Fired Clay Brick (Anthropic Rock substitute)
Anthropogenic polycrystalline ceramic (predominantly Mullite and Quartz: Al6Si2O13 + SiO2)
metamorphic (man-made / anthropic)
Category
Man Made Material (Anthropogenic 'Mineraloid')
Browse man made material (anthropogenic 'mineraloid') specimens identified by the Rock Identifier community.
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Terrazzo (Synthetic Composite Rock)
Cementitious or Epoxy Resin-bound Aggregates
Man-made metamorphic-style composite
Slag
Ferrous Slag (Amorphous calcium-magnesium-aluminum silicates)
igneous (artificial/anthropogenic)
Chert (specifically Flint Arrowhead)
Silicon dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Man-made Glass (Tumbled/Shaped)
Amorphous Silicon Dioxide (SiO2) with metal oxide colorants
Mineraloid (synthetic)
Opalite
Synthetic Glass (Hydrated Crystalline Silicon Dioxide simulation)
mineral
Concrete Fragment
Hardened Portland Cement Composite
Anthropogenic (Man-made material mimicking sedimentary rock)
Asphalt Concrete
Bituminous Concrete / Asphaltic Composite
not a natural rock (man-made composite)
Synthetic Resin / Plastic Figurine
Synthetic Polymer (Copolymer of Polyethylene or Resin)
Mineraloid-like Synthetic Material
Fordite
Anthropogenic paint-rock
mineraloid (human-made geological specimen)
Rose Quartz and Cherry Quartz (Dyed Glass/Quartz)
Silicon Dioxide (SiO2) with inclusions/dye
gemstone
Opalite
Man-made synthetic glass with opalescent effects (SiO2 + metal oxides)
mineraloid
Ferro-silicate Slag
Industrial Vitrified Slag (High-silica amorphous glass)
Mineral byproduct (Anthropogenic)
Goldstone
Aventurine Glass (Man-made)
mineral
Cobalt Blue Slag Glass
Amorphous Silicon Dioxide (anthropogenic) with Cobalt additives
mineraloid
Goldstone
Aventurine glass (Synthetic glass with copper inclusions)
mineraloid / man-made glass
Opalite
Synthetic Fluorescent Glass (SiO2 + impurities)
mineraloid (synthetic)
Asphalt Chunk (with aggregate)
Bituminous concrete / Anthropogenic conglomerate
sedimentary (anthropogenic/man-made conglomerate)
Goldstone
Aventurine Glass (Man-made glass with copper inclusions)
mineraloid / man-made glass
Concrete with Aggregate
Composite construction material; primary matrix is Calcium Silicate Hydrate (C-S-H)
anthropogenic (human-made) sedimentary-like material
Metal Chain (Likely Steel or a Steel Alloy)
Steel (primarily iron and carbon); specific alloy unknown
Man-made Object (Metal/Alloy)
Blue crystal pendant (likely blue glass or synthetic crystal)
Not identifiable from the image; possibly synthetic quartz or glass, rather than a natural mineral
gemstone
Tumbled black obsidian (likely)
Volcanic glass; chiefly silica-rich rhyolitic glass (SiO₂)
igneous
Synthetic Resin Charm (Seal Shape)
Polymer Resin with plastic glitter / Polyethylene terephthalate glitters
Synthetic material (Not a rock or mineral)
Exposed Aggregate Concrete (Pea Gravel)
Concrete with Siliceous Alluvial Gravels
sedimentary (man-made conglomerate)
Ring with an Orange Inlay
N/A (Man-made object)
Man-made Object (Ring)
Not a geological specimen
N/A (man-made object)
N/A
Industrial Slag
Anthropogenic Vitreous Slag
igneous
Cobalt Glass Slug (Man-made Glass)
Amorphous Silica with Cobalt Oxide (SiO2 + CoO)
mineraloid
Asphalt (Road Aggregate)
Bituminous conglomerate
sedimentary
Asphalt Concrete
Bituminous conglomerate
sedimentary
Asphalt / Road Aggregate
Bituminous Conglomerate (synthetic)
sedimentary
Leland Blue Stone
Anthropogenic Iron Smelting Slag
mineraloid
Opalite
Synthetic Glass, SiO2 base with metallic inclusions
mineraloid (synthetic)
Green Sea Glass
Amorphous Silica (man-made glass), SiO2 + additive metal oxides
mineraloid / anthropogenic (man-made origin)
Concrete with Aggregate
Artificial Conglomerate (Cement and Aggregate)
sedimentary
Opalite
Synthetic Opalized Glass (SiO2 + additives)
mineraloid (man-made)
Blue Goldstone
Auraventurine (Synthetic glass with cobalt and copper inclusions)
Synthetic (Man-made Glass)
Opalite
Synthetic Opalised Glass
mineraloid (synthetic)
Iron Slag
Iron/Steel Slag (Ferrosilicate Glass)
industrial byproduct (anthropogenic material)
Blue-green faceted gemstone, possibly glass or synthetic material
Not identifiable from the image; possible synthetic spinel or glass
gemstone
Slag Glass / Industrial Slag
Anthropogenic Glass
man-made glass / industrial byproduct