Porcelain (Stoneware Ceramic)
Mullite / Silica-glass composite (Al6Si2O13)
metamorphic (man-made)
Category
Metamorphic (Man Made
Browse metamorphic (man made specimens identified by the Rock Identifier community.
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Fired Clay Brick (Anthropic Rock substitute)
Anthropogenic polycrystalline ceramic (predominantly Mullite and Quartz: Al6Si2O13 + SiO2)
metamorphic (man-made / anthropic)
Clay Brick
Ceramic structural unit (Al2O3·2SiO2·2H2O as precursor)
metamorphic (man-made/anthropogenic)
Porcelain (Kaolin-based)
Alumina silicate ceramic (composed primarily of Kaolinite: Al2Si2O5(OH)4)
metamorphic (man-made/engineered)
N/A - Non-Geological Item
not a rock/mineral
Opalite
Synthetic glass / Opalized glass
gemstone
Unidentifiable Rock Fragment
Uncertain
Metal Chain Belt with Square Plates
Not applicable (man-made)
Man-made Object (Metalwork)
Synthetic Resin Charm (Seal Shape)
Polymer Resin with plastic glitter / Polyethylene terephthalate glitters
Synthetic material (Not a rock or mineral)
Rainbow Hematite Ring
Iron(III) oxide (Fe2O3) with thin-film coating
mineral
Tumbled Clear Quartz/Rock Crystal
Silicon Dioxide (SiO2)
mineral
Cullet Glass / Slag Glass
Amorphous silica glass
man-made glass / industrial byproduct
One Pound Coin (UK)
Nickel-Brass Alloy (Cu-Zn-Ni)
mineral
Porcelain (White Ceramic)
Mullite-bearing Vitrified Ceramic (Major phases: Mullite Al6Si2O13, Glassy Silica SiO2)
metamorphic
Milky quartz (likely)
Quartz, silicon dioxide (SiO₂)
mineral
Blue cabochon gemstone, likely synthetic glass or dyed stone
Indeterminate from image; possible glass, synthetic spinel, sodalite, or lapis lazuli
gemstone
Felsic Drill Core (likely Gneiss or Granite)
Felsic Metamorphic Rock (Gneissic profile)
metamorphic
Opalite
Synthetic glass / Opalized glass
gemstone
Diamond (or Simulant)
Carbon (C) or relevant simulant formula (e.g., ZrO2 for Cubic Zirconia)
gemstone
Polished blue glassy mineral specimen, likely sodalite or blue aventurine
Most consistent with sodalite (Na₈Al₆Si₆O₂₄Cl₂), though dyed quartzite or blue glass cannot be excluded from the photograph
mineral
Tumbled milky quartz
Quartz (SiO₂), cryptocrystalline-to-massive variety
mineral
Green Aventurine
Silicon Dioxide (SiO2) with inclusions of Fuchsite (K(Al,Cr)2AlSi3O10(OH)2)
metamorphic
Milky quartz
Quartz (silicon dioxide, SiO₂)
mineral
Not a geological specimen
N/A (man-made object)
N/A
Green Aventurine
SiO2 (Silicon Dioxide with Fuchsite inclusions)
mineral
ABS Plastic (Acrylonitrile Butadiene Styrene)
(C8H8)x·(C4H6)y·(C3H3N)z
Synthetic Polymer (Synthetic Material)
Tumbled milky quartz
Quartz — silicon dioxide (SiO₂), cryptocrystalline or microcrystalline variety possible
mineral
Tumbled milky quartz pebble
Quartz (silicon dioxide, SiO₂), opaque-to-translucent milky variety
mineral
White pebble, likely quartz or calcite
Indeterminate from image; possible microcrystalline quartz (SiO₂) or calcite (CaCO₃)
mineral
Likely clear quartz pebble or glassy quartz fragment
Quartz (silicon dioxide, SiO₂)
mineral
Opalite
Synthetic glass (SiO2 + impurities)
mineral
Diamond
Native Carbon (C)
gemstone
Dyed Agate
Chalcedony (SiO2)
mineral
Aura Quartz (Titanium/Rainbow Quartz)
SiO2 (Silicon Dioxide) with metallic coating
mineral
Rose Quartz and Cherry Quartz (Dyed Glass/Quartz)
Silicon Dioxide (SiO2) with inclusions/dye
gemstone
Green Aventurine
Silicon Dioxide (Quartz with Fuchsite inclusions), SiO2
metamorphic
Not a rock, mineral, or geological specimen
N/A
Opalite
Synthetic glass / Opaque silicious glass
gemstone
Tumbled milky quartz
Quartz, silicon dioxide (SiO₂)
mineral
Clear quartz fragment
Quartz (silicon dioxide, SiO₂)
mineral
Opalite
Man-made opalescent glass
gemstone
Opalite
Man-made opalized glass
mineral