Mineral Simulant (Synthetic Glass)

Black onyx or black obsidian bead bracelet

Likely chalcedony (microcrystalline quartz, SiO₂) if onyx; alternatively volcanic glass (obsidian)

Jadeite and Mixed Gemstones (Ruby, Sapphire, Emerald)

Jadeite (NaAlSi2O6), Corundum (Al2O3), Beryl (Be3Al2(Si6O18))

Blue cabochon gemstone, likely synthetic glass or dyed stone

Indeterminate from image; possible glass, synthetic spinel, sodalite, or lapis lazuli

Polished labradorite cabochon

Labradorite, calcium-rich plagioclase feldspar; approximately (Ca,Na)(Al,Si)₄O₈

Agate (Polished Sphere)

Silicon Dioxide (SiO2)

Blue Goldstone

Synthetic glass with cobalt and copper inclusions

Strawberry Quartz (Lepidocrosite/Hematite-Included Quartz)

Quartz (Silicon Dioxide) with Lepidocrosite or Hematite inclusions (SiO2 + Fe2O3 · nH2O)

Goldstone (Red)

Aventurine Glass

Diamond (or Diamond Simulant/Cubic Zirconia)

Carbon (C) - if diamond, or Zirconium dioxide (ZrO2) - if Cubic Zirconia

Colorless faceted gemstone, likely glass or quartz

Uncertain; appearance is consistent with faceted quartz (SiO₂), but cut glass or cubic zirconia cannot be excluded from the photograph

Goldstone

Avventurina (Cu + SiO2 glass)

Silicon

Element Si

Opalite

Synthetic Glass (Amorphized Silicon Dioxide)

Amethyst ring

Amethyst, purple quartz (SiO₂)

Goldstone (aventurine glass)

Synthetic copper-bearing soda-lime glass; commonly sold as red goldstone

Blue Topaz

Topaz [Al2SiO4(F,OH)2]

Labradorite cabochon

Labradorite, a calcium-rich plagioclase feldspar; approximately (Ca,Na)(Al,Si)₄O₈

Artificial Rock Face (Faux Rock)

Glass Fiber Reinforced Concrete (GFRC)

Smoky Quartz

Silicon Dioxide (SiO2)

Smoky Quartz

Smoky Quartz (Silicon Dioxide - SiO2)

Pink amethyst or pale pink quartz gemstone

Quartz, SiO₂; pink coloration may result from microscopic inclusions or irradiation-related defects

Yellow faceted gemstone, likely citrine or synthetic glass

Citrine (quartz, SiO₂) is the leading natural possibility; visual identification is uncertain from the photograph

Opalite

Synthetic Fluorescent Glass (SiO2 + impurities)

Smoky Quartz

Silicon Dioxide (SiO2) with aluminum impurities and natural radiation

Faceted citrine-colored gemstone (likely synthetic/display stone)

Quartz, SiO₂, if natural citrine; possibly synthetic sapphire or glass imitation

Goldstone (Synthetic Aventurescence Glass)

Cuprous Aventurescent Glass (Silicon Dioxide with Copper inclusions)

Amethyst ring

Amethyst, purple quartz (SiO₂), likely set with diamond or other accent stones

Tourmalinated Quartz

Crystalline Silicon Dioxide with Schorl inclusions (SiO2 + NaFe3Al6(BO3)3Si6O18(OH)4)

Moonstone cabochon (probable)

Adularescent feldspar, usually orthoclase–albite intergrowth (KAlSi3O8–NaAlSi3O8)

Man-made Synthetic Material (Plastic/Composite)

Acrylonitrile Butadiene Styrene (ABS) or High-Impact Polystyrene (HIPS)

Beach Pebble Quartzite / Chalcedony Pebble

Silicon Dioxide (SiO2)

Sapphire (Blue)

Corundum (Al2O3)

Citrine

Citrine (Silicon Dioxide, SiO2)

Blue resin-coated or dyed stone cabochon

Likely dyed chalcedony/agate (microcrystalline quartz, SiO₂); exact material is uncertain from the image

White Sapphire

Corundum (Al2O3)

Pink tourmaline (rubellite)

Elbaite tourmaline, lithium sodium aluminum borosilicate: Na(Li1.5Al1.5)Al6(BO3)3Si6O18(OH)4

Polished tiger’s-eye

Quartz variety, SiO₂, with crocidolite-derived iron inclusions

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

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

Rose Quartz

Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese

Blue Goldstone

Synthetic Aventurescent Glass (Cobalt-doped soda-lime glass)

Likely amethyst cabochon ring

Quartz, SiO₂; purple coloration from trace iron and irradiation

Blue Sapphire

Corundum (Al2O3)