Mineral Simulant (Synthetic Glass)

Strawberry Quartz (Hematoid Quartz)

Silicon Dioxide with Iron Oxide inclusions (SiO2 + Fe2O3)

Ruby / Red Tourmaline

Corundum (Al2O3) or Elbaite (Na(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)4)

Diamond (or Diamond Simulant)

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

Corundum (Pink Sapphire / Ruby)

Al2O3 (Aluminum Oxide)

Costume Jewelry Gemstones (Emerald-imitation and semi-precious beads)

BeCuAl6Si6O18 (Beryl structure), frequently simulated by glass or synthetic spinel

Diamond (or Cubic Zirconia simulant)

Carbon (C) or 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

Zirconia (Ceramic) & Ion-X Glass

Zirconium Dioxide (ZrO2) and Ion-strengthened Aluminosilicate Glass

Likely blue glass or synthetic gemstone jewelry

Uncertain; possibly synthetic spinel, cubic zirconia, or blue glass

Ruby (in costume jewelry context)

Corundum (Al2O3) with Chromium impurities

Garden Quartz (Lodalite)

Silicon Dioxide with various mineral inclusions (SiO2)

Carborundum (Silicon Carbide)

Silicon Carbide (SiC) / Moissanite (natural form)

Blue Goldstone

Man-made glass with cobalt and metal flecks

Diamond

Carbon (C)

Opalite

Synthetic Glass (Simulated Opal)

Diamond (or Simulant)

Carbon (C) or Cubic Zirconia (ZrO2)

Opalite

Synthetically produced glass (Silicon Dioxide with metallic inclusions)

Opalite

Man-made opalized glass

Smoky Quartz

Silicon Dioxide (SiO2)

Diamond (Rough)

Diamond (Carbon, C)

Diamond (or Simulant)

Carbon (C) or Cubic Zirconia (ZrO2)

Tumbled amethyst

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

Smoky Quartz

Smoky Quartz (Silicon Dioxide, SiO2)

Synthetic Sapphire and Ion-X Glass

Single-crystal Alumina (Al2O3) and Ion-strengthened Aluminosilicate Glass

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Spinel

Magnesium Aluminum Oxide (MgAl2O4)

Strawberry Quartz and Rose Quartz

Silicon Dioxide (SiO2) with inclusions

Serpentine (Serpentinite)

Serpentinite (complex silicate group including lizardite, chrysotile, and antigorite)

Blue opalite (often sold as synthetic opal)

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

Ruby (Raw Corundum)

Al2O3 (Aluminum Oxide)

Red gemstone ring, likely garnet or synthetic ruby

Possibly almandine garnet (Fe₃Al₂(SiO₄)₃) or corundum/ruby (Al₂O₃); image alone cannot distinguish

Diamond (or Diamond Simulant)

Carbon (C)

Faceted Diamond or Cubic Zirconia

Carbon (C) for Diamond; Zirconium dioxide (ZrO2) for CZ

Blue Howlite (Dyed)

Calcium Borosilicate Hydroxide (Ca2B5SiO9(OH)5)

Opalite

Synthetic Glass (Simulated Opal)

Opalite

Opalescent Glass (SiO2 + coloring agents)

Diamond (or Diamond Simulant)

Carbon (C) - Native Element

Serpentinite

Serpentine group minerals (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4

Cubic Zirconia

Cubic Zirconia (Zirconium Dioxide, ZrO2)

Opalite

Synthetic glass (SiO2 + metal additions)

Luminous Stone (Glow-in-the-dark Synthetic/Man-made Stone)

Strontium Aluminate tinted glass or resin (Crystalline silicate/oxide mix)

Artisanal Glass Beads (Simulated Goldstone or Aventurine Glass)

Silicon Dioxide (SiO2) with metallic inclusions