Painted River Rock
Painted Quartzite or Smooth Siltstone
Category
Browse mineral (synthetic) specimens identified by the Rock Identifier community.
Painted River Rock
Painted Quartzite or Smooth Siltstone
Faceted gemstone in a jewelry setting
Indeterminate from image; likely quartz, cubic zirconia, or another transparent faceted stone
Emerald
Beryl (Be3Al2(SiO3)6) with Chromium/Vanadium impurities
Tumbled labradorite beads
Labradorite, a calcium-rich plagioclase feldspar (approximately (Ca,Na)(Al,Si)₄O₈)
Ametrine
Silicon Dioxide (SiO2) with iron impurities
Tiger’s eye
Quartz (SiO₂), fibrous pseudomorph after crocidolite
Larimar
Pectolite (NaCa2Si3O8(OH))
Green faceted gemstone earrings
Undetermined; possibly green glass or synthetic emerald-type material, rather than identifiable natural emerald
Black spinel bead strand
Spinel, magnesium aluminum oxide (MgAl₂O₄)
Pink faceted gemstone, likely synthetic or treated quartz
Quartz, silicon dioxide (SiO₂); exact identity cannot be confirmed from the image
Sandstone (likely Fossilized Wood or Concrete Simulacrum)
Arenite / Silicified Wood / Anthropogenic Concrete
Turquoise cabochon
Turquoise, hydrated copper aluminum phosphate — CuAl₆(PO₄)₄(OH)₈·4H₂O
Turquoise cabochon or turquoise-bearing material
Turquoise, hydrated copper aluminum phosphate — CuAl₆(PO₄)₄(OH)₈·4H₂O
Ruby (varieties of Corundum)
Aluminum oxide (Al2O3) with Chromium traces
Smoky Quartz
Silicon Dioxide (SiO2)
Blue Sapphire
Corundum (Al2O3)
Ruby (Rough/Raw)
Corundum (Al2O3:Cr)
Red gemstone ring, possibly synthetic ruby or red glass
Unidentified red stone; ruby is corundum (Al₂O₃), but the image cannot confirm its identity
Cubic Zirconia (Faceted)
Zirconium Dioxide (ZrO2)
Opalite
Synthetic Glass (Hydrated Crystalline Silicon Dioxide simulation)
Polished ruby cabochon (likely synthetic or treated)
Corundum, aluminum oxide (Al₂O₃), colored red by chromium
Green gemstone ring, likely emerald simulant or jade
Uncertain; possible beryl (emerald, Be₃Al₂Si₆O₁₈) or jadeite (NaAlSi₂O₆), but the blurred image may show synthetic glass or another treated stone
Goldstone (likely blue-free synthetic goldstone pendant)
Synthetic aventurine glass; silica glass with dispersed metallic copper crystals
Red gemstone ring, likely garnet or synthetic ruby
Possibly almandine garnet (Fe₃Al₂(SiO₄)₃) or corundum/ruby (Al₂O₃); image alone cannot distinguish
Synthetic Costume Glove (Paws)
Polyethylene terephthalate (Polyester) & Polyurethane blend
Hematite
Hematite (Fe₂O₃), likely a polished specular hematite palm stone
Ruby
Corundum (Aluminum Oxide with Chromium), Al2O3:Cr
Diamond (in jewelry)
Cubic Carbon (C)
Assorted Semi-Precious Gemstone Crosses
Quartz, Silicates, Carbonates (various)
Banded Black Onyx (Chalcedony)
Silicon Dioxide (SiO₂)
Ruby
Corundum (Al2O3 with Chromium impurities)
Tumbled amethyst
Quartz, crystalline silicon dioxide (SiO₂), purple variety colored mainly by iron impurities and irradiation
Blue-green opal, likely polished common or synthetic opal
Opal (hydrated amorphous silica, SiO₂·nH₂O); identification from the image is uncertain
Opalite
Synthetic Glass (Silica-based)
Synthetic Faux Fur Fursuit
Polyacrylonitrile / Polyester (Synthetic Textile)
Opaline Glass (Opalite)
Synthetic Silicon Dioxide Glass
Jadeite and Mixed Gemstones (Ruby, Sapphire, Emerald)
Jadeite (NaAlSi2O6), Corundum (Al2O3), Beryl (Be3Al2(Si6O18))
Synthetic Resin (Artificial Specimen)
Polyurethane or Polyester Resin
Smoky Quartz
Silicon Dioxide (SiO2)
Goldstone
Avventurina (Man-made Glass with Copper inclusions)
Silicon Carbide (Carborundum)
Silicon Carbide (SiC)
Silicon
Element Si