Synthetic Mineral Simulant

Opalite (Man-made Glass)

Synthetic Silicon Dioxide Glass (SiO2 + metal oxides)

Cubic Zirconia (as used in jewelry setting)

Zirconium dioxide (ZrO2)

Faceted Quartz or Cubic Zirconia

SiO2 (Quartz) or ZrO2 (Cubic Zirconia)

Clear Quartz (Faceted) or Cubic Zirconia / Glass imitation

SiO2 (if Quartz), ZrO2 (if Cubic Zirconia)

Cubic Zirconia

Zirconium dioxide (ZrO2)

Colorless faceted gemstone, likely glass or cubic zirconia

Probably cubic zirconia (zirconium dioxide, ZrO₂); diamond cannot be confirmed visually

Faceted Clear Gemstone (Likely Quartz or Cubic Zirconia)

Silicon Dioxide (SiO2) or Zirconium Dioxide (ZrO2)

Faceted Clear Quartz or Diamond Simulant

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

Faceted gemstones, likely assorted quartz or glass-like gems

Not determinable from the photograph; possible quartz (SiO₂), topaz, or synthetic cubic zirconia

Silicon Carbide (Carborundum)

Moissanite (SiC)

Opalite

Synthetic Glass (Hydrated Silica Simulant)

Green glass-like cabochon, likely synthetic glass or resin

Unidentified green transparent material; possibly molded glass, synthetic spinel, or resin

Cubic Zirconia (simulant) or Diamond

ZrO2 (Cubic Zirconia) or C (Diamond)

Faceted transparent gemstone, likely glass or cubic zirconia

Uncertain from image; possible cubic zirconia (zirconium dioxide, ZrO₂) or glass imitation

Diamond (or Cubic Zirconia)

Carbon (C) or Zirconium Dioxide (ZrO2)

Cubic Zirconia (CZ)

Cubic Zirconium Dioxide (ZrO2)

Diamond (or Cubic Zirconia simulant)

Carbon (C) / Zirconium Dioxide (ZrO2)

Cubic Zirconia

Zirconium dioxide (ZrO2)

Cubic Zirconia (Faceted)

Zirconium dioxide (ZrO2)

Green Obsidian Sphere (man-made glass)

Vitreous Silica with Chromium/Iron additives

Diamond (or synthetic simulant)

Cubic C (Carbon)

Opalite

Synthetic Glass / Man-made Opal Simulant

Diamond (or Cubic Zirconia simulant)

C (Carbon) or ZrO2 (Zirconium Dioxide)

Clear Quartz (faceted) / Diamond Simulant

Silicon Dioxide (SiO2) / Cubic Zirconia (ZrO2)

Cubic Zirconia

Cubic Zirconium Dioxide (ZrO2)

Cubic Zirconia

Zirconium Dioxide (ZrO2)

Small blue cut gemstone, possibly synthetic spinel or glass; species cannot be determined from the photo

Undetermined; blue synthetic spinel (MgAl₂O₄) is one possibility

Cubic Zirconia (as a jewelry specimen)

Zirconium dioxide (ZrO2)

Cubic Zirconia (CZ)

Zirconium dioxide (ZrO2)

Blue glass-like gemstone, likely synthetic spinel or glass

Uncertain; possibilities include synthetic cobalt-blue spinel (MgAl₂O₄) or cobalt-colored glass

Red glassy mineral specimen, likely synthetic ruby or red spinel

Most consistent with synthetic corundum (Al₂O₃, ruby) or synthetic spinel (MgAl₂O₄); exact identification requires testing

Loose faceted colorless gemstones, likely quartz or glass-like mineral chips

Most consistent with quartz (SiO₂), though the photograph cannot exclude synthetic cubic zirconia or glass

Diamond (or Diamond Simulant)

C (Carbon) or synthetic equivalent

Diamond (or Diamond Simulant)

Carbon (C) if diamond, various if simulant

Silicon Carbide (Carborundum)

Moissanite (SiC), though mostly synthetic

Ruby (Faceted)

Corundum (Al2O3:Cr)

Cubic Zirconia

Zirconium dioxide (ZrO2)

Cubic Zirconia (Set in Jewelry)

Zirconium Dioxide (ZrO2)

Cubic Zirconia (Diamond Simulant)

Zirconium Dioxide (ZrO2)

Pink faceted gemstone, likely synthetic cubic zirconia or pink sapphire

Uncertain from image; possible zirconium dioxide (cubic zirconia, ZrO₂) or corundum (pink sapphire, Al₂O₃)

Clear faceted gemstone, likely synthetic cubic zirconia

Cubic zirconia (zirconium dioxide, ZrO₂); visual identification is not definitive and diamond or synthetic moissanite are alternatives

Diamond (or Cubic Zirconia)

Crystallized Carbon (C) for Diamond; Zirconium Dioxide (ZrO2) for CZ