Mineral (Synthetic)

Diamond (or Cubic Zirconia simulant)

C (Carbon) or ZrO2 (Zirconium Dioxide)

Cat's Eye Moonstone (Simulated/Synthetic or natural Cat's Eye Quartz/Glass)

There is no single scientific name. The appearance suggests either: Moonstone (feldspar group), Cat's Eye Quartz (SiO2), Apatite (Ca5(PO4)3(F,Cl,OH)), or most likely a synthetic material such as Fiber Optic Glass or 'Opalite' (a type of glass).

Sapphire

Corundum (Al2O3)

Diamond (or Cubic Zirconia simulant)

Carbon (C) / Zirconium Dioxide (ZrO2)

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

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

Moissanite

Silicon Carbide (SiC)

Likely weathered pebble or mineral fragment

Indeterminate; possibly quartz-rich stone, iron-stained feldspar, or a small chert fragment

Aura Quartz

Silicon Dioxide (SiO2) with Titanium/Metal vapor coating

Silicon Carbide (Carborundum)

Moissanite (SiC)

Dyed Agate Slice

Silicon Dioxide (SiO2) with artificial dyes

Diamond (or Cubic Zirconia)

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

Emerald

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

Blue-violet faceted gemstone, likely amethyst

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

Blue Sapphire

Corundum (Al2O3) with traces of Iron and Titanium

Faceted red gemstone, likely ruby

Corundum (Al₂O₃), red variety colored mainly by chromium

Cherry Quartz with Rose Quartz

Crystalline Quartz (SiO2) with glass-based synthetic components

Red gemstone ring (likely synthetic ruby or red glass)

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

Emerald in Matrix

Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities

Blue Goldstone

Aventurine Glass

Raw ruby (corundum)

Ruby variety of corundum, aluminum oxide (Al₂O₃), colored chiefly by chromium

Amber (Simulated/Faturan Style)

Resin mix (Likely Phenolic/Celluloid if synthetic, Succinite if natural)

Smoky Quartz

Silicon Dioxide (SiO2)

Cubic Zirconia (as a jewelry specimen)

Zirconium dioxide (ZrO2)

Opalite

Synthetic Opalite Glass (Silicon Dioxide)

Strawberry Quartz (Hematoid Quartz)

Silicon Dioxide with Iron Oxide inclusions (SiO2 + Fe2O3)

Diamond (or Cubic Zirconia)

Carbon (C) or Zirconium Dioxide (ZrO2)

Cubic Zirconia (CZ)

Zirconium dioxide (ZrO2)

Cobalt Glass Slug (Man-made Glass)

Amorphous Silica with Cobalt Oxide (SiO2 + CoO)

Carborundum (Silicon Carbide)

Silicon carbide (SiC)

Opalite (Synthetic Moonstone/Opal)

Synthetic Silica Glass

Opalite

Synthetic Opalised Glass

Hematite

Iron(III) oxide (Fe2O3)

Faceted Quartz or Cubic Zirconia

SiO2 (Quartz) or ZrO2 (Cubic Zirconia)

Cubic Zirconia

Zirconium Dioxide (ZrO2)

Blue Sapphire (Synthetic or Man-made Glass Imitation)

Corundum (Al2O3) if natural; Lead-glass or Spinal if synthetic

Hematite bead strand

Hematite, α-Fe₂O₃ (iron(III) oxide)

Clear quartz crystal sphere

Quartz (silicon dioxide, SiO₂)

Opalite

Synthetic Glass (Hydrated Silica Simulant)

Synthetic Ruby (Jewel Bearings)

Synthetic Corundum (Al2O3 doped with Chromium)

Blue Cracked Quartz (Dyed Fire Crackle Quartz)

Silicon Dioxide (SiO2) with synthetic dye

Ruby

Corundum (Al2O3 with Chromium traces)

Faceted Diamond or Cubic Zirconia

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