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)

Faceted clear gemstone in a gold-colored ring

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

Clear Quartz (Faceted) or Cubic Zirconia / Glass imitation

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

Opalite

Synthetic glass (Opalite simulant)

Cut purple gemstone, likely synthetic cubic zirconia or glass

Undetermined; possible cubic zirconia (ZrO₂)

Cubic Zirconia

Zirconium dioxide (ZrO2)

Diamond-set gold ring

Diamond (carbon, C) in a gold-alloy setting; the stone may be a diamond or a diamond simulant

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

Opalite

Synthetic Glass (Hydrated Silica Simulant)

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)

Cubic Zirconia (simulant) or Diamond

ZrO2 (Cubic Zirconia) or C (Diamond)

Green glass-like cabochon, likely synthetic glass or resin

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

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)

Opalite

Synthetic Glass / Man-made Opal Simulant

Diamond (or synthetic simulant)

Cubic C (Carbon)

Diamond (or Cubic Zirconia simulant)

Carbon (C) / Zirconium Dioxide (ZrO2)

Cubic Zirconia (CZ)

Cubic Zirconium Dioxide (ZrO2)

Cubic Zirconia

Zirconium dioxide (ZrO2)

Diamond (or Cubic Zirconia simulant)

Carbon (C) / Zirconium dioxide (ZrO2)

Cubic Zirconia (Faceted)

Zirconium dioxide (ZrO2)

Small clear faceted gemstone, possibly cubic zirconia

Unconfirmed; cubic zirconia (ZrO₂) is a possibility, but diamond or another colorless stone cannot be identified from this image alone

Green gemstone ring (likely synthetic or imitation emerald)

Possibly emerald, beryl (Be₃Al₂Si₆O₁₈); the photo cannot confirm the center stone’s identity or whether it is natural.

Green Obsidian Sphere (man-made glass)

Vitreous Silica with Chromium/Iron additives

Red faceted gemstone, likely synthetic ruby

Corundum (Al₂O₃); ruby when red, possibly laboratory-grown

Clear Quartz (faceted) / Diamond Simulant

Silicon Dioxide (SiO2) / Cubic Zirconia (ZrO2)

Diamond (or Cubic Zirconia simulant)

C (Carbon) or ZrO2 (Zirconium Dioxide)

Cubic Zirconia

Cubic 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

Zirconium Dioxide (ZrO2)

Cubic Zirconia (as a jewelry specimen)

Zirconium dioxide (ZrO2)

Diamond (or Diamond Simulant / Melee)

Carbon (C) / or synthetic cubic zirconia (ZrO2)

Cubic Zirconia (CZ)

Zirconium dioxide (ZrO2)

Diamond (or Diamond Simulant)

Carbon (C) if diamond, various if simulant

Blue glass-like gemstone, likely synthetic spinel or glass

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

Diamond (or Diamond Simulant)

C (Carbon) or synthetic equivalent

Silicon Carbide (Carborundum)

Moissanite (SiC), though mostly synthetic