Mineral Simulant (Synthetic Glass)

Goldstone

Avventurina (Man-made Glass with Copper inclusions)

Quartz (Druzy / Goldstone Gemstone Cabochon)

Silicon Dioxide (SiO2)

Opalite

Synthetic Glass (Hydrated Crystalline Silicon Dioxide simulation)

Fluorite

Calcium Fluoride (CaF2)

Carved labradorite fish

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

Howlite

Howlite (Calcium borosilicate hydroxide, Ca2B5SiO9(OH)5)

Red/pink faceted gemstone, likely synthetic ruby or red glass

Corundum (Al₂O₃) if ruby; identity cannot be confirmed visually

Opalite-style pendant (likely synthetic glass, not natural opal)

Opalescent glass; commonly sold as “opalite” (not a recognized mineral species)

Amethyst (Tumbled)

Silicon Dioxide (SiO2) with Fe3+ impurities

Tiger’s-eye

Chatoyant quartz (SiO₂), commonly pseudomorphic quartz after crocidolite

Silicon

Crystalline Silicon (Si)

Diamond

Diamond (pure carbon; C)

Quartz (Smoky Quartz variant)

Silicon Dioxide (SiO2)

Opalite

Man-made Opalized Glass (Synthetic Glass)

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

Decorative opal-like turtle mosaic

Likely imitation or assembled opal material; exact stones cannot be confirmed visually

Diamond (or Cubic Zirconia simulant)

C (Carbon) or ZrO2 (Zirconium Dioxide)

Cubic Zirconia (Diamond Simulant)

Zirconium Dioxide (ZrO2)

Smoky Quartz

Silicon Dioxide (SiO2)

Opalite

Man-made Synthetic Glass (Silicon Dioxide with metal additives)

Blue Sapphire

Corundum (Al2O3)

Smoky Quartz

Silicon Dioxide (SiO2)

Red faceted gemstone, likely synthetic ruby or red glass

Ruby: corundum, aluminum oxide (Al₂O₃), chromium-colored; identity cannot be confirmed visually

Amethyst (faceted gemstone)

Quartz, silicon dioxide (SiO₂), purple variety colored mainly by iron-related defects

Ruby

Corundum (Al2O3 with Chromium trace)

Faceted clear gemstone (likely glass imitation or quartz)

Uncertain; appearance is consistent with colorless quartz (SiO₂), but the strong uniform brilliance may indicate cut glass or cubic zirconia

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Blue Quartz / Glass Gemstone Pendant

SiO2 (Silicon Dioxide) or Synthetic Glass

Green Fluorite (likely synthetic or heat-treated for jewelry)

Calcium Fluoride (CaF2)

Diamond (Set in jewelry)

Cubic Carbon (C)

Smoky Quartz

Silicon Dioxide (SiO2)

Turquoise cabochon or turquoise-bearing material

Turquoise, hydrated copper aluminum phosphate — CuAl₆(PO₄)₄(OH)₈·4H₂O

Polished tiger’s eye

Quartz (microcrystalline SiO₂) with crocidolite-derived iron oxides

Polished blue stone, likely sodalite or dyed agate

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

Blue Sapphire

Corundum (Al2O3 with trace Titanium and Iron)

Strawberry Quartz

Silicon Dioxide with Hematite inclusions (SiO2 + Fe2O3)

Red gemstone ring, possibly synthetic ruby or red glass

Unidentified red stone; ruby is corundum (Al₂O₃), but the image cannot confirm its identity

Blue stone cabochon, likely lapis lazuli or dyed stone

Lapis lazuli: lazurite-rich rock, chiefly (Na,Ca)₈(AlSiO₄)₆(S,SO)₂; exact identification is uncertain from the image

Amethyst jewelry centerpiece

Amethyst, purple quartz (SiO₂), likely set with colorless diamonds or other gems

Ruby (varieties of Corundum)

Aluminum oxide (Al2O3) with Chromium traces

Blue faceted gemstone, likely sapphire

Corundum (Al₂O₃), likely blue sapphire; identity cannot be confirmed from the photograph alone

Diamond (or Cubic Zirconia simulant)

Carbon (C) or Zirconium Dioxide (ZrO2)