Lapis Lazuli
Lapis lazuli (Rock composed primarily of Lazurite (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2, Calcite, and Pyrite)
metamorphic
Category
Synthetic Polymer (Polylactic Acid)
Browse synthetic polymer (polylactic acid) specimens identified by the Rock Identifier community.
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Emerald in Matrix
Beryl (Be3Al2Si6O18) with trace amounts of Chromium/Vanadium
mineral
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
Opalite
Synthetic Glass (Hydrated Silica Simulant)
mineral
Blue Sapphire (in a faceted jewelry setting)
Corundum (Al2O3) with trace Iron and Titanium
mineral
Ruby
Corundum (Al2O3)
mineral
Ruby
Corundum (Al2O3 with Chromium)
mineral
Gemstone-set silver jewelry piece
Likely mixed faceted gemstones in a silver-colored metal setting; stones may include sapphire, ruby/garnet, and yellow sapphire or citrine, but the image is insufficient for species-level identification.
gemstone
Blue Goldstone
Synthetic glass with cobalt and copper inclusions
man-made glass
Blue Goldstone
Synthetic Avanturine Glass (or Aventurine Glass)
Synthetic Glass
Lava Stone and Chakra Beads
Basalt (with various mineral/synthetic beads)
igneous
Opalite
Synthetic Fluorescent Glass (SiO2 + impurities)
mineraloid (synthetic)
Blue Cracked Quartz (Dyed Fire Crackle Quartz)
Silicon Dioxide (SiO2) with synthetic dye
mineral
Faceted pale-green gemstone, likely prasiolite or green quartz
Quartz (SiO₂), likely prasiolite; identification is uncertain from the photograph
gemstone
Blue-green turquoise (probable)
Turquoise — hydrated copper aluminum phosphate, CuAl₆(PO₄)₄(OH)₈·4H₂O
mineral
Hematite
Iron(III) oxide, Fe2O3
mineral
Blue Goldstone
Man-made glass with cobalt and metal flecks
man-made glass
Diamond (or Cut Gemstone / Cubic Zirconia)
Carbon (C)
gemstone
Dyed Purple Agate Sliced Tablet
Silicon Dioxide (SiO2), variety Chalcedony
gemstone
Emerald
Beryl (Be3Al2(SiO3)6) colored by Chromium and/or Vanadium
mineral
Opalite
Synthetically produced glass (Silicon Dioxide with metallic inclusions)
Mineraloid (Man-made Glass)
Cherry Quartz with Rose Quartz
Crystalline Quartz (SiO2) with glass-based synthetic components
gemstone
Opalite
Man-made Glass (SiO2 + additives)
mineraloid (synthetic)
Red corundum (ruby-colored polished crystal)
Corundum, aluminum oxide (Al₂O₃); red color is typically caused by chromium
gemstone
Smoky Quartz
Smoky Quartz (Silicon Dioxide, SiO2)
mineral
Amber
Succinite (Fossilized Tree Resin)
fossil
Terrazzo (Man-made Composite)
Cementitious or Resin-bound Lithic Composite
sedimentary (artificial)
Amber
Fossilized Resin (C10H16O)
mineral
Amber
Succinite
Organic Mineraloid
Amber
Succinite (Fossilized Tree Resin)
mineraloid
Amber
Amber (C10H16O)
mineral
Blue sapphire ring
Corundum (aluminum oxide, Al₂O₃), likely heat-treated sapphire
gemstone
Amethyst gemstone ring
Quartz, purple variety — SiO₂
gemstone
K2 Stone (or K2 Jasper)
Azurite-in-Granite (Potassium Feldspar, Quartz, Plagioclase, Muscovite, and Azurite)
igneous
Carborundum (Silicon Carbide)
Silicon Carbide (SiC)
mineral
Cubic Zirconia (Faceted)
Zirconium dioxide (ZrO2)
mineral
Silicon
Crystalline Silicon (Si)
mineral
Cubic Zirconia (Simulated Diamond)
Zirconium dioxide (ZrO2)
mineral
Blue faceted gemstones, likely blue sapphire
Corundum (Al₂O₃), blue varieties colored chiefly by iron and titanium
gemstone
Amber
Fossilized Tree Resin (Succinate)
mineral
Blue-and-white opalite sphere
Opalite (commercial synthetic or glass-based imitation; not true opal), typically silica glass or synthetic opalescent material
mineral
Amethyst (Tumbled)
Silicon Dioxide (SiO2) with Fe3+ impurities
mineral