Synthetic Polymer (Synthetic Material)

Black onyx or black spinel ring stone

Likely chalcedony (SiO₂), variety black onyx; possibly synthetic spinel or glass

Faceted glass-like gemstone (likely synthetic quartz or cubic zirconia)

Identification uncertain; possibilities include synthetic quartz (SiO₂) or cubic zirconia (ZrO₂)

Tanzanite earrings

Tanzanite, blue-violet zoisite (Ca₂Al₃(SiO₄)₃(OH))

Opalite

Man-made Opalized Glass (Synthetic Glass)

Faceted red gemstone, likely ruby

Corundum (Al₂O₃), colored red by chromium; identity cannot be confirmed from the image alone

Oil Shale

Kerogen-rich marlstone

Likely blue sapphire ring

Corundum (Al₂O₃), likely sapphire; surrounding stones may be diamonds or colored gems

Milky Quartz

Silicon Dioxide (SiO2)

Blue gemstone ring, likely synthetic or natural blue topaz

Topaz, Al₂SiO₄(F,OH)₂ (visual identification uncertain)

Red gemstone ring, likely synthetic ruby

Corundum (Al₂O₃), chromium-bearing; possibly lab-created ruby or red glass imitation

Tumbled turquoise cabochon

Turquoise, CuAl₆(PO₄)₄(OH)₈·4H₂O

Green glassy cabochon, likely dyed or synthetic material

Uncertain; possibly green obsidian, chrysoprase, or synthetic glass

Clear-stone silver-tone teardrop earring

The stones may be colorless quartz or glass; the image does not allow reliable identification. Metal setting appears silver-tone.

Colorless faceted gemstone, likely quartz (rock crystal)

Quartz, silicon dioxide (SiO₂); exact identification cannot be confirmed from the photograph

Faceted purple gemstone, likely amethyst

Quartz (SiO₂), purple variety colored by trace iron and natural irradiation

Faceted red ruby

Corundum (Al₂O₃), colored red by chromium

Emerald

Beryl (Be3Al2(SiO3)6) with Chromium/Vanadium impurities

Green cabochon gemstone pendant, likely turquoise or dyed green turquoise

Probably turquoise, CuAl₆(PO₄)₄(OH)₈·4H₂O; exact identification requires testing

Amber (likely opaque/burnished amber)

Fossilized plant resin; primarily polymerized terpenoid resin (succinite-type amber)

Aura Quartz

Silicon Dioxide (SiO2) with Titanium/Metal vapor coating

Dalmatian Stone

Dalmatian Jasper (a misnomer) / Perthitic Feldspar Rock

Diamond (Faceted Colorless)

Diamond (Pure Carbon, C)

Clear Quartz (faceted) / Diamond Simulant

Silicon Dioxide (SiO2) / Cubic Zirconia (ZrO2)

Iridescent polished/tumbled stone (likely coated quartz or glassy synthetic material)

Indeterminate; possibly quartz (SiO₂) with an artificial iridescent coating

Blue Goldstone

Aventurine Glass (SiO2 with Co and metallic inclusions)

Goldstone (Synthetic Aventurescence Glass)

Cuprous Aventurescent Glass (Silicon Dioxide with Copper inclusions)

Diamond or Cubic Zirconia

Carbon (diamond) or Zirconium dioxide (cubic zirconia)

Blue gemstone ring (likely sapphire)

Likely corundum, Al₂O₃; the dark, reflective appearance may also indicate a treated or synthetic stone.

Cubic Zirconia

Zirconium dioxide (ZrO2)

Lapis Lazuli (Tumbled Stone)

Na6Ca2(Al6Si6O24)(SO4,S,Cl)2 (predominantly Lazurite)

Silicon Carbide (Carborundum)

Silicon Carbide (SiC)

Tumbled amethyst

Amethyst, purple quartz (SiO₂)

Diamond (or Cubic Zirconia simulant)

C (Carbon) or ZrO2 (Zirconium Dioxide)

Peridot gemstone pendant

Olivine, gem-quality forsteritic olivine (approximately (Mg,Fe)₂SiO₄)

Red tourmaline (rubellite), faceted gemstone

Elbaite, a lithium-bearing tourmaline; Na(Li₁.₅Al₁.₅)Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)

Mounted clear gemstone, likely cubic zirconia

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

Pink quartz (likely rose quartz)

Quartz, silicon dioxide (SiO₂), likely rose quartz; possibly lab-created or treated

White seed-bead gemstone strand, likely freshwater pearl or shell pearl

Pearl: nacreous calcium carbonate, chiefly aragonite (CaCO₃) in conchiolin; identification uncertain from image

Blue Sapphire

Corundum (Al2O3)

Red faceted gemstone, possibly ruby

Corundum (Al₂O₃), if ruby; image alone cannot confirm identity or natural origin

Colorless faceted gemstones, likely quartz (rock crystal)

Quartz, silicon dioxide (SiO₂), trigonal crystal system

Blue-violet faceted gemstone, likely amethyst

Quartz (SiO₂), purple variety colored mainly by iron impurities and irradiation