Mineralogical Simulant

Clear Quartz (Faceted) or Cubic Zirconia / Glass imitation

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

Colorless faceted gemstone, likely glass or cubic zirconia

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

Colorless faceted gemstone (likely glass or cubic zirconia)

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

Diamond (or Simulant)

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

Diamond (or Simulant)

Carbon (C) or Cubic Zirconia (ZrO2)

Diamond (or Simulant)

Carbon (C) or Cubic Zirconia (ZrO2)

Diamond (or Simulant)

Carbon (C)

Clear gemstone earring (likely cubic zirconia)

Cubic zirconia (synthetic zirconium dioxide, ZrO₂); identification from the image is uncertain

Cubic Zirconia (or possibly Diamond)

Zirconium dioxide (or Carbon)

Painted beach pebble

Unidentified natural pebble; underlying lithology cannot be determined from the image

sedimentary

Opalite

Synthetic glass (Opalite simulant)

Diamond (or diamond simulant)

Cubic Zirconia (simulant) or Diamond

ZrO2 (Cubic Zirconia) or C (Diamond)

Black-and-white spotted jasper (likely dalmatian jasper), polished beads

Commercially called Dalmatian jasper; typically a feldspar-rich rock with dark inclusions, not true jasper (microcrystalline quartz). Exact composition cannot be confirmed from the image.

Cut purple gemstone, likely synthetic cubic zirconia or glass

Undetermined; possible cubic zirconia (ZrO₂)

Diamond (or Simulant)

Carbon (C) or various simulants (e.g., Cubic Zirconia)

Diamond (or Simulant)

Carbon (C)

Diamond (or Simulant)

Carbon (C)

Diamond (or Diamond Simulant)

C (Carbon) or synthetic equivalent

Banding Onyx Marble

Calcite / Travertine

Diamond-set gold ring

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

Onyx Marble

Calcite (CaCO3) or Aragonite

Mixed mineral and shell specimen assortment

Primarily unidentified quartz-/feldspar-like pebbles with possible dark basalt or iron-rich fragments; white pieces may include shell or calcite

Gold ring with a clear faceted gemstone

Likely colorless diamond (carbon, C); identification from the image is uncertain

Clear Quartz (Faceted)

SiO2 - Silicon Dioxide

Yellow faceted gemstone, likely synthetic cubic zirconia or glass; species cannot be confirmed from the image

Undetermined; possible cubic zirconia (ZrO₂), a manufactured gemstone simulant

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

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

Pink faceted gemstone, likely synthetic cubic zirconia or pink sapphire

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

Cubic Zirconia (Set in Jewelry)

Zirconium Dioxide (ZrO2)

Serpentinite

Serpentinite (composed primarily of Serpentine group minerals, e.g., Antigorite, Lizardite, or Chrysotile)

Diamond (or Diamond Simulant)

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

Citrine

Silicon Dioxide (SiO2)

Faceted Clear Quartz or Diamond Simulant

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

Clear faceted gemstone, likely cubic zirconia

Cubic zirconia (synthetic zirconium dioxide, ZrO₂); visual identification is uncertain and diamond or another colorless stone is possible.

Cubic Zirconia

Zirconium dioxide (ZrO2)

Silicon Carbide (Carborundum)

Moissanite (SiC)

Pistachio-green and dark mineral-bearing rock, possibly serpentine with dark inclusions

Undetermined; the image is insufficient for reliable species-level identification