Rock Identifier

Category

Synthetic Glass

Browse synthetic glass specimens identified by the Rock Identifier community.

Learn about Synthetic Glass in the encyclopedia

Opalite

Yttrium Aluminum Garnet

Yttrium Aluminum Garnet

Zincite

Sideromelane

Lead Feldspar

Black Obsidian

Maskelynite

Tachylite

Obsidian

Hyalite Opal

Perlite

Macusanite

Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)

Cubic Zirconia (Cubic Zirconium Dioxide (ZrO2)) — mineral

Cubic Zirconia

Cubic Zirconium Dioxide (ZrO2)

Pearls (likely freshwater cultured pearls) (Pearl: nacre, primarily aragonite (CaCO₃) with conchiolin) — gemstone

Pearls (likely freshwater cultured pearls)

Pearl: nacre, primarily aragonite (CaCO₃) with conchiolin

Blue cabochon gemstone ring (Likely blue turquoise, glass-filled sapphire, or blue spinel; exact identification requires testing) — gemstone

Blue cabochon gemstone ring

Likely blue turquoise, glass-filled sapphire, or blue spinel; exact identification requires testing

Smoky Quartz (Smoky Quartz (Silicon Dioxide - SiO2)) — mineral

Smoky Quartz

Smoky Quartz (Silicon Dioxide - SiO2)

Opal cabochon or opal-like decorative specimen (Hydrated amorphous silica, SiO₂·nH₂O; likely synthetic or assembled opal material) — gemstone

Opal cabochon or opal-like decorative specimen

Hydrated amorphous silica, SiO₂·nH₂O; likely synthetic or assembled opal material

Blue Sapphire (Corundum (Al2O3 with trace Titanium and Iron)) — mineral

Blue Sapphire

Corundum (Al2O3 with trace Titanium and Iron)

Dyed Alum or Dyed Quartz (Ornamental Crystal) (Silicon Dioxide (SiO2) or Potassium Alum [KAl(SO4)2·12H2O]) — mineral

Dyed Alum or Dyed Quartz (Ornamental Crystal)

Silicon Dioxide (SiO2) or Potassium Alum [KAl(SO4)2·12H2O]

Faceted blue gemstone, likely blue topaz or synthetic spinel (Topaz (Al₂SiO₄(F,OH)₂) or synthetic spinel (MgAl₂O₄); image insufficient for certainty) — gemstone

Faceted blue gemstone, likely blue topaz or synthetic spinel

Topaz (Al₂SiO₄(F,OH)₂) or synthetic spinel (MgAl₂O₄); image insufficient for certainty

Parti Sapphire (Corundum (Al2O3)) — mineral

Parti Sapphire

Corundum (Al2O3)

Ruby (Corundum (Al2O3)) — mineral

Ruby

Corundum (Al2O3)

Rose Quartz (Silicon Dioxide (SiO2)) — mineral

Rose Quartz

Silicon Dioxide (SiO2)

Iridescent polished/tumbled stone (likely coated quartz or glassy synthetic material) (Indeterminate; possibly quartz (SiO₂) with an artificial iridescent coating) — mineral

Iridescent polished/tumbled stone (likely coated quartz or glassy synthetic material)

Indeterminate; possibly quartz (SiO₂) with an artificial iridescent coating

Tumbled amethyst (Amethyst, purple quartz (SiO₂)) — mineral

Tumbled amethyst

Amethyst, purple quartz (SiO₂)

Cubic Zirconia (Cubic Zirconium Dioxide (ZrO2)) — gemstone

Cubic Zirconia

Cubic Zirconium Dioxide (ZrO2)

Crackled Quartz (Dyed) (Silicon Dioxide (SiO2)) — mineral

Crackled Quartz (Dyed)

Silicon Dioxide (SiO2)

Clear quartz sphere (Quartz (silicon dioxide, SiO₂), likely rock crystal or low-grade milky quartz) — mineral

Clear quartz sphere

Quartz (silicon dioxide, SiO₂), likely rock crystal or low-grade milky quartz

Dyed Quartz Pendant (Silicon Dioxide (SiO2) with artificial dye) — mineral

Dyed Quartz Pendant

Silicon Dioxide (SiO2) with artificial dye

Turquoise (CuAl6(PO4)4(OH)8·4H2O) — mineral

Turquoise

CuAl6(PO4)4(OH)8·4H2O

Silicon (Element Si) — mineral

Silicon

Element Si

Lapis Lazuli (Lazurite-rich metamorphic rock (approx. Na6Ca2(Al6Si6O24)(S,SO4,Cl)1,2)) — metamorphic

Lapis Lazuli

Lazurite-rich metamorphic rock (approx. Na6Ca2(Al6Si6O24)(S,SO4,Cl)1,2)

Red-orange cabochon, likely carnelian or glass imitation (Carnelian: chalcedony (microcrystalline SiO₂), commonly iron-colored) — gemstone

Red-orange cabochon, likely carnelian or glass imitation

Carnelian: chalcedony (microcrystalline SiO₂), commonly iron-colored

Yellow-orange faceted gemstone, likely citrine or yellow topaz (Citrine: quartz, SiO₂; yellow topaz: Al₂SiO₄(F,OH)₂) — gemstone

Yellow-orange faceted gemstone, likely citrine or yellow topaz

Citrine: quartz, SiO₂; yellow topaz: Al₂SiO₄(F,OH)₂

Citrine (Citrine (Silicon Dioxide, SiO2)) — mineral

Citrine

Citrine (Silicon Dioxide, SiO2)

Blue quartz crystal (likely synthetic or coated quartz) (Quartz, silicon dioxide (SiO₂); possible aqua-aura quartz) — mineral

Blue quartz crystal (likely synthetic or coated quartz)

Quartz, silicon dioxide (SiO₂); possible aqua-aura quartz

Diamond (Cut Gemstone) (Carbon (C)) — gemstone

Diamond (Cut Gemstone)

Carbon (C)

Note: Item is a Synthetic/Man-made Object (Titanium-coated Stainless Steel (Fe-Cr-Ni-Ti)) — Non-geological

Note: Item is a Synthetic/Man-made Object

Titanium-coated Stainless Steel (Fe-Cr-Ni-Ti)

Note: Item is not a geological specimen (Polyester mesh and Ethylene-vinyl acetate (EVA) polymer) — Synthetic / Anthropogenic Material

Note: Item is not a geological specimen

Polyester mesh and Ethylene-vinyl acetate (EVA) polymer

Synthetic / Anthropogenic Material

Lapis Lazuli (Lazurite-dominated metamorphic rock ((Na,Ca)8(AlSiO4)6(SO4,S,Cl)2)) — metamorphic

Lapis Lazuli

Lazurite-dominated metamorphic rock ((Na,Ca)8(AlSiO4)6(SO4,S,Cl)2)

Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)

White seed-bead gemstone strand, likely freshwater pearl or shell pearl (Pearl: nacreous calcium carbonate, chiefly aragonite (CaCO₃) in conchiolin; identification uncertain from image) — gemstone

White seed-bead gemstone strand, likely freshwater pearl or shell pearl

Pearl: nacreous calcium carbonate, chiefly aragonite (CaCO₃) in conchiolin; identification uncertain from image

Amethyst (likely synthetic or treated) (Purple quartz, SiO₂; color caused mainly by trace iron and irradiation) — gemstone

Amethyst (likely synthetic or treated)

Purple quartz, SiO₂; color caused mainly by trace iron and irradiation

Bouncy Ball (Synthetic Rubber Polymer) (Polybutadiene / Ethylene Vinyl Acetate (EVA)) — Synthetic material (Not a rock or mineral)

Bouncy Ball (Synthetic Rubber Polymer)

Polybutadiene / Ethylene Vinyl Acetate (EVA)

Synthetic material (Not a rock or mineral)

Ametrine (SiO2 (Silicon Dioxide with iron impurities)) — gemstone

Ametrine

SiO2 (Silicon Dioxide with iron impurities)

Blue Sapphire (Corundum (Al2O3) with traces of Iron and Titanium) — mineral

Blue Sapphire

Corundum (Al2O3) with traces of Iron and Titanium

Digital Multimeter (Synthetic Object) (Digital Multimeter (DMM)) — not a rock

Digital Multimeter (Synthetic Object)

Digital Multimeter (DMM)

Blue Sapphire (Corundum (Al2O3)) — gemstone

Blue Sapphire

Corundum (Al2O3)

Synthetic opal cabochon/bead (Opal-like hydrated amorphous silica; likely lab-created polymer–silica opal or Gilson synthetic opal (SiO₂·nH₂O)) — gemstone

Synthetic opal cabochon/bead

Opal-like hydrated amorphous silica; likely lab-created polymer–silica opal or Gilson synthetic opal (SiO₂·nH₂O)

Emerald (Beryl (Be3Al2(SiO3)6) with Chromium/Vanadium impurities) — mineral

Emerald

Beryl (Be3Al2(SiO3)6) with Chromium/Vanadium impurities

Moissanite (Silicon Carbide (SiC)) — mineral

Moissanite

Silicon Carbide (SiC)

Unidentified polished dark gemstone cabochon (Possibly hematite, obsidian, jet, or dark agate; image insufficient for a definitive identification) — gemstone

Unidentified polished dark gemstone cabochon

Possibly hematite, obsidian, jet, or dark agate; image insufficient for a definitive identification

Dyed Agate Slice (Silicon Dioxide (SiO2) with artificial dyes) — mineral

Dyed Agate Slice

Silicon Dioxide (SiO2) with artificial dyes