Synthetic Material (Not A Rock Or Mineral)

Pink Dyed Agate

Silicon Dioxide (SiO2) with synthetic pigment

Bituminous Coal

Organic-rich sedimentary rock (Complex hydrocarbons)

Faceted Clear Quartz or Diamond Simulant

Silicon Dioxide (SiO2) if Quartz or Cubic Zirconia (ZrO2) if Synthetic

Cubic Zirconia (Simulated Diamond)

Zirconium dioxide (ZrO2)

Hematite

Iron(III) oxide, Fe2O3

Blue Goldstone

Man-made glass with cobalt and metal flecks

Opalite

Synthetic Opalised Glass

Colorless faceted gemstone (likely cubic zirconia)

Cubic zirconia, ZrO₂ (synthetic zirconium dioxide); possibly synthetic glass or lab-grown diamond

Costume Jewelry with Synthetic Gemstones

Synthetic Cubic Zirconia and Glass (SiO2 / ZrO2)

Blue-violet faceted gemstone, likely amethyst

Quartz (SiO₂), purple variety colored mainly by iron impurities and irradiation

Colorless faceted gemstone, likely cubic zirconia

Cubic zirconia (zirconium dioxide, ZrO₂); visual confirmation is unavailable

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

Faceted clear quartz (rock crystal), likely a cut imitation or low-grade gemstone

Quartz, silicon dioxide (SiO₂)

Amethyst (faceted gemstone)

Quartz, silicon dioxide (SiO₂), purple variety colored mainly by iron-related defects

Faceted color-change gemstone, likely synthetic alexandrite or glass imitation

Alexandrite: chrysoberyl, BeAl₂O₄; exact identification requires gemological testing

Tumbled amethyst

Quartz, crystalline silicon dioxide (SiO₂), purple variety colored mainly by iron impurities and irradiation

Polished blue stone, likely sodalite or dyed agate

Most consistent with sodalite (Na₈(Al₆Si₆O₂₄)Cl₂), though the image cannot confirm composition

Pink/red faceted gemstone, likely synthetic ruby or pink sapphire

Corundum, aluminum oxide (Al₂O₃); likely lab-grown or treated material

Gemstone rings (stones not reliably identifiable)

The pale stone may be quartz or another translucent gem; the red stone may be ruby, garnet, or synthetic corundum. Image detail is insufficient for identification.

Blue Sapphire

Corundum (Al2O3) with traces of Iron and Titanium

Carnelian

Carnelian (Cryptocrystalline Quartz, SiO2)

Pink Dyed Agate

Silicon Dioxide (SiO2) - Variety Agate

Polished hematite

Hematite (Fe₂O₃), likely a tumbled iron-oxide specimen

Milky Quartz

Crystalline Silicon Dioxide (SiO2)

Cherry Quartz with Rose Quartz

Crystalline Quartz (SiO2) with glass-based synthetic components

Rough Ruby

Corundum (Al2O3 with Chromium impurities)

Diamond (or Diamond Simulant)

C (Carbon) or synthetic equivalent

Opal ring

Common opal, likely synthetic or assembled blue-green opal (hydrated amorphous silica, SiO₂·nH₂O)

Purple cabochon gemstone, likely amethyst or purple sapphire/spinel

Indeterminate from image; possible quartz (SiO₂), corundum (Al₂O₃), or spinel (MgAl₂O₄)

Opalite

Man-made Glass (Synthetic Opalized Glass)

Polished tiger’s-eye

Quartz variety, SiO₂, with crocidolite-derived iron inclusions

Star sapphire ring

Corundum (Al₂O₃), likely asteriated sapphire

Red gemstone ring, possibly synthetic ruby or red glass

Unidentified red stone; ruby is corundum (Al₂O₃), but the image cannot confirm its identity

Opalite

Opalescent Glass (SiO2 + coloring agents)

Faceted purple-blue beads, likely synthetic glass or treated gemstone

Indeterminate; possible synthetic corundum, synthetic spinel, or dyed quartz (SiO₂)

Clear quartz crystal sphere

Quartz (silicon dioxide, SiO₂)

Faceted blue gemstone, likely blue topaz or synthetic spinel

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

Dyed Quartzite

Metamorphosed Quartz (SiO2) with synthetic pigment

Carborundum (Silicon Carbide)

Silicon carbide (SiC)

Hematite bead bracelet

Hematite (iron(III) oxide, Fe₂O₃), likely polished magnetic hematite or hematite-coated beads

Opalite

Synthetic Glass (Hydrated Silica Simulant)

Green faceted gemstone, likely synthetic glass or peridot

Indeterminate from image; possible peridot (olivine, (Mg,Fe)₂SiO₄) or green synthetic glass