Mineralogical Simulant

Pyrite Sun (Pyrite Dollar)

Iron Disulfide (FeS2)

Diamond ring (likely clear cut gemstone)

Diamond, crystalline carbon (C)

Faceted clear gemstone in a gold-colored ring

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

Diamond stud earrings

Diamond, crystalline carbon (C)

Colorless faceted gemstone, likely glass or cubic zirconia

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

Tumbled dalmatian jasper (likely)

Trade name for a spotted, silica-rich rock; commonly quartz/chalcedony with dark inclusions, though this specimen may be another spotted feldspar-bearing stone

Silicon Carbide (Carborundum)

Silicon Carbide (SiC) / Moissanite (natural)

Moissanite

Silicon Carbide (SiC)

Green serpentine pebble (possibly serpentine-rich rock)

Serpentinite, composed chiefly of serpentine-group minerals such as antigorite, lizardite, or chrysotile; exact identification requires testing

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 Diamond Simulant)

Carbon (C) if diamond, various if simulant

Serpentinite

Serpentine group minerals (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4

Blue Zircon

Zircon (Zirconium Silicate - ZrSiO4)

Cubic Zirconia

Zirconium dioxide (ZrO2)

Serpentine

Antigorite/Lizardite/Chrysotile group, Mg3Si2O5(OH)4

Serpentinite

Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4

Cubic Zirconia

Zirconium dioxide (ZrO2)

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

Diamond-encrusted microphone-shaped pendant

Diamond (natural or synthetic) set in gold-colored metal; exact stones and metal cannot be confirmed visually

Blue-stone and diamond ring

Blue stone is possibly blue sapphire (corundum, Al₂O₃); surrounding stones appear to be diamonds (carbon, C).

Blue faceted gemstone, likely synthetic spinel or sapphire

Undetermined from image; possible synthetic corundum (Al₂O₃) or spinel (MgAl₂O₄)

Diamond-set gold ring (stone identity uncertain)

Possible diamond (crystalline carbon, C); metal setting appears gold-colored

Colorless faceted gemstone, likely synthetic cubic zirconia

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

Diamond (or Diamond Simulant)

Carbon (C)

Diamond (or Diamond Simulant like Cubic Zirconia)

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

Diamond or Cubic Zirconia

Carbon (diamond) or Zirconium dioxide (cubic zirconia)

Diamond (or Cubic Zirconia simulant)

C (Carbon) or ZrO2 (Zirconium Dioxide)

Tumbled, mottled stone (possibly jasper or another ornamental rock)

Undetermined from the photograph; visual appearance is insufficient for a reliable species identification

River Pebbles

Polymictic Gravel

Flint or chert fragment

Microcrystalline quartz (SiO₂), commonly termed chert or flint

Weathered brown rock fragment, possibly iron-rich sandstone or altered basalt

Indeterminate; likely an iron-oxide–stained silicate rock

Polished banded calcite/aragonite tower

Calcite (CaCO₃), possibly aragonite (CaCO₃)

Serpentine

Antigorite/Chrysotile/Lizardite mixture (Mg,Fe)3Si2O5(OH)4

Cubic Zirconia (as used in jewelry setting)

Zirconium dioxide (ZrO2)

Cubic Zirconia

Zirconium Dioxide (ZrO2)

Cubic Zirconia (CZ) in Gold-Plated Setting

Cubic Zirconium Dioxide (ZrO2)

Faceted Clear Gemstone (Likely Quartz or Cubic Zirconia)

Silicon Dioxide (SiO2) or Zirconium Dioxide (ZrO2)

Uncertain dark gray-brown rock fragment

Indeterminate; possibly weathered chert, serpentine, or iron-stained quartzite

Yellow Jade (Serpentine/Quartz)

Silicate mineral aggregate

Dalmatian jasper (likely orbicular microgranite)

Quartz–feldspar–biotite/pyroxene microgranite; commonly marketed as Dalmatian jasper

Dendritic Quartz

Silicon Dioxide (SiO2) with Manganese Oxide inclusions

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.