Synthetic (Man Made Glass)

Opal-like cabochon ring stone

Likely common opal (hydrated amorphous silica, SiO₂·nH₂O); exact material uncertain from the photograph

Blue glass-like gemstone specimen (likely dyed or synthetic quartz)

Uncertain; possibly blue-dyed quartz or synthetic glass, not confidently identifiable from the image

Red faceted gemstone jewelry setting

Likely synthetic ruby or red spinel centerpiece with colorless accent stones; exact identification requires gemological testing

Faceted Diamond or Cubic Zirconia

Carbon (C) for Diamond; Zirconium dioxide (ZrO2) for CZ

Green glassy gemstone-like specimen

Likely synthetic glass or treated quartz; exact identification requires testing

Ruby (Faceted)

Corundum (Al2O3:Cr)

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

Alexandrite: chrysoberyl, BeAl₂O₄; exact identification requires gemological testing

Red corundum (ruby-colored polished crystal)

Corundum, aluminum oxide (Al₂O₃); red color is typically caused by chromium

Polished purple gemstone, likely amethyst

Amethyst: purple quartz, silicon dioxide (SiO₂)

Blue sapphire ring

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

Polished pink corundum (likely treated ruby)

Corundum, aluminum oxide (Al₂O₃); ruby when red-to-pink from chromium

Tumbled tiger’s-eye

Quartz variety, fibrous golden-brown SiO₂ (pseudomorphic quartz after crocidolite)

Blue gemstone, likely tumbled sapphire or blue spinel

Corundum (Al₂O₃) if sapphire; alternatively spinel (MgAl₂O₄)

Faceted pale-green gemstone, likely prasiolite or green quartz

Quartz (SiO₂), likely prasiolite; identification is uncertain from the photograph

Blue Sapphire

Corundum (Al2O3)

Blue glass-like cabochon, likely dyed or synthetic material

Uncertain; possibly dyed chalcedony, synthetic spinel, or blue glass

Amethyst cabochon

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

Green faceted bead strand, likely dyed or synthetic material

Uncertain; possibly green-dyed quartz, glass, or lab-created emerald-like material

Green faceted gemstone, likely emerald

Beryl, Be₃Al₂Si₆O₁₈, colored green by chromium and/or vanadium

Tumbled amethyst

Amethyst, purple quartz (SiO₂), colored by trace iron and irradiation

Colorless Gemstone (possibly Diamond or Cubic Zirconia)

C (Diamond) or ZrO2 (Cubic Zirconia)

Diamond (or Cubic Zirconia)

Cubic Carbon (C) or Zirconium Dioxide (ZrO2)

Colorless faceted gemstone (likely cubic zirconia)

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

Star sapphire ring

Corundum (Al₂O₃), likely asteriated sapphire

Rainbow Hematite / Magnetic Hematite

Iron oxide (Fe2O3) - often synthetic/coated for beads

Pink quartz (likely rose quartz)

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

Milky Quartz

Crystalline Silicon Dioxide (SiO2)

Strawberry Quartz and Rose Quartz

Silicon Dioxide (SiO2) with inclusions

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

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

Slag (Anthropogenic Glass/Iron byproduct)

Ferro-silicate Slag

Blue Slag Glass

Amorphous Silica (Byproduct of smelting)

Porcelain (Stoneware Ceramic)

Mullite / Silica-glass composite (Al6Si2O13)

Gemstone-set silver jewelry piece

Likely mixed faceted gemstones in a silver-colored metal setting; stones may include sapphire, ruby/garnet, and yellow sapphire or citrine, but the image is insufficient for species-level identification.

Faceted clear quartz (rock crystal), likely a cut imitation or low-grade gemstone

Quartz, silicon dioxide (SiO₂)

Blue-and-white opalite sphere

Opalite (commercial synthetic or glass-based imitation; not true opal), typically silica glass or synthetic opalescent material

Green glassy cabochon, likely dyed or synthetic material

Uncertain; possibly green obsidian, chrysoprase, or synthetic glass

Tumbled green beryl or glassy green gemstone

Likely beryl, Be₃Al₂Si₆O₁₈; possibly treated emerald or synthetic glass

Blue aventurine quartz (likely)

Quartz, silicon dioxide (SiO₂), probably blue aventurine variety

Blue slag glass / industrial glass fragment

Artificial silicate glass, composition variable; likely copper- or cobalt-colored furnace slag

Green Glass Slag

Amorphous Silicon Dioxide (SiO2) with metal oxide impurities

Green Aventurine

Quartz (SiO2) with Fuchsite inclusions

Green faceted gemstone, likely tsavorite garnet

Tsavorite: green grossular garnet, Ca₃Al₂(SiO₄)₃