Obsidian
Volcanic glass
igneous
Category
Mineraloid Like Synthetic Material
Browse mineraloid like synthetic material specimens identified by the Rock Identifier community.
Learn about Mineraloid Like Synthetic Material in the encyclopedia
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Snowflake Obsidian
Volcanic glass containing Spherulites (SiO2)
igneous
Man-made Green Quartz (Lab-grown or Treated)
Silicon Dioxide (SiO2) with artificial coloration
mineral
Concrete Paver (Artificial Cementitious Rock)
Hydrated Portland Cement Aggregate
Sedimentary (Synthetic)
Orange Sapphire
Corundum (Al2O3)
gemstone
Synthetic Resin Charm (Seal Shape)
Polymer Resin with plastic glitter / Polyethylene terephthalate glitters
Synthetic material (Not a rock or mineral)
Ruby
Corundum (Al2O3 with Chromium traces)
mineral
Synthetic Blue Aura Quartz
Silicon Dioxide (SiO2) with Metallic Infusion
mineral (synthetic/man-made coating)
Ferruginous Slag (Iron Smelting Byproduct)
Anthropogenic Vitreous Silicate (often containing Fayalite: Fe2SiO4)
Mineraloid/Anthropogenic (Technofossil)
Blue Sapphire
Corundum (Al2O3)
mineral
Aquamarine in Onyx / Blue Topaz Pendant
Beryl (Be₃Al₂Si₆O₁₈) or Topaz (Al₂SiO₄(F,OH)₂)
gemstone
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Diamond (or high-quality simulant like Cubic Zirconia)
Carbon (C) - Native Element
mineral
Pearl
Calcium Carbonate (Aragonite or Calcite) and Conchiolin
Mineraloid
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Acrylic or Resin (Synthetic Imitation)
Polymethyl Methacrylate (PMMA) or Polyepoxide
Synthetic/Man-made Polymer
Opalite
Synthetic Glass / Man-made Opal Simulant
gemstone
Fluorite
Calcium Fluoride (CaF2)
mineral
Cubic Zirconia (Simulated Diamond)
Cubic Zirconia (ZrO2)
mineral
Strawberry Quartz (Lepidocrosite/Hematite-Included Quartz)
Quartz (Silicon Dioxide) with Lepidocrosite or Hematite inclusions (SiO2 + Fe2O3 · nH2O)
mineral
Tumbled black stone, likely black obsidian
Obsidian — natural volcanic glass, primarily SiO₂
igneous
Obsidian
Obsidian (Amorphous volcanic glass, SiO2 with impurities)
igneous
Red Sandstone
Clastic Sedimentary Mineraloid (predominantly Quartz grains with Iron Oxide cement)
sedimentary
Blue Sapphire
Corundum (Al2O3)
gemstone
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Goldstone
Aventurine Glass (Man-made glass with copper inclusions)
mineraloid / man-made glass
Common Opal with Host Rock
Opal (Hydrated silica, SiO2·nH2O)
mineral
Carborundum (Silicon Carbide)
Silicon Carbide (SiC)
mineral (synthetic)
Obsidian
Obsidian (Volcanic Glass)
igneous
Diamond
Diamond (C)
gemstone
Blue chalcedony cabochon (probable)
Chalcedony, cryptocrystalline quartz; silicon dioxide (SiO₂)
gemstone
Tourmalinated Quartz
Crystalline Silicon Dioxide with Schorl inclusions (SiO2 + NaFe3Al6(BO3)3Si6O18(OH)4)
mineral
Blue Sapphire
Corundum (Al2O3) with traces of Iron and Titanium
mineral
Amber
Succinite (C10H16O)
Organic Mineraloid
Opalite
Man-made opalescent glass (SiO2 + metal oxides)
mineral (synthetic)
Black Obsidian
Volcanic glass
igneous
Fulgurite
Fulgurite (Lechatelierite)
metamorphic
Snowflake Obsidian
Volcanic Glass (spherulitic Obsidian) - SiO2 (with Cristobalite inclusions)
igneous
Diamond (Faceted)
Carbon (C)
gemstone
Blue Sapphire
Corundum (Al2O3)
mineral
Green glassy cabochon, likely dyed or synthetic material
Uncertain; possibly green obsidian, chrysoprase, or synthetic glass
gemstone
Red gemstone ring, likely garnet or synthetic ruby
Possibly almandine garnet (Fe₃Al₂(SiO₄)₃) or corundum/ruby (Al₂O₃); image alone cannot distinguish
gemstone