Synthetic (Not A Natural Rock)

Lapis Lazuli

Lapis Lazuli (Rock composed chiefly of lazurite, calcite, and pyrite)

Diamond (or Cubic Zirconia)

Carbon (C) or Zirconium Dioxide (ZrO2)

Cubic Zirconia

Zirconium dioxide (ZrO2)

Faceted gemstone in a jewelry setting

Indeterminate from image; likely quartz, cubic zirconia, or another transparent faceted stone

Citrine

Silicon Dioxide (SiO2)

Blue Sapphire (Synthetic or Man-made Glass Imitation)

Corundum (Al2O3) if natural; Lead-glass or Spinal if synthetic

Blue faceted gemstone, likely synthetic spinel or sapphire

Undetermined from image; possible synthetic corundum (Al₂O₃) or spinel (MgAl₂O₄)

Ruby (cushion-cut red gemstone)

Corundum, Al₂O₃; red color is typically caused by chromium

Small rock fragment (unidentified)

Undetermined; the image does not show enough detail for reliable identification

Opalite

Synthetic Opalised Glass

Tumbled turquoise-like stone

Likely turquoise, hydrated copper aluminum phosphate: CuAl₆(PO₄)₄(OH)₈·4H₂O

Opalite

Synthetic glass (SiO2 + impurities)

Dalmatian Stone

Dalmatian Stone (Felsic Igneous Rock)

Blue Goldstone

Man-made glass infused with copper crystals

Amethyst quartz cluster

Quartz, SiO₂; purple variety amethyst

Faceted dark gemstone, likely black spinel

Spinel, MgAl₂O₄ (visual identification is uncertain; black sapphire or other dark gems can look similar)

Amethyst gemstone ring

Quartz, purple variety — SiO₂

Red faceted gemstone, likely synthetic ruby

Corundum (Al₂O₃); ruby is red chromium-bearing corundum

Luminous Stone (Glow-in-the-dark Synthetic/Man-made Stone)

Strontium Aluminate tinted glass or resin (Crystalline silicate/oxide mix)

Gemstone Ring

Various (Likely Glass, Cubic Zirconia, or assorted semi-precious stones)

Blue cabochon gemstone ring

Uncertain; likely blue sapphire (corundum, Al₂O₃), blue topaz, or synthetic glass/spinel

Note: Item is a Synthetic/Man-made Object

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

Blue Sapphire (likely costume glass imitation)

Corundum (Al2O3) with iron/titanium impurities

Green faceted gemstone earrings

Undetermined; possibly green glass or synthetic emerald-type material, rather than identifiable natural emerald

Opalite

Synthetic opalescent glass

Opalite

Synthesized glass / Silicon dioxide

Blue-green faceted gemstone, possibly glass or synthetic material

Not identifiable from the image; possible synthetic spinel or glass

Painted River Rock

Artificially Coated Sedimentary Rock

Blue-green opal, likely polished common or synthetic opal

Opal (hydrated amorphous silica, SiO₂·nH₂O); identification from the image is uncertain

Clear faceted gemstone in a metal jewelry setting (likely imitation glass or cubic zirconia)

Unidentified transparent faceted stone; possibly cubic zirconia (ZrO₂) or glass

Faceted colorless gemstone, likely quartz or glass imitation

Most plausibly rock crystal (quartz, SiO₂); identity is uncertain because the photograph shows only intense facet reflections

Chalcanthite (Likely Synthetic/Lab-Grown)

Hydrated copper(II) sulfate (CuSO4·5H2O)

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

Red corundum (ruby-colored polished crystal)

Corundum, aluminum oxide (Al₂O₃); red color is typically caused by chromium

Green faceted gemstone, likely synthetic glass or peridot

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

Ruby ring (likely synthetic ruby)

Corundum, Al₂O₃; red color from chromium. The image alone cannot establish whether the stone is natural or lab-grown.

Likely bismuth crystal

Synthetic bismuth (Bi), crystallized from molten metal; not a natural rock-forming specimen

Emerald (cut gemstone)

Beryl, Be₃Al₂Si₆O₁₈, colored green mainly by chromium and/or vanadium

Opalite (a synthetic glass)

Silicon Dioxide (SiO2) with various additives; not a true mineral but a man-made gem simulant

Diamond

Natural Diamond (Carbon, C)

Opalite

Man-made opalescent glass

Moonstone cabochon (probable)

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