Opalite (Man-made Glass)
Synthetic Silicon Dioxide Glass (SiO2 + metal oxides)
Synthetic Mineral Simulant / Glass
Category
Man Made Object (Simulant)
Browse man made object (simulant) specimens identified by the Rock Identifier community.
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Malaysian 50 Sen Coin
Coinage (specific alloy unknown without metallurgical analysis, but typically brass or bronze for this denomination and era)
Man-made object (coin)
Carved Mottled Greenish-Yellow Crystal/Glass Object
Unknown; possibly a form of quartz (chalcedony/jadeite/nephrite) or glass/resin.
Man-made Object/Uncertain Mineral
Cullet Glass / Slag Glass
Amorphous silica glass
man-made glass / industrial byproduct
One Pound Coin (UK)
Nickel-Brass Alloy (Cu-Zn-Ni)
mineral
Sea Glass
Man-made silicate glass weathering product
sedimentary
Man-made Jewelry Charm (Enameled Metal)
Not a natural mineral; composed of base metal alloy (likely zinc or brass) and epoxy resin/enamel.
Synthetic / Manufactured Artifact
Diamond (or Diamond Simulant)
Carbon (C) or Cubic Zirconia (ZrO2)
gemstone
Diamond (or Cubic Zirconia simulant)
Carbon (C) - Diamond / Zirconium dioxide (ZrO2) - CZ
mineral
Polished brown jasper (likely brecciated or orbicular jasper)
Microcrystalline quartz/chalcedony, SiO₂, with iron-oxide and other mineral inclusions
gemstone
Opalite
Synthetic glass / Opalized glass
gemstone
ABS Plastic (Acrylonitrile Butadiene Styrene)
(C8H8)x·(C4H6)y·(C3H3N)z
Synthetic Polymer (Synthetic Material)
Diamond
Native Carbon (C)
gemstone
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)
Beads (likely glass or man-made material)
N/A (artificial material)
Man-made material, not a natural rock or mineral specimen
Man-made Metal Pin (Non-geological)
Antimony-Lead Alloy or Zinc/Brass Base with Electroplating
Metal Alloy / Manufactured Artifact
Rose Quartz and Cherry Quartz (Dyed Glass/Quartz)
Silicon Dioxide (SiO2) with inclusions/dye
gemstone
Chipped Glass/Plastic Fragment
Silicon dioxide (SiO2) for glass (amorphous) or various polymer compounds for plastic
Man-made material (simulant/artifact)
Sandstone Concretion
Clastic sedimentary rock (primarily Quartz SiO2)
sedimentary
Opalite
Synthetic glass / Opaque silicious glass
gemstone
Opalite crescent pendant
Opalite (man-made opalescent glass; not a natural mineral)
gemstone
Metal Chain (Likely Steel or a Steel Alloy)
Steel (primarily iron and carbon); specific alloy unknown
Man-made Object (Metal/Alloy)
Opalite
Synthetic Opalite Glass / Opalized Glass
gemstone
Concrete Fragment
Artificial Conglomerate (Cement and Aggregate)
sedimentary
Sea Glass
Silicon dioxide (mostly)
mineral
Orgonite Pyramid (containing Amethyst and mixed minerals)
Silicon Dioxide (SiO2) in synthetic resin
gemstone
Blue Apatite
Apatite (Calcium Phosphate) - Ca5(PO4)3(F,Cl,OH)
mineral
Yellow jasper or polished yellow chalcedony
Microcrystalline quartz, SiO₂, likely iron-stained jasper/chalcedony
mineral
Sea Glass
Amorphous Silicon Dioxide (Man-made glass weathered by nature)
mineral
Quartz pebble (Quartztite fragment)
Silicon Dioxide (SiO2)
mineral
Stainless Steel (Polished)
Ferrous Alloy containing Iron (Fe), Chromium (Cr), and Carbon (C)
Mineral equivalent / Metal Alloy
Note: Item is a Synthetic/Man-made Object
Titanium-coated Stainless Steel (Fe-Cr-Ni-Ti)
Non-geological
Opalite
Man-made opalescent glass
gemstone
Exposed Aggregate Concrete (Pea Gravel)
Concrete with Siliceous Alluvial Gravels
sedimentary (man-made conglomerate)
Chert (Arrowheads)
Microcrystalline Quartz (SiO2)
sedimentary
Concrete Fragment
Hardened Portland cement and mineral aggregate
sedimentary (anthropogenic)
Diamond (or Diamond Simulant)
Carbon (C)
mineral
Colorless faceted gemstone (likely cubic zirconia)
Cubic zirconia, ZrO₂ (synthetic zirconium dioxide); possibly synthetic glass or lab-grown diamond
gemstone
Sea Glass
Man-made silicate glass
gemstone
Opalite
Man-made opalized glass
mineral
Goldstone
Aventurine Glass (Man-made)
mineral
Slag Glass
Amorphous Silicate (Man-made)
industrial byproduct