Amethyst quartz cluster
Quartz, SiO₂; purple variety amethyst
Category
Browse synthetic polymer (synthetic material) specimens identified by the Rock Identifier community.
Amethyst quartz cluster
Quartz, SiO₂; purple variety amethyst
Blue-green tumbled gemstone, likely turquoise or dyed turquoise
Turquoise: hydrated copper–aluminum phosphate, CuAl₆(PO₄)₄(OH)₈·4H₂O; identification is uncertain from the blurry image
Man-made Ceramic / Clay Figurine
Aluminosilicate Ceramic (Processed Clay)
Coal (Anthracite/Bituminous)
Carbo fossilium (primarily Carbon)
White cabochon gemstone, likely milky chalcedony or opalite
Chalcedony: microcrystalline quartz, SiO₂; appearance may also indicate synthetic opalite glass
Diamond (Faceted Gemstone)
Native Carbon (C)
Luminous Stone (Glow-in-the-dark Synthetic/Man-made Stone)
Strontium Aluminate tinted glass or resin (Crystalline silicate/oxide mix)
Carborundum (Silicon Carbide)
Silicon Carbide (SiC)
Blue glass-like heart pendant, likely synthetic blue spinel or colored glass
Unconfirmed; possibly synthetic spinel (MgAl₂O₄) or cobalt-colored glass
Blue faceted gemstone, likely synthetic sapphire or blue glass
Corundum (Al₂O₃) if sapphire; identity cannot be confirmed visually
Blue glassy mineral specimen, possibly blue topaz or aquamarine
Tentatively topaz (Al₂SiO₄(F,OH)₂) or beryl/aquamarine (Be₃Al₂Si₆O₁₈); identification is limited by severe image blur
Blue cabochon gemstone ring
Likely blue turquoise, glass-filled sapphire, or blue spinel; exact identification requires testing
Blue Sapphire (likely costume glass imitation)
Corundum (Al2O3) with iron/titanium impurities
Emerald (green gemstone in a jewelry setting)
Beryl, Be₃Al₂(SiO₃)₆; green color commonly from chromium and/or vanadium
Hematite
Iron(III) oxide (Fe2O3)
Faceted gemstone ring, likely smoky quartz or garnet in a metal setting
Not determinable from the photograph; possible quartz (SiO₂) or garnet-group silicate
Faceted transparent gemstone pendant
Likely cubic zirconia (zirconium dioxide, ZrO₂); possibly diamond or synthetic moissanite
Painted Rock
Weathered Sedimentary Rock (Painted)
Painted River Rock
Painted Quartzite or Smooth Siltstone
Cubic Zirconia
Zirconium Dioxide (ZrO2)
Turquoise cabochon
Turquoise, hydrated copper aluminum phosphate — CuAl₆(PO₄)₄(OH)₈·4H₂O
Silicon Carbide
Silicon Carbide (Moissanite / Carborundum), SiC
Opalite crescent pendant
Opalite (man-made opalescent glass; not a natural mineral)
Faceted blue gemstone, likely aquamarine
Aquamarine—blue beryl, Be₃Al₂Si₆O₁₈; identification is uncertain from the image alone
Silicon Carbide
Silicon Carbide, SiC
Diamond ring
Diamond, crystalline carbon (C), likely colorless or near-colorless brilliant-cut stones set in gold
Goldstone (with Tiger's Eye and Quartz)
Aventurine glass (Synthetic SiO2 with Cu inclusions)
Opalite
Synthetic Glass (Silica-based)
Opalite
Synthetic Glass (Simulated Opal)
Green cabochon gemstone, likely aventurine or dyed chalcedony
Indeterminate from image; possible quartz variety (SiO₂), including aventurine quartz or chalcedony
Blue Goldstone
Synthetic Aventurescent Glass (Cobalt-doped soda-lime glass)
Blue Goldstone
Synthetic Avanturine Glass (or Aventurine Glass)
Ruby / Red Corundum
Al2O3 (Aluminum Oxide with Chromium trace)
Pink-red faceted gemstone, possibly synthetic corundum or spinel
Uncertain; possible ruby (corundum, Al₂O₃) or red spinel (MgAl₂O₄)
Opal gemstone pendant
Opal (hydrated amorphous silica, SiO₂·nH₂O)
Blue gemstone ring, likely lapis lazuli
Lapis lazuli: lazurite-rich metamorphic rock, chiefly (Na,Ca)8(AlSiO4)6(S,SO)2, commonly with calcite and pyrite
Polished purple gemstone, likely amethyst
Amethyst: purple quartz, silicon dioxide (SiO₂)
Red/pink faceted gemstone, likely synthetic ruby or red glass
Corundum (Al₂O₃) if ruby; identity cannot be confirmed visually
Cubic Zirconia
Zirconium Dioxide (ZrO2)
Amber (Simulated/Faturan Style)
Resin mix (Likely Phenolic/Celluloid if synthetic, Succinite if natural)
Opalite
Synthesized glass / Silicon dioxide
Inlaid turquoise and red-stone earrings
Likely turquoise (CuAl₆(PO₄)₄(OH)₈·4H₂O) with an unidentified red inlay; the image does not establish the materials