Mineral Simulant (Synthetic Glass)

Faceted clear gemstone in a gold-tone ring, likely colorless glass or cubic zirconia

Undetermined; possible cubic zirconia (ZrO₂) or glass (amorphous SiO₂)

Opalite

Synthetic Glass (Simulated Opal)

Diamond (or Diamond Simulant)

Carbon (C)

Faceted clear gemstone in a gold-colored setting

Unidentified transparent faceted stone; possibly quartz, glass, or another colorless gem

Opalite

Synthetic Opalized Glass

Opalite

Synthetic Glass (SiO2 + impurities)

Opalite

Synthetic Opalised Glass

Gold ring with a clear faceted gemstone

Likely diamond (carbon, C); the photograph is insufficient to confirm the stone or metal

Opalite

Synthesized glass / Silicon dioxide

Blue Zircon

Zircon (Zirconium Silicate - ZrSiO4)

Goldstone

Aventurine Glass (Man-made)

Ruby (set in a ring; possibly synthetic or imitation)

Corundum, Al₂O₃; red color is typically caused by chromium

Red gemstone, likely ruby

Corundum (Al₂O₃), colored red by chromium

Red cabochon gemstone ring (likely glass or synthetic stone)

Undetermined; the image does not establish a natural mineral identity

Faceted clear gemstone in a metal setting

Unidentified transparent faceted gem; possibilities include quartz (SiO₂), topaz (Al₂SiO₄(F,OH)₂), or glass—the image is insufficient for identification.

Tumbled opalite (likely man-made glass)

Opalite glass; a synthetic opalescent glass, not a natural mineral species

Cobalt Glass Slug (Man-made Glass)

Amorphous Silica with Cobalt Oxide (SiO2 + CoO)

Diamond (or Diamond Simulant)

Carbon (C) if diamond, various if simulant (e.g., Cubic Zirconia ZrO2)

Yellow-green faceted gemstone (possibly peridot)

Undetermined; peridot is gem-quality olivine, (Mg,Fe)₂SiO₄

Diamond (or Diamond Simulant)

Carbon (C) or Zirconium dioxide (ZrO2) for CZ

Likely turquoise-colored mineral or dyed stone

Unidentified opaque blue-green material; turquoise, chrysocolla, dyed howlite, or glass cannot be distinguished from the image alone

Moissanite

Silicon Carbide (SiC)

Opalite

Synthetic Opalized Glass / Man-made Glass

Opalite (Synthetic Moonstone/Opal)

Synthetic Silica Glass

Green faceted gemstone earrings, likely synthetic emerald-colored glass or cubic zirconia

Undetermined; possible glass (amorphous silicate) or synthetic cubic zirconia (ZrO₂)

Opalite

Synthetic Opalised Glass

Opalite

Synthetic Opalite (Man-made glass)

Small clear crystal, possibly quartz or glass-like gemstone

Uncertain; likely quartz (SiO₂), but the image is insufficient to exclude man-made glass or cubic zirconia

Opalite (Synthetic Opalized Glass)

Synthetic Silicon Dioxide (SiO2) glass

Opalite

Synthetic glass / Opalized glass

Goldstone (Brown)

Aventurine glass

Blue-green faceted gemstone, possibly glass or synthetic material

Not identifiable from the image; possible synthetic spinel or glass

Gemstone ring (stone not identifiable)

Unknown; the small central stone may be a colorless gemstone or glass, and the surrounding metal is gold-colored alloy

Diamond (or Simulant)

Carbon (C) or relevant simulant formula (e.g., ZrO2 for Cubic Zirconia)

Opalite

Synthetic glass / Opaque silicious glass

Turquoise-colored bead necklace (likely dyed howlite or magnesite)

Likely dyed Ca₂B₅SiO₉(OH)₅ (howlite) or MgCO₃ (magnesite); turquoise is CuAl₆(PO₄)₄(OH)₈·4H₂O

Yellow jasper or polished yellow chalcedony

Microcrystalline quartz, SiO₂, likely iron-stained jasper/chalcedony

Diamond (or Diamond Simulant like Cubic Zirconia)

Carbon (C) - if Diamond; Zirconium dioxide (ZrO2) - if Cubic Zirconia

Clear Quartz crystals on a Matrix base (Geode fragment)

Silicon Dioxide (SiO2)

Blue cabochon gemstone ring

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

Diamond (or Simulant)

Carbon (C) or Cubic Zirconia (ZrO2)

Diamond (or Simulant)

Carbon (C) or Cubic Zirconia (ZrO2)