Slag Glass (Cullet)
Amorphous Silica (man-made), primarily SiO2 with trace metal oxides
Mineraloid / Synthetic Glass
Category
Not A Natural Rock (Man Made Composite)
Browse not a natural rock (man made composite) specimens identified by the Rock Identifier community.
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Sandstone
Arenite (with iron oxide cement)
sedimentary
Chalk
Calcium carbonate (CaCO3)
sedimentary
Chalk
Calcium Carbonate (CaCO3)
sedimentary
Diamond
Carbon (C)
mineral
Ruby in Fuchsite (Composite/Stabilized)
Corundum (Al2O3) in Chromium-rich Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2)
metamorphic
Chert
Microcrystalline Quartz (SiO2)
sedimentary
Blue Slag Glass
Anthropogenic Amorphous Silicon Dioxide
mineral
Concrete with Aggregate
Artificial Conglomerate (Cement and Aggregate)
sedimentary
Polished blue-green glassy slag or coated mineral fragment
Most likely man-made colored glass/slag; exact composition cannot be determined visually
mineral
Diamond (or Diamond Simulant)
Carbon (C)
mineral
Blue slag glass or dyed glass-like industrial material
Amorphous silicate glass; likely copper-bearing blue slag, but possibly colored man-made glass
mineral
Blue Goldstone
Synthetic glass with cobalt and copper inclusions
man-made glass
Man-made Crystal (Lead Glass)
Lead oxide-doped Silica Glass (approx. SiO2 + PbO)
Mineraloid/Synthetic Material
Concretion with Geode Cavity
Ferruginous Sandstone Concretion with Quartz Center
sedimentary
Man-made Jewelry (Metal and Glass/Plastic)
Synthetic Alloy and Amorphous Solid (SiO2/Polymer)
not a rock
Blue Goldstone
Aventurine Glass
man-made glass
Bismuth Crystal
Bismuth (Bi)
mineral
Diamond (in a jewelry setting)
Diamond (Carbon, C)
mineral
Aura Quartz (Anomalously Coated Quartz)
Silicon Dioxide (SiO2) treated with vaporized metals
mineral
Cubic Zirconia
Cubic Zirconium Dioxide (ZrO2)
gemstone
Granite
Granite (phaneritic intrusive igneous rock consisting of quartz, feldspar, and mica)
igneous
Man-made earbud charging case (Not a rock or mineral)
Acrylonitrile Butadiene Styrene (ABS) Plastic with electronic components
Synthetic/Man-made object
Green Aventurine
Silicon Dioxide (SiO2) with inclusions of Fuchsite (K(Al,Cr)2AlSi3O10(OH)2)
metamorphic
Acrylic or Resin (Synthetic Imitation)
Polymethyl Methacrylate (PMMA) or Polyepoxide
Synthetic/Man-made Polymer
Green Sea Glass
Man-made silicate glass (weathered)
sedimentary
Tektite
Natural impact glass
meteorite
Green Aventurine
SiO2 (Silicon Dioxide with Fuchsite inclusions)
mineral
Slag
Anthropogenic glassy silicate
Mineral-like byproduct
Pink Anthracite Coal (dyed)
Anthracite Coal (Artificially Colored)
Sedimentary Rock (Altered)
Eroded Brick or Pumice-like Scoria
Vesicular Basalt / Scoria (Anthropogenic variant: Eroded Firebrick)
igneous
Goldstone
Avventurina (Cu + SiO2 glass)
mineral
Polymictic breccia, possibly volcanic breccia
Polymictic clastic breccia; likely a matrix-supported breccia containing lithic fragments, quartz, feldspar, and dark mafic minerals
sedimentary
Diamond (in a cluster setting)
Crystallized Carbon (C)
mineral
Ruby in Zoisite
Anyolite (composite of Corundum and Zoisite)
metamorphic
Jewelry Chain with Blue and Clear Gemstones (Likely Cubic Zirconia)
Cubic Zirconia (ZrO₂), Silver or White Gold/Platinum Alloy
Mineral (synthetic) and Metal (precious/base)
Goldstone (Red)
Aventurine Glass
Man-made material (Simulated Mineral)
Sandstone
Arenite (SiO2 based)
sedimentary
Diamond in Kimberlite
Diamond (C in Kimberlite)
igneous
Sandstone Pebble
Ferruginous Sandstone (SiO2 with Fe2O3)
sedimentary
Sandstone (Ferruginous)
Arenite (SiO2 with Fe2O3 inclusions)
sedimentary
Granite
Phaneritic Plutonic Felsic Rock (SiO2, KAlSi3O8, NaAlSi3O8, CaAl2Si2O8)
igneous