Synthetic (Not A Natural Rock)

Tumbled hematite

Hematite (Fe₂O₃), commonly sold as “magnetic hematite” when synthetic or magnetized

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

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

Cut red gemstone, likely ruby

Ruby, gem-quality corundum (Al₂O₃) colored by chromium

Diamond (Heart Cut)

Carbon (C)

Yellow faceted gemstone, likely citrine or yellow sapphire

Uncertain; probable quartz (SiO₂) or corundum (Al₂O₃)

Ruby (faceted gemstone in a ring)

Corundum, Al₂O₃; red color typically from trace chromium

Smoky Quartz

Silicon Dioxide (SiO2)

Amethyst (Tumbled)

Silicon Dioxide (SiO2) with Fe3+ impurities

Blue sapphire (rough corundum)

Corundum, Al₂O₃; blue color commonly from trace iron and titanium

Diamond (Faceted Gemstone)

Native Carbon (C)

Artisanal Glass Beads (Simulated Goldstone or Aventurine Glass)

Silicon Dioxide (SiO2) with metallic inclusions

Diamond ring

Diamond, crystalline carbon (C), likely colorless or near-colorless brilliant-cut stones set in gold

Polished gemstone tower assortment

Primarily quartz varieties and simulants; apparent amethyst (SiO₂), rose quartz (SiO₂), clear quartz (SiO₂), fluorite (CaF₂), sodalite, malachite, and possibly dyed or composite stones

Blue faceted gemstones, likely blue sapphire

Corundum (Al₂O₃), blue varieties colored chiefly by iron and titanium

Blue cabochon, likely dyed or synthetic material

Undetermined; possibly dyed chalcedony (SiO₂), glass, or synthetic corundum

Blue sapphire ring

Corundum, Al₂O₃; blue color typically from trace iron and titanium

Hematite

Iron(III) oxide (Fe2O3)

Diamond (or high-quality simulant like Cubic Zirconia)

Carbon (C) - Native Element

Red corundum gemstone (likely synthetic ruby)

Ruby: corundum, aluminum oxide (Al₂O₃), chromium-colored; likely lab-grown material

Rough Citrine Quartz

Silicon Dioxide (SiO2) with ferric iron impurities

Cubic Zirconia (Diamond Simulant)

Zirconium Dioxide (ZrO2)

Black spinel bead bracelet

Spinel (magnesium aluminate), MgAl₂O₄

Grey River Pebble (Likely Quartz-rich or Limestone)

Clastic Sedimentary Rock (typically SiO2 or CaCO3 based)

Likely blue sapphire ring

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

Red garnet (likely almandine or pyrope)

Garnet-group silicate; almandine Fe₃Al₂(SiO₄)₃ or pyrope Mg₃Al₂(SiO₄)₃

Blue sapphire ring

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

Yellow faceted gemstone earrings, likely citrine or yellow beryl

Citrine: quartz, SiO₂; possible yellow beryl: Be₃Al₂Si₆O₁₈

Iron-stained quartzite (likely)

Quartz-rich quartzite, predominantly SiO₂, with iron-oxide staining

Blue glass-like gemstone, likely synthetic spinel or glass

Uncertain; possibilities include synthetic cobalt-blue spinel (MgAl₂O₄) or cobalt-colored glass

Opalite

Synthetic glass / Opaque silicious glass

Man-made Polished Porcelain Tile (Artificial Geologic Lookalike)

Fused Silicate Ceramic with Alumina (Synthetic Kaolinite derivative)

Opalite

Synthetic Fluorescent Glass (SiO2 + impurities)

Faceted quartz crystal sphere (likely rock crystal)

Quartz, silicon dioxide (SiO₂)

Blue gemstone ring, likely sapphire

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

Diamond (Cut Gemstone)

Carbon (C)

Blue Sapphire

Corundum (Al2O3)

Opalite

Synthetic Glass / Man-made Opal Simulant

Red synthetic corundum (ruby-colored lab-grown sapphire)

Corundum, aluminum oxide (Al₂O₃), likely synthetic and chromium-colored

Colorless faceted gemstone, likely cubic zirconia

Synthetic cubic zirconia (ZrO₂), tentative; possibly diamond or synthetic moissanite

Emerald

Beryl (Be3Al2(SiO3)6) colored by Chromium and/or Vanadium

Diamond (or Diamond Simulant)

Carbon (C) if diamond, various if simulant (e.g., Cubic Zirconia - ZrO2, Moissanite - SiC)

Green iridescent glass cabochon or synthetic gemstone

Likely synthetic glass; possibly coated synthetic quartz or lab-created green gemstone