Opalite
Synthetic Glass (Hydrated Crystalline Silicon Dioxide simulation)
mineral
Category
Synthetic Polymer (Synthetic Material)
Browse synthetic polymer (synthetic material) specimens identified by the Rock Identifier community.
Learn about Synthetic Polymer (Synthetic Material) in the encyclopedia
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Fursuit (Synthetic Fur Specimen)
Canis anthropomorphus syntheticus
Anthropomorphic Textile Construct
Polished blue chalcedony or glass-like quartz specimen
Chalcedony (microcrystalline SiO₂), possibly treated or synthetic; exact identification requires testing
gemstone
Rough Emerald (Beryl)
Emerald (Be3Al2(SiO3)6 with Cr/V impurities)
mineral
Faceted red gemstone, likely garnet
Garnet group; probably almandine-pyrope solid solution, (Fe,Mg)₃Al₂(SiO₄)₃
gemstone
White Opal
Hydrated Amorphous Silica (SiO2·nH2O)
Mineraloid
Strawberry Quartz
Silicon Dioxide with Hematite inclusions (SiO2 + Fe2O3)
mineral
Chalcanthite
Copper(II) sulfate pentahydrate (CuSO4·5H2O)
mineral
Opalite
Man-made opalescent glass (SiO2 + metal oxides)
mineral (synthetic)
Faceted yellow gemstone ring
Likely yellow sapphire (corundum), but exact identification requires testing; alternatives include citrine, chrysoberyl, or treated diamond.
gemstone
Diamond
Carbon (C)
mineral
Jadeite and Mixed Gemstones (Ruby, Sapphire, Emerald)
Jadeite (NaAlSi2O6), Corundum (Al2O3), Beryl (Be3Al2(Si6O18))
mineral
Bismuth crystal
Bismuth (Bi), commonly laboratory-grown
mineral
Tiger’s-eye
Chatoyant quartz (SiO₂), commonly pseudomorphic quartz after crocidolite
mineral
Dalmatian Stone
Dalmatian Stone (Felsic Igneous Rock)
igneous
Sapphire (Blue)
Corundum (Al2O3)
mineral
White Sapphire
Corundum (Al2O3)
mineral
Carborundum (Silicon Carbide)
Silicon Carbide (SiC)
mineral (synthetic)
Blue quartz crystal (likely synthetic or coated quartz)
Quartz, silicon dioxide (SiO₂); possible aqua-aura quartz
mineral
Opalite
Man-made opalized glass
mineral
Goldstone
Aventurine Glass (SiO2 + Cu small inclusions)
man-made glass mineral simulant
Likely diamond accent
Diamond (crystalline carbon, C)
gemstone
Green Glass (often marketed as 'Obsidian' or 'Green Quartz')
Amorphous Silica (SiO2) with copper or chromium additives
Mineraloid (Man-made)
Ruby
Corundum (Al2O3 with Chromium traces)
mineral
Blue Sapphire
Corundum (Al2O3)
mineral
Corundum (variety Ruby/Sapphire)
Aluminum Oxide (Al2O3)
mineral
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Rose Quartz
Silicon Dioxide (SiO2)
mineral
Anthracite Coal
Anthracite (Carbon ≥ 86%)
sedimentary
Amethyst ring
Amethyst, purple quartz (SiO₂)
gemstone
Blue aventurine quartz (likely)
Quartz, silicon dioxide (SiO₂), probably blue aventurine variety
mineral
Pink Cubic Zirconia (CZ)
Zirconium Dioxide (ZrO2)
mineral (synthetic)
Emerald
Beryl (Be3Al2(SiO3)6) with trace Chromium/Vanadium
mineral
Likely amethyst cabochon ring
Quartz, SiO₂; purple coloration from trace iron and irradiation
gemstone
Strawberry Quartz (Lepidocrosite/Hematite-Included Quartz)
Quartz (Silicon Dioxide) with Lepidocrosite or Hematite inclusions (SiO2 + Fe2O3 · nH2O)
mineral
Lapis Lazuli
Lazurite-rich metamorphic rock (approx. Na6Ca2(Al6Si6O24)(S,SO4,Cl)1,2)
metamorphic
Man-made Green Quartz (Lab-grown or Treated)
Silicon Dioxide (SiO2) with artificial coloration
mineral
Strawberry Quartz and Rose Quartz
Silicon Dioxide (SiO2) with inclusions
mineral
Diamond (Faceted)
Diamond (Pure Carbon, C)
gemstone
Lapis Lazuli
Lapis lazuli (complex rock; primarily Lazurite: (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)
metamorphic
Champagne topaz (likely)
Topaz, Al₂SiO₄(F,OH)₂
gemstone