Brick fragment (Man-made material)
N/A (Fired clay)
man-made
Category
Mineral (Man Made Glass, Not Natural)
Browse mineral (man made glass, not natural) specimens identified by the Rock Identifier community.
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Goldstone (Red/Brown)
Aventurine Glass (SiO2 with Copper inclusions)
Mineral (Man-made glass)
Blue Goldstone
Aventurine Glass
man-made glass
Tumbled Clear Quartz/Rock Crystal
Silicon Dioxide (SiO2)
mineral
Blue Slag Glass
Man-made Silicon Dioxide (Amorphous)
Anthropogenic (Man-made)
Rainbow Hematite (Titanium Coated)
Iron(III) oxide (Fe2O3) with Titanium/Metal Oxide coating
mineral
Concrete
Anthropogenic Sedimentary Rock (Hydrated Calcium Silicate)
sedimentary (anthropogenic / man-made)
Cubic Zirconia (Jewelry Setting)
Cubic Zirconia (ZrO2)
gemstone
Aura Quartz
Titanium-coated Silicon Dioxide (SiO2)
mineral
Tumbled milky quartz
Quartz — silicon dioxide (SiO₂), cryptocrystalline or microcrystalline variety possible
mineral
Concrete
Anthropogenic Sedimentary Conglomerate (Cement mixture: typically Ca2SiO4, Ca3SiO5, Ca3Al2O6)
sedimentary (artificial)
Not a geological specimen
N/A (man-made object)
N/A
Slag
Metallurgical Slag
igneous
Blue opal heart cabochon
Common opal, hydrated amorphous silica (SiO₂·nH₂O), likely blue-dyed or synthetic opalite
gemstone
Titanium Coated Kyanite (Aura Kyanite)
Aluminosilicate (Al2SiO5) with a Titanium-Niobium vacuum-deposited coating
metamorphic
Blue Cracked Quartz (Dyed Fire Crackle Quartz)
Silicon Dioxide (SiO2) with synthetic dye
mineral
Cubic Zirconia (Man-made)
Cubic Zirconia (ZrO2) with Enamel and Metal Alloy
mineral
Porcelain (White Ceramic)
Mullite-bearing Vitrified Ceramic (Major phases: Mullite Al6Si2O13, Glassy Silica SiO2)
metamorphic
Concrete fragment with Aggregate
Anthropogenic Concrete with Calcarious and Siliceous Aggregate
sedimentary (anthropogenic/man-made)
Dyed Crackle Quartz (Green)
Quenching-treated Quartz (Silicon Dioxide, SiO2)
mineral
Quartz crystal fragment (likely milky quartz)
Quartz, silicon dioxide (SiO₂)
mineral
Aqua Aura Quartz
Silicon Dioxide (SiO2) bonded with Gold (Au)
mineral (treated)
Concrete / Anthropogenic Conglomerate
Man-made composite material (Portland cement, aggregate, and water)
not a natural rock
Slag Glass (Leland Blue variant)
Anthropogenic Vitreous Silicate
mineral
Green Quartz / Chrysoprase / Sea Glass
Silicon Dioxide (SiO2)
mineral
Goldstone (Brown)
Aventurine glass
mineraloid (man-made)
Quartzite (Engineered Stone)
Silicon Dioxide (SiO2) based synthetic composite
metamorphic
Cullet Glass (Man-made Glass Slag)
Amorphous Silica (SiO2) with chemical additives
Mineraloid
Blue-green cabochon, likely chalcedony or treated glass imitation
Cryptocrystalline quartz (chalcedony/possibly chrysoprase); identification uncertain from image
gemstone
Cubic Zirconia (Simulated Diamond)
Cubic Zirconia (ZrO2)
mineral
Metal Chain Belt with Square Plates
Not applicable (man-made)
Man-made Object (Metalwork)
Synthetic Resin / Plastic Figurine
Synthetic Polymer (Copolymer of Polyethylene or Resin)
Mineraloid-like Synthetic Material
Slag Glass
Amorphous Silicate (Man-made)
industrial byproduct
Clear Quartz Sphere (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Blue Goldstone
Man-made glass with crystalline copper/cobalt inclusions
mineral
Milky quartz
Quartz (silicon dioxide, SiO₂)
mineral
Baked-clay ceramic fragment (likely brick or pottery)
Fired clay, primarily aluminosilicate minerals; not a natural rock
sedimentary
Blue Slag Glass
Anthropogenic Amorphous Silicon Dioxide
mineral
Painted River Rock
Artificially Coated Sedimentary Rock
sedimentary
Man-made Synthetic Material (Plastic/Composite)
Acrylonitrile Butadiene Styrene (ABS) or High-Impact Polystyrene (HIPS)
Non-geological / Synthetic
Blue glassy mineral specimen, possibly dyed or synthetic
Uncertain; possible blue fluorite (CaF₂), dyed chalcedony, or man-made glass
mineral
Zinc Alloy (Silver-plated)
Zinc Alloy Casting (Zn-Al-Mg-Cu)
mineral (refined metal)