Man Made Object (Simulant)

Fossil coral

Fossilized colonial coral, likely rugose or tabulate coral preserved in limestone

Faceted Clear Gemstone (Likely Quartz or Cubic Zirconia)

Silicon Dioxide (SiO2) or Zirconium Dioxide (ZrO2)

Tumbled milky chalcedony (likely common opal or quartz-rich chalcedony)

Chalcedony, microcrystalline SiO₂; identification is uncertain from the photo

Tumbled yellow chalcedony (possibly citrine or pale agate)

Chalcedony, microcrystalline quartz (SiO₂); exact variety cannot be confirmed visually

Polished stromatolite (likely fossilized microbial mat)

Fossil stromatolite; chiefly microcrystalline quartz (SiO₂), commonly replacing carbonate

Turquoise ring

Turquoise, CuAl₆(PO₄)₄(OH)₈·4H₂O; the setting appears to be silver-colored metal

Gem-set gold ring

Likely a faceted diamond (carbon, C) set in a gold-alloy ring; the surrounding stones are not identifiable from the image.

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

Diamond (or Cubic Zirconia)

Carbon (C) or Zirconium Dioxide (ZrO2)

Dark green cabochon gemstone ring

Unknown; possibly green onyx (cryptocrystalline quartz, SiO₂) or another green gem

Goldstone (aventurine glass)

Man-made copper-bearing glass; not a natural mineral (commonly sold as blue/brown goldstone)

Painted Rock / Geode Specimen

Silicon Dioxide with artificial pigment coating

Possible yellow agate or chalcedony bead

Microcrystalline quartz (SiO₂), likely chalcedony; identification is uncertain from the photo

Red agate bead (likely dyed or treated)

Agate, a microcrystalline variety of quartz; SiO₂

Faceted transparent gemstone, likely glass or cubic zirconia

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

Cubic Zirconia (as a jewelry specimen)

Zirconium dioxide (ZrO2)

Tumbled chalcedony pendant (likely agate)

Chalcedony, microcrystalline quartz (SiO₂); the pale bands suggest agate

Dyed Crackle Quartz

Silicon Dioxide (SiO2) with synthetic dye

Red gemstone ring (likely synthetic ruby or red glass)

Possibly corundum (Al₂O₃), chromium-colored; identity cannot be confirmed from the image

Red jasper (likely)

Jasper, an opaque microcrystalline variety of quartz (SiO₂), colored red by iron oxides

Goldstone

N/A (Synthetic Glass with Copper Inclusions)

Diamond (or Diamond Simulant)

Carbon (C) or Zirconium dioxide (ZrO2) for CZ

Chert (likely flint)

Microcrystalline quartz, SiO₂

Black tourmaline (likely schorl)

Schorl, NaFe3Al6(BO3)3Si6O18(OH)4

Dyed Dragon Vein Agate

Silicon Dioxide (SiO2) with artificial pigment

Diamond (or Diamond Simulant)

Carbon (C)

Diamond (or Diamond Simulant)

Carbon (C) - Native Element

Black onyx bead necklace

Black chalcedony, a microcrystalline quartz variety (SiO₂); beads may be dyed or treated

Diamond (or Cubic Zirconia / Rhinestones)

Carbon (C) or Zirconium dioxide (ZrO2)

Green jasper (possibly dyed or coated)

Microcrystalline quartz, SiO₂; jasper is an opaque variety of chalcedony

Goldstone (with Tiger's Eye and Quartz)

Aventurine glass (Synthetic SiO2 with Cu inclusions)

Man-made Carved Stone (Scream Mask/Skull motif)

Carved Soapstone or Serpentine-rich rock

Blue Impression Jasper beads

Impression jasper (microcrystalline quartz/chalcedony), chiefly SiO₂, with iron-oxide and other mineral inclusions

Quartz geode with druzy crystals

Quartz (SiO₂), likely with iron-oxide staining and darker host rock

Unidentified Small Rock

Unknown

Cubic Zirconia (Faceted)

Zirconium dioxide (ZrO2)

Man-made Synthetic Material (Not a rock or mineral)

Polyester (Polyethylene terephthalate) / Faux Fur

Man-made Synthetic Material (Costume Faux Fur)

Synthetic Polymer (Polyester/Acrylic)

Blue Sapphire (Synthetic or Man-made Glass Imitation)

Corundum (Al2O3) if natural; Lead-glass or Spinal if synthetic

Terracotta (Man-made ceramic brick fragment)

Baked clay / High-iron ceramic (Silicate-based ceramic)

Diamond (or Cubic Zirconia simulant)

C (Carbon) or ZrO2 (Zirconium Dioxide)

Chert (Arrowhead/Artifact Fragment)

Microcrystalline or Cryptocrystalline Quartz (SiO2)