Not A Rock (Synthetic Material)

Pink corundum (likely synthetic or treated sapphire)

Corundum, Al₂O₃; pink coloration commonly from chromium or treatment

Faceted red gemstone, likely ruby

Corundum (Al₂O₃), colored red by chromium; identification from the image is uncertain

Opal cabochon or opal-like decorative specimen

Hydrated amorphous silica, SiO₂·nH₂O; likely synthetic or assembled opal material

Emerald

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

Yellow faceted gemstone, likely citrine or synthetic glass

Citrine (quartz, SiO₂) is the leading natural possibility; visual identification is uncertain from the photograph

Red glass-like crystal, likely synthetic ruby or red glass

Uncertain from image; possible corundum (ruby), Al₂O₃, or synthetic glass

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

Clear Quartz (Faceted) or Cubic Zirconia / Glass imitation

SiO2 (if Quartz), ZrO2 (if Cubic Zirconia)

Likely bismuth crystal

Synthetic bismuth (Bi), crystallized from molten metal; not a natural rock-forming specimen

Red gemstone, likely ruby

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

Likely clear quartz crystal (possibly cut/polished quartz or glass imitation)

Quartz, silicon dioxide (SiO₂)

Blue glassy mineral fragment, possibly sodalite or dyed/cobalt glass

Uncertain; likely sodalite (Na₈Al₆Si₆O₂₄Cl₂) if natural, but vivid blue color may indicate cobalt-colored glass

Faceted citrine-colored gemstone (likely synthetic/display stone)

Quartz, SiO₂, if natural citrine; possibly synthetic sapphire or glass imitation

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

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

Tumbled amethyst

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

Tumbled amethyst

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

Pink-purple faceted gemstone ring (likely garnet)

Likely almandine–pyrope garnet, (Fe,Mg)₃Al₂(SiO₄)₃; identification from the image is uncertain.

Opalite

Man-made glass (traditionally simulated Opal)

Cubic Zirconia (Set in Jewelry)

Zirconium Dioxide (ZrO2)

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

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

Blue slag glass / industrial glass fragment

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

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

Alexandrite: chrysoberyl, BeAl₂O₄; exact identification requires gemological testing

Weathered granite boulder

Granite, a coarse-grained felsic intrusive igneous rock, typically composed of quartz, feldspar, and mica

Tumbled granite pebble

Granite, a quartz–feldspar plutonic rock

Amethyst gemstone ring

Quartz, purple variety — SiO₂

Blue gemstone ring, likely blue topaz or synthetic blue spinel

Likely topaz (Al₂SiO₄(F,OH)₂) or synthetic spinel (MgAl₂O₄); identification is uncertain from the image

Clear faceted gemstone, likely quartz (rock crystal)

Quartz, silicon dioxide (SiO₂); exact identity cannot be confirmed from the glare-heavy image

Faceted clear gemstone, likely quartz (rock crystal)

Quartz, silicon dioxide (SiO₂); exact identity is uncertain because the strong flash and cut obscure diagnostic features

Ruby (rough or poorly polished corundum)

Corundum, Al₂O₃; red gem-quality corundum is ruby

Green faceted gemstone earrings, likely synthetic emerald-colored glass or cubic zirconia

Undetermined; possible glass (amorphous silicate) or synthetic cubic zirconia (ZrO₂)

Rose Quartz and Cherry Quartz (Dyed Glass/Quartz)

Silicon Dioxide (SiO2) with inclusions/dye

Diamond (or Cubic Zirconia)

Carbon (C) or Zirconium Dioxide (ZrO2)

Diamond-set gold ring

Diamond (crystalline carbon, C) set in a gold alloy; the metal and setting are manufactured

White cabochon gemstone, likely agate or chalcedony

Cryptocrystalline quartz (SiO₂), probably chalcedony/agate; exact identification is uncertain from the overexposed image

Carved labradorite fish

Labradorite, calcium-rich plagioclase feldspar (approximately (Ca,Na)(Al,Si)₄O₈)

Decorative gemstone bracelet or jewelry

Unidentifiable from the blurred image; likely colored glass or synthetic stones, possibly mixed gemstone beads

Ruby (faceted gemstone in a ring)

Corundum, Al₂O₃; red color typically from trace chromium

Red corundum (ruby-colored polished crystal)

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

Polished blue stone, likely sodalite or dyed agate

Most consistent with sodalite (Na₈(Al₆Si₆O₂₄)Cl₂), though the image cannot confirm composition

Tumbled hematite

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

Painted River Rock

Anthropogenic-modified Siliciclastic Sedimentary Rock

Green gemstone ring, likely emerald simulant or jade

Uncertain; possible beryl (emerald, Be₃Al₂Si₆O₁₈) or jadeite (NaAlSi₂O₆), but the blurred image may show synthetic glass or another treated stone