Synthetic (Man Made Glass)

Star sapphire ring

Corundum (Al₂O₃), likely asteriated sapphire

Diamond (or Cubic Zirconia)

Cubic Carbon (C) or Zirconium Dioxide (ZrO2)

Likely rough green-blue glassy mineral fragment

Unidentified; the image is insufficient to distinguish a natural mineral from industrial slag or glass

Gemstone-set silver jewelry piece

Likely mixed faceted gemstones in a silver-colored metal setting; stones may include sapphire, ruby/garnet, and yellow sapphire or citrine, but the image is insufficient for species-level identification.

Diamond (or Clear Quartz / Cubic Zirconia)

Carbon (C) or Silicon Dioxide (SiO2) / Cubic Zirconia (ZrO2)

Green faceted gemstone, likely tsavorite garnet

Tsavorite: green grossular garnet, Ca₃Al₂(SiO₄)₃

Orange glassy slag (industrial by-product)

Iron-rich silicate glass; composition varies, commonly Fe–Ca–Al silicate

Tumbled green beryl or glassy green gemstone

Likely beryl, Be₃Al₂Si₆O₁₈; possibly treated emerald or synthetic glass

Likely green bottle glass, not a geological specimen

Manufactured soda-lime silicate glass

Blue aventurine quartz (likely)

Quartz, silicon dioxide (SiO₂), probably blue aventurine variety

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

Quartz, silicon dioxide (SiO₂)

Cubic Zirconia (CZ)

Zirconium dioxide (ZrO2)

Tumbled Clear Quartz and Citrine Points

Silicon Dioxide (SiO2)

Black Obsidian

Obsidian (Volcanic Glass, SiO2 + impurities)

Blue tumbled glass or dyed stone (uncertain)

Unidentified; appearance is consistent with blue glass, but a blue mineral such as dyed quartz cannot be ruled out from the photo

Blue Sapphire

Corundum (Al2O3)

Chert (flint), likely a weathered nodule fragment

Microcrystalline quartz (SiO₂), commonly termed chert or flint

Tiger’s-eye

Chatoyant quartz (SiO₂), commonly pseudomorphic quartz after crocidolite

Amethyst (Tumbled)

Silicon Dioxide (SiO2) with Fe3+ impurities

Sea Glass

Amorphous silicon dioxide (glass)

Gold-colored gemstone ring, likely citrine or glass imitation

Indeterminate from image; possible quartz (SiO₂) or yellow glass set in gold-colored metal

Green Aventurine

Quartz (SiO2) with Fuchsite inclusions

Silicon Carbide (Carborundum)

Silicon Carbide (SiC)

Polished honey-yellow quartz-like crystal

Quartz (SiO₂), possibly citrine or heat-treated amethyst

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

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

Rough Diamond

Native Carbon (C)

Red garnet cabochon-style earrings

Likely almandine garnet (Fe₃Al₂(SiO₄)₃); the image alone cannot confirm the stone or whether it is natural or synthetic.

Green beryl gemstone (likely emerald or green beryl)

Beryl, Be₃Al₂Si₆O₁₈; green color from chromium/vanadium or iron

Clear faceted gemstone, likely cubic zirconia

Synthetic zirconium dioxide (ZrO₂), probably cubic zirconia; exact identification requires testing

Tumbled quartz (likely milky quartz)

Quartz, silicon dioxide (SiO₂)

Faceted Gemstones (Mixed)

Various (e.g., Corundum, Beryl, Quartz, or synthetic equivalents)

Silicon

Crystalline Silicon (Si)

Diamond (or synthetic simulant)

Cubic C (Carbon)

Red gemstone ring, likely synthetic ruby

Corundum (Al₂O₃), chromium-bearing; possibly lab-created ruby or red glass imitation

Faceted Clear Gemstone (Likely Quartz or Cubic Zirconia)

Silicon Dioxide (SiO2) or Zirconium Dioxide (ZrO2)

Polished blue stone, likely sodalite or dyed agate

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

Smoky Quartz

Silicon Dioxide (SiO2)

Milky quartz

Quartz (silicon dioxide, SiO₂)

Blue Sapphire

Corundum (Al2O3)

Faceted Quartz or Cubic Zirconia

SiO2 (Quartz) or ZrO2 (Cubic Zirconia)

Ruby (set in a ring)

Corundum, Al₂O₃, colored red by chromium; the pictured stone may be synthetic or imitation, which cannot be confirmed from the photo.

Ruby

Corundum (Al2O3 with Chromium trace)