Mineral Simulant (Synthetic Glass)

Clear faceted gemstone, likely quartz (rock crystal)

Quartz, silicon dioxide (SiO₂); visual identification is uncertain because the stone is heavily faceted and photographed with flash

Cubic Zirconia (Set in Jewelry)

Zirconium Dioxide (ZrO2)

Red gemstone ring, likely synthetic ruby or red spinel

Ruby: corundum (Al₂O₃); spinel: MgAl₂O₄; exact identity requires testing

Cubic Zirconia

Zirconium dioxide (ZrO2)

Colorless faceted gemstone, likely cubic zirconia or diamond

Uncertain from image; cubic zirconia (ZrO₂) is a common diamond simulant, while diamond is crystalline carbon (C)

Faceted citrine-colored gemstone

Likely citrine (quartz, SiO₂); possibly yellow glass or synthetic gem

Colorless faceted gemstone, likely glass or cubic zirconia

Uncertain; possible cubic zirconia (zirconium dioxide, ZrO₂) or synthetic glass

Colorless faceted gemstone, likely cubic zirconia

Synthetic cubic zirconia (zirconium dioxide, ZrO₂); identity is visual and not definitive

Pink faceted gemstone, likely synthetic cubic zirconia or pink sapphire

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

Colorless faceted gemstone (likely cubic zirconia)

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

Clear faceted gemstone, likely synthetic cubic zirconia

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

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

Alexandrite: chrysoberyl, BeAl₂O₄; exact identification requires gemological testing

Colorless faceted gemstone, likely glass or quartz

Uncertain; possibly quartz (SiO₂), but the strong uniform brilliance and apparent molded/faceted form may indicate leaded glass or cubic zirconia

Pink/red faceted gemstone, likely synthetic corundum or glass imitation

Corundum (Al₂O₃), ruby/sapphire variety; exact identification requires testing

Diamond (or Cubic Zirconia)

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

Blue glass-like heart pendant, likely synthetic blue spinel or colored glass

Unconfirmed; possibly synthetic spinel (MgAl₂O₄) or cobalt-colored glass

Sapphire

Corundum (Al2O3)

Cubic Zirconia (Faceted)

Zirconium dioxide (ZrO2)

Diamond or Cubic Zirconia

Carbon (diamond) or Zirconium dioxide (cubic zirconia)

Colorless faceted gemstone, likely cubic zirconia

Cubic zirconia (synthetic ZrO₂), possibly glass or quartz

Cut gemstone ring, likely diamond

Diamond (carbon, C), faceted gemstone; exact stone identification is uncertain from the image

Cubic Zirconia (Diamond Simulant)

Zirconium Dioxide (ZrO2)

Diamond (or Diamond Simulant)

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

Faceted blue gemstone ring, likely synthetic spinel or glass; identity uncertain

Possibly synthetic blue spinel (MgAl₂O₄) or laboratory sapphire (Al₂O₃); the clear side stones may be cubic zirconia or glass

Diamond (or Diamond Simulant)

Native Carbon (C)

Blue sapphire ring

Corundum (aluminum oxide, Al₂O₃), likely heat-treated sapphire

Clear faceted gemstone, likely cubic zirconia

Synthetic zirconium dioxide (ZrO₂), probably cubic zirconia; exact identification requires testing

Diamond (or Cut Gemstone / Cubic Zirconia)

Carbon (C)

Diamond (or Diamond Simulant)

Carbon (C)

Colorless faceted gemstone (likely glass or cubic zirconia)

Likely cubic zirconia, ZrO₂; exact identification is uncertain from the photograph

Colorless faceted gemstone, likely synthetic cubic zirconia

Cubic zirconia (zirconium dioxide, ZrO₂); natural diamond is a less likely alternative

Diamond (or Cubic Zirconia simulant)

Carbon (C) - Diamond / Zirconium dioxide (ZrO2) - CZ

Colorless faceted gemstone, likely cubic zirconia

Synthetic cubic zirconia (ZrO₂), tentative; possibly diamond or synthetic moissanite

Pink Cubic Zirconia (CZ)

Zirconium Dioxide (ZrO2)

Cubic Zirconia (CZ) Jewelry

Zirconium dioxide (ZrO2)

Mounted clear gemstone, likely cubic zirconia

Cubic zirconia (zirconium dioxide, ZrO₂), synthetic; exact stone cannot be confirmed from the image

Colorless faceted gemstone (most likely synthetic cubic zirconia)

Cubic zirconia, ZrO₂ (likely synthetic); natural alternatives include quartz or diamond

Faceted clear gemstone, likely quartz (rock crystal)

Quartz, silicon dioxide (SiO₂); exact identity is uncertain because the strong flash and cut obscure diagnostic features

Diamond ring (likely diamond with gold band)

Diamond, crystalline carbon (C); band appears gold alloy

Colorless faceted gemstone, likely cubic zirconia

Cubic zirconia (synthetic zirconium dioxide, ZrO₂); possibly colorless quartz or laboratory diamond

Faceted transparent gemstone pendant

Likely cubic zirconia (zirconium dioxide, ZrO₂); possibly diamond or synthetic moissanite

Hematite

Iron(III) oxide (Fe2O3)