Synthetic (Man Made Glass)

Green glass-like cabochon, likely synthetic glass or resin

Unidentified green transparent material; possibly molded glass, synthetic spinel, or resin

Cubic Zirconia

Zirconium dioxide (ZrO2)

Colorless faceted gemstone, likely quartz (rock crystal)

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

Asphalt (Bituminous Concrete)

Bituminous Concrete / Pavement

Sea glass (likely pale blue glass)

Human-made silicate glass, likely soda-lime glass; not a natural mineral or rock

Synthetic Sapphire and Ion-X Glass

Single-crystal Alumina (Al2O3) and Ion-strengthened Aluminosilicate Glass

Green sea glass (likely)

Anthropogenic glass, not a mineral; composition commonly soda–lime silicate glass

Pink-red faceted gemstone, possibly synthetic corundum or spinel

Uncertain; possible ruby (corundum, Al₂O₃) or red spinel (MgAl₂O₄)

Clear faceted gemstone in an ornate metal bracelet

Unidentified transparent faceted stone; possibilities include quartz (SiO₂), zircon (ZrSiO₄), or glass—image alone cannot distinguish them

N/A - Man-made object (Jewelry Chain)

Antiqued or Oxidized Metal Chain (often Steel or Brass)

Strawberry Quartz (or Sunstone / Tumbled Quartz)

Silicon Dioxide (SiO2) with Hematite/Lepidocrocite inclusions

Faceted red gemstone, likely synthetic ruby or red spinel

Possibly corundum (Al₂O₃, ruby) or spinel (MgAl₂O₄); identity cannot be confirmed from the image

Sea Glass

Amorphous Silicon Dioxide (SiO2)

Man-made Metal Pin (Non-geological)

Antimony-Lead Alloy or Zinc/Brass Base with Electroplating

Ruby (in costume jewelry context)

Corundum (Al2O3) with Chromium impurities

Likely weathered pebble or mineral fragment

Indeterminate; possibly quartz-rich stone, iron-stained feldspar, or a small chert fragment

Colorless cut gemstone, likely white sapphire

Corundum (Al₂O₃), tentatively identified; the image alone cannot confirm the stone

Blue gemstone ring, likely sapphire

Corundum, Al₂O₃ (probable blue sapphire); surrounding stones may be diamonds or simulants

Pink/red faceted gemstone, likely synthetic corundum or glass imitation

Corundum (Al₂O₃), ruby/sapphire variety; exact identification requires testing

Faceted colorless gemstone, likely quartz or glass imitation

Most plausibly rock crystal (quartz, SiO₂); identity is uncertain because the photograph shows only intense facet reflections

Blue cabochon ring stone, likely sapphire or synthetic blue corundum

Corundum (Al₂O₃), possibly chromium/iron-titanium-bearing sapphire

Green Aventurine

Quartz with fuchsite inclusions (SiO2)

Green faceted gemstone, likely emerald or synthetic emerald

Beryl, Be₃Al₂Si₆O₁₈, colored green by chromium and/or vanadium; identity cannot be confirmed visually

Decorative opal-like turtle mosaic

Likely imitation or assembled opal material; exact stones cannot be confirmed visually

Likely blue sapphire ring

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

Faceted transparent gemstone, likely glass or cubic zirconia

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

Purple cabochon gemstone, likely amethyst or purple sapphire/spinel

Indeterminate from image; possible quartz (SiO₂), corundum (Al₂O₃), or spinel (MgAl₂O₄)

Smoky Quartz

Silicon Dioxide (SiO2)

Cubic Zirconia (simulant) or Diamond

ZrO2 (Cubic Zirconia) or C (Diamond)

Iridescent polished gemstone, likely opal

Common or precious opal (hydrated amorphous silica, SiO₂·nH₂O), possibly synthetic or glass imitation

Amethyst cabochon ring

Amethyst, purple quartz (SiO₂)

Diamond-set gold ring (stone identity uncertain)

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

Blue Sapphire (likely lab-grown or treated)

Corundum (Aluminum Oxide, Al2O3)

Red faceted gemstone, possibly ruby

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

Ruby (rough or poorly polished corundum)

Corundum, Al₂O₃; red gem-quality corundum is ruby

Colorless faceted gemstone, likely quartz

Quartz (SiO₂), probably rock crystal; exact identification is uncertain from the strongly backlit image

Spinel

Magnesium Aluminum Oxide (MgAl2O4)

Smoky Quartz

Smoky Quartz (Silicon Dioxide, SiO2)

Blue glass-like cabochon, likely dyed or synthetic material

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

Porcelain (Stoneware Ceramic)

Mullite / Silica-glass composite (Al6Si2O13)

Colorless faceted gemstone (likely cubic zirconia)

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

Sea Glass

Anthropogenic Silicate Glass