicon Dioxide (SiO2) with artificial pigment
mineral
Slate
Metamorphic Pelitic Rock
metamorphic
Libyan Desert Glass
Impact-melt silica glass (SiO2 + traces of Al, Fe, Ti)
mineral (Tektite/Impactite)
Sea Glass
Amorphous Silicon Dioxide (Man-made glass weathered by nature)
mineral
Polished blue calcite sphere (tentative identification)
Calcite, CaCO₃; blue color generally results from trace impurities or inclusions
mineral
Terracotta (Man-made ceramic brick fragment)
Baked clay / High-iron ceramic (Silicate-based ceramic)
Anthropogenic material (Man-made sedimentary mimic)
Blue Goldstone
Synthetic Aventurescent Glass (Cobalt-doped soda-lime glass)
man-made glass
Chert (Arrowhead/Artifact Fragment)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Ferrosilicon Slag (Industrial Vitrified Glass)
Vitreous Silicate Residue
Antropogenic (Man-made industrial byproduct)
Sea Glass
Amorphous silicon dioxide (Man-made glass weathered by nature)
mineral
Diamond
Native Carbon (C)
mineral
Asphalt Concrete
Bituminous Concrete / Asphaltic Composite
not a natural rock (man-made composite)
Chert (White Chert/Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (variations include Flint)
Microcrystalline or cryptocrystalline Quartz (SiO2)
sedimentary
Blue Slag Glass
Amorphous Silica (Industrial byproduct)
Antropogenic (Man-made glass byproduct)
Ferruginous Slag (Iron Smelting Byproduct)
Fused Silicate Scoria (Amorphous mixture of FeO, SiO2, and CaO)
Antropogenic Glass / Mineraloid
Blue Goldstone
Aventurine Glass (SiO2 with Cobalt/Copper inclusions)
man-made glass
Jasper / Chert (Red)
Cryptocrystalline quartz (SiO2)
Sedimentary / Mineral
Dyed Quartz Geode
Silicon Dioxide (SiO2) with artificial pigment
mineral
Coquina
Biogenic Limestone (Calcium Carbonate, CaCO3)
sedimentary
Clay Brick
Ceramic structural unit (Al2O3·2SiO2·2H2O as precursor)
metamorphic (man-made/anthropogenic)
Ruby in Matrix
Corundum (Al2O3)
mineral
Coquina (Fossiliferous Limestone)
Biogenic Limestone (Calcium Carbonate, CaCO3)
sedimentary
Slate
Metamorphic Pelitic Rock
metamorphic
Chert (Jasper/Flint variety)
Silicon Dioxide (SiO2)
sedimentary
Chert or Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Exposed aggregate concrete (stone-chip surface)
Portland-cement concrete containing natural aggregate; not a natural rock
sedimentary
Coquina
Bioclastic Limestone
sedimentary
Limpets Shell / Fossil Specimen
Patellogastropoda (Class)
fossil
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary