Opalite
Synthetic Glass (Simulated Opal)
gemstone
Category
Anthropogenic Specimen (Man Made)
Browse anthropogenic specimen (man made) specimens identified by the Rock Identifier community.
Learn about Anthropogenic Specimen (Man Made) in the encyclopedia
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Aura Quartz
Titanium or Gold bonded Silicon Dioxide (SiO2)
mineral
Bouncy Ball (Synthetic Rubber Polymer)
Polybutadiene / Ethylene Vinyl Acetate (EVA)
Synthetic material (Not a rock or mineral)
Blue Goldstone
Auraventurine (Synthetic glass with cobalt and copper inclusions)
Synthetic (Man-made Glass)
Man-made Synthetic Material (Plastic/Composite)
Acrylonitrile Butadiene Styrene (ABS) or High-Impact Polystyrene (HIPS)
Non-geological / Synthetic
Chert (often called Flint in archaeological contexts)
Microcrystalline or cryptocrystalline Silica (SiO2)
sedimentary
Opalite
Synthetic Opalized Glass
gemstone
Opalite
Synthetic Glass (Amorphized Silicon Dioxide)
mineraloid
Quartz (Engineered Stone Countertop)
Silicon Dioxide (SiO2) with polymer resins
Sedimentary-like (Industrial Composite)
Titanium Aura Quartz
Titanium-coated Silicon Dioxide (SiO2)
gemstone
Chert (Chalky Flint Node)
Chert (Microcrystalline Quartz, SiO2)
sedimentary
Possible weathered basalt or slag fragment
Basalt, chiefly plagioclase and pyroxene; identification is uncertain from the image
igneous
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Opalite Egg
Synthetic Glass (Simulated Opal)
mineral
Polymer Clay (Mock Mineral)
Polyvinyl chloride (PVC) with plasticizers and pigment
Synthetic material (Not a natural rock/mineral)
Concrete with Aggregate
Artificial Conglomerate (Cement and Aggregate)
sedimentary
Opalite
Opalescent Glass (SiO2 + coloring agents)
Mineral (Synthetic/Man-made)
Blue Goldstone
Synthetic glass with cobalt and copper inclusions
man-made glass
Cubic Zirconia (Jewelry Setting)
Cubic Zirconia (ZrO2)
gemstone
Dzi Bead (Etched Chalcedony)
Cryptocrystalline Quartz (SiO2) with chemical etching
mineral
Dragon's Breath (Mexican Opal Glass)
Artisan Foil Glass (SiO2 based)
mineraloid
Concrete fragment or Conglomerate
Artificial Conglomerate (Concrete) or Natural Conglomerate
sedimentary
Titanium Aura Quartz
Silicon Dioxide (SiO2) coated with Titanium and Niobium
mineral
Beads (likely glass or man-made material)
N/A (artificial material)
Man-made material, not a natural rock or mineral specimen
Libyan Desert Glass
Impact-melt silica glass (SiO2 + traces of Al, Fe, Ti)
mineral (Tektite/Impactite)
Green Sea Glass
Amorphous Silica (man-made glass), SiO2 + additive metal oxides
mineraloid / anthropogenic (man-made origin)
Chert (often called Flint)
Chert (Microcrystalline Quartz, SiO2)
sedimentary
Silicon Carbide (Carborundum)
Silicon Carbide (SiC) / Moissanite (natural)
mineral
Painted River Rock
Anthropogenic-modified Siliciclastic Sedimentary Rock
Sedimentary
Chert (Arrowhead Fragment)
Silicon Dioxide (SiO2)
sedimentary
Green Sea Glass
Man-made silicate glass (weathered)
sedimentary
Dalmatian Stone
Dalmatian Jasper (a misnomer for an Aplite with Arfvedsonite spots)
igneous
Ironstone Concretion (Pot Stone)
Siderite or Limonite Concretion (FeCO3 or FeO(OH)·nH2O)
sedimentary
Sea Glass
Amorphous silicon dioxide (man-made glass weathered by nature)
mineral
Asphalt Chunk (Bituminous Concrete)
Aggregated Bitumen / Artificial Breccia
sedimentary
Felsic Drill Core (likely Gneiss or Granite)
Felsic Metamorphic Rock (Gneissic profile)
metamorphic
Green Aventurine
Silicon Dioxide (SiO2) with inclusions of Fuchsite (K(Al,Cr)2AlSi3O10(OH)2)
metamorphic
Crackled Quartz (Dyed)
Silicon Dioxide (SiO2)
mineral
Engineerged Quartz (Quartz Composite)
SiO2 (Silicon Dioxide) in a polymer resin matrix
mineral
Porcelain (White Ceramic)
Mullite-bearing Vitrified Ceramic (Major phases: Mullite Al6Si2O13, Glassy Silica SiO2)
metamorphic
Chakra Stone Tower (Composite Multi-Mineral)
Crystalline Silicon Dioxide composite (SiO2) with various inclusions
mineral
Man-made Crystal (Lead Glass)
Lead oxide-doped Silica Glass (approx. SiO2 + PbO)
Mineraloid/Synthetic Material