Sapphire
Corundum (Al2O3)
Category
Browse synthetic polymer (polylactic acid) specimens identified by the Rock Identifier community.
Sapphire
Corundum (Al2O3)
Aura Quartz
Silicon Dioxide (SiO2) with Titanium/Metal vapor coating
Dalmatian Stone
Dalmatian Jasper (a misnomer) / Perthitic Feldspar Rock
Diamond (Faceted Colorless)
Diamond (Pure Carbon, C)
Colorless Gemstone (possibly Diamond or Cubic Zirconia)
C (Diamond) or ZrO2 (Cubic Zirconia)
Pearl and Garnet Glass
Calcium Carbonate (CaCO3) for pearl; Silicon Dioxide (SiO2) for glass
Emerald
Beryl (Be₃Al₂Si₆Oထ₈) with Chromium/Vanadium impurities
Strawberry Quartz (Hematoid Quartz)
Silicon Dioxide with Iron Oxide inclusions (SiO2 + Fe2O3)
Blue Goldstone
Aventurine Glass
Silicon Carbide (Carborundum)
Moissanite (SiC), though mostly synthetic
Blue glassy mineral fragment, possibly sodalite or dyed/cobalt glass
Uncertain; likely sodalite (Na₈Al₆Si₆O₂₄Cl₂) if natural, but vivid blue color may indicate cobalt-colored glass
Decorative gemstone bracelet or jewelry
Unidentifiable from the blurred image; likely colored glass or synthetic stones, possibly mixed gemstone beads
Hematite bead bracelet
Hematite (Fe₂O₃), likely polished or magnetically enhanced beads
Lapidary Wax (imitation/wax model)
Hydrocarbon wax blend with colorant (imitating Lapis Lazuli/Emerald)
Limonite (Iron Ore)
Limonite; FeO(OH)·nH2O
Red synthetic corundum (ruby-colored lab-grown sapphire)
Corundum, aluminum oxide (Al₂O₃), likely synthetic and chromium-colored
Blue Sapphire
Corundum (Al2O3) with traces of Iron and Titanium
Malachite
Copper carbonate hydroxide [Cu2CO3(OH)2]
Amber (Copal)
Fossilized Tree Resin
Cubic Zirconia (Faceted)
Zirconium dioxide (ZrO2)
Anthropogenic Heat Source (Electronic/Industrial Interface)
Thermal IR emission (Electronic infrastructure)
Cubic Zirconia
Zirconium Dioxide (ZrO2)
Blue Sapphire (Synthetic or Man-made Glass Imitation)
Corundum (Al2O3) if natural; Lead-glass or Spinal if synthetic
Ruby (Faceted)
Corundum (Al2O3:Cr)
Blue sapphire ring
Corundum, aluminum oxide (Al₂O₃), blue variety colored mainly by iron and titanium
Cat's Eye Moonstone (Simulated/Synthetic or natural Cat's Eye Quartz/Glass)
There is no single scientific name. The appearance suggests either: Moonstone (feldspar group), Cat's Eye Quartz (SiO2), Apatite (Ca5(PO4)3(F,Cl,OH)), or most likely a synthetic material such as Fiber Optic Glass or 'Opalite' (a type of glass).
Amber
Succinite (fossilized tree resin)
Amber
Succinite
Amber
Succinate (Organic Fossilized Resin)
Bismuth
Bismuth (Bi)
Cobalt Glass Slug (Man-made Glass)
Amorphous Silica with Cobalt Oxide (SiO2 + CoO)
Painted River Rock
Polished fluvial clast with acrylic/synthetic pigment coating
Silicon Carbide (Carborundum)
Moissanite (SiC)
Cubic Zirconia (CZ)
Zirconium dioxide (ZrO2)
Hematite
Iron(III) oxide (Fe2O3)
Pink Dyed Agate
Silicon Dioxide (SiO2) - Variety Agate
Dyed Agate
Silicon Dioxide (SiO2) - variety Chalcedony
Tumbled hematite
Hematite (Fe₂O₃), commonly sold as “magnetic hematite” when synthetic or magnetized
Blue glass-like gemstone specimen (likely dyed or synthetic quartz)
Uncertain; possibly blue-dyed quartz or synthetic glass, not confidently identifiable from the image
Synthetic Ruby (Jewel Bearings)
Synthetic Corundum (Al2O3 doped with Chromium)
Pink/red faceted gemstone, likely synthetic corundum or glass imitation
Corundum (Al₂O₃), ruby/sapphire variety; exact identification requires testing
Ruby
Corundum (Al2O3 with Chromium traces)