Synthetic (Not A Natural Rock)

Faceted transparent gemstone, likely glass or cubic zirconia

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

Cubic Zirconia

Cubic Zirconium Dioxide (ZrO2)

Pink/red faceted gemstone, likely synthetic ruby or pink sapphire

Corundum, aluminum oxide (Al₂O₃); likely lab-grown or treated material

Ruby (or potential synthetic/imitation)

Corundum (Al2O3)

Possible flint or slag fragment

Microcrystalline quartz (chalcedony), or iron-rich industrial slag

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

Smoky Quartz

Silicon Dioxide (SiO2)

Red gemstone ring, likely synthetic ruby or red glass; exact stone cannot be confirmed from the image

Ruby (corundum, Al₂O₃) if natural; the setting appears to be silver-tone metal

Opalite (likely man-made opalescent glass)

Opalite; not a true mineral, typically synthetic opalescent glass (silica-based)

Opalite

Synthetic Glass (SiO2 + impurities)

Zirconia (Ceramic) & Ion-X Glass

Zirconium Dioxide (ZrO2) and Ion-strengthened Aluminosilicate Glass

Opalite

Man-made Opalized Glass (Synthetic Glass)

Opaline Glass (Opalite)

Synthetic Silicon Dioxide Glass

Ruby

Corundum (Al2O3)

Cubic Zirconia

Zirconium dioxide (ZrO2)

Moissanite

Silicon Carbide (SiC)

Cubic Zirconia and Synthetic Ruby Jewelry

Cubic Zirconia (ZrO2) and Synthetic Corundum (Al2O3)

Opal

Hydrated Amorphous Silica (SiO2·nH2O)

Ametrine

SiO2 (Silicon Dioxide with iron impurities)

Colorless faceted gemstones, likely quartz (rock crystal)

Quartz, silicon dioxide (SiO₂), trigonal crystal system

Aura Quartz

Silicon Dioxide (SiO2) with Titanium/Metal vapor coating

Red cabochon gemstone ring, likely synthetic ruby or red glass

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

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

Quartz, silicon dioxide (SiO₂)

Diamond (in jewelry)

Cubic Carbon (C)

Goldstone (Brown)

Aventurine glass

Opalite

Synthetic Opalised Glass

Smoky Quartz

Silicon Dioxide (SiO2)

Cubic Zirconia

Zirconium Dioxide (ZrO2)

Goldstone

Aventurine Glass (Man-made)

Loose faceted colorless gemstones, likely quartz or glass-like mineral chips

Most consistent with quartz (SiO₂), though the photograph cannot exclude synthetic cubic zirconia or glass

Blue-violet faceted gemstone, likely amethyst

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

Weathered, iron-stained rock (likely metamorphic)

Indeterminate from photograph; possibly quartz-rich gneiss or schist

Ruby

Corundum (Al2O3)

Blue opalite (often sold as synthetic opal)

Opalite glass; amorphous hydrated silica if natural opal (SiO₂·nH₂O)

Diamond (or Cubic Zirconia)

Crystallized Carbon (C) for Diamond; Zirconium Dioxide (ZrO2) for CZ

Opalite

Synthetic Glass, SiO2 base with metallic inclusions

Painted River Rock

Painted Quartzite or Smooth Siltstone

Cubic Zirconia

Zirconium dioxide (ZrO2)

Diamond (or Cubic Zirconia simulant)

C (Carbon) or ZrO2 (Zirconium Dioxide)

Emerald

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

Garnet ring

Likely almandine or pyrope garnet, an Fe–Mg–Al silicate in the garnet group; exact identity cannot be confirmed visually

Diamond (or Diamond Simulant)

C (Carbon) or synthetic equivalent