Sedimentary (Synthetic)

Quartz (Druzy / Goldstone Gemstone Cabochon)

Silicon Dioxide (SiO2)

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

Quartz, silicon dioxide (SiO₂)

Opal gemstone pendant

Opal (hydrated amorphous silica, SiO₂·nH₂O)

Hematite

Iron(III) oxide (Fe2O3)

Limonite (Iron Ore)

Limonite; FeO(OH)·nH2O

Clear quartz crystal sphere

Quartz (silicon dioxide, SiO₂)

Tumbled hematite

Hematite (iron(III) oxide, Fe₂O₃)

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

Red gemstone ring, likely synthetic ruby or red spinel

Ruby: corundum (Al₂O₃); spinel: MgAl₂O₄; exact identity requires testing

Emerald

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

Opal ring

Precious opal, hydrated amorphous silica (SiO₂·nH₂O), set in a metal ring

Hematite bead bracelet

Hematite (Fe₂O₃), likely polished or magnetically enhanced beads

Opalite

Man-made opalescent glass

Red glassy cabochon, likely synthetic ruby or red glass

Uncertain; possible synthetic corundum (Al₂O₃, chromium-colored) or man-made glass

Opalite

Synthetic Opalised Glass

Opalite

Synthetic Opalised Glass

Opalite

Synthetic opalescent glass

Opalite

Synthetic Opalized Glass

Hematite bead bracelet

Hematite (iron(III) oxide, Fe₂O₃), likely polished magnetic hematite or hematite-coated beads

Diamond (or Cubic Zirconia)

Cubic Carbon (C) or Zirconium Dioxide (ZrO2)

Red gemstone, likely ruby

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

Star sapphire ring

Corundum (Al₂O₃), likely asteriated sapphire

Tumbled hematite

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

Dyed Agate

Chalcedony (SiO2)

Ruby (set in a ring; possibly synthetic or imitation)

Corundum, Al₂O₃; red color is typically caused by chromium

Faceted red gemstone, likely ruby

Corundum (Al₂O₃), red variety colored mainly by chromium

Coal (Anthracite/Bituminous)

Carbo fossilium (primarily Carbon)

Sandstone (likely Fossilized Wood or Concrete Simulacrum)

Arenite / Silicified Wood / Anthropogenic Concrete

Painted River Rock

Anthropogenic-modified Siliciclastic Sedimentary Rock

Opalite

Man-made Glass (Synthetic Opalized Glass)

Red gemstone ring (likely synthetic ruby or red glass)

Possibly corundum (Al₂O₃), chromium-colored; identity cannot be confirmed from the image

Emerald

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

Faceted Clear Gemstone (Likely Quartz or Cubic Zirconia)

Silicon Dioxide (SiO2) or Zirconium Dioxide (ZrO2)

Polished hematite bead necklace

Hematite (iron(III) oxide, Fe₂O₃), likely polished beads

Opalite

Synthetic Opalized Glass

Opalite

Synthetic Opalite Glass

Opalite

Synthetic Opalised Glass

Opalite (Synthetic Moonstone/Opal)

Synthetic Silica Glass

Opalite

Synthetic Opalised Glass

Opalite

Synthetic Opalised Glass

Opalite (Man-made Glass)

Synthetic Opalised Glass

Faceted Quartz or Cubic Zirconia

SiO2 (Quartz) or ZrO2 (Cubic Zirconia)