Sedimentary (Synthetic)

Emerald

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

Polished tiger’s-eye

Quartz variety, SiO₂, with crocidolite-derived iron inclusions

Faceted yellow-green gemstone, likely peridot

Olivine, typically forsterite-rich (Mg₂SiO₄)

Lapis Lazuli

Lapis lazuli (complex rock; primarily Lazurite: (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)

Likely amethyst cabochon ring

Quartz, SiO₂; purple coloration from trace iron and irradiation

Strawberry Quartz (Lepidocrosite/Hematite-Included Quartz)

Quartz (Silicon Dioxide) with Lepidocrosite or Hematite inclusions (SiO2 + Fe2O3 · nH2O)

Lapis Lazuli

Lazurite-rich metamorphic rock (approx. Na6Ca2(Al6Si6O24)(S,SO4,Cl)1,2)

Man-made Green Quartz (Lab-grown or Treated)

Silicon Dioxide (SiO2) with artificial coloration

Strawberry Quartz and Rose Quartz

Silicon Dioxide (SiO2) with inclusions

Diamond (Faceted)

Diamond (Pure Carbon, C)

Purple diamond (rough gem-quality diamond)

Diamond, crystalline carbon (C)

Champagne topaz (likely)

Topaz, Al₂SiO₄(F,OH)₂

Gemstone jewelry ensemble

Likely mixed gemstone and glass-bead jewelry; exact stones cannot be determined from the image

Tumbled turquoise-like stone

Likely turquoise, hydrated copper aluminum phosphate: CuAl₆(PO₄)₄(OH)₈·4H₂O

Blue glassy cabochon, likely blue quartz or synthetic glass

Possibly dyed blue chalcedony/quartz (SiO₂); visual identification is inconclusive

Carborundum (Silicon Carbide)

Silicon Carbide (SiC)

Pearls (likely freshwater cultured pearls)

Pearl: nacre, primarily aragonite (CaCO₃) with conchiolin

Silicon

Element Si

Synthetic Resin (Artificial Specimen)

Polyurethane or Polyester Resin

Peridot gemstone pendant

Olivine, gem-quality forsteritic olivine (approximately (Mg,Fe)₂SiO₄)

Goldstone

Avventurina (Cu + SiO2 glass)

Iridescent polished/tumbled stone (likely coated quartz or glassy synthetic material)

Indeterminate; possibly quartz (SiO₂) with an artificial iridescent coating

Ruby (Faceted)

Corundum (Al2O3 with Cr trace elements)

Diamond

Diamond (C)

Corundum

Corundum (Al2O3)

Blue chalcedony cabochon (probable)

Chalcedony, cryptocrystalline quartz; silicon dioxide (SiO₂)

Star ruby cabochon ring

Corundum, Al₂O₃ (ruby variety), displaying asterism

White seed-bead gemstone strand, likely freshwater pearl or shell pearl

Pearl: nacreous calcium carbonate, chiefly aragonite (CaCO₃) in conchiolin; identification uncertain from image

Diamond-set ring (likely lab-grown or natural diamonds)

Diamond, crystalline carbon (C)

Clear quartz sphere

Quartz (silicon dioxide, SiO₂), likely rock crystal or low-grade milky quartz

Black spinel bead strand

Spinel, magnesium aluminum oxide (MgAl₂O₄)

Blue Dyed Agate

Cryptocrystalline Quartz (SiO2)

Blue glass-like cabochon, likely dyed or synthetic material

Uncertain; possibly dyed chalcedony, synthetic spinel, or blue glass

Citrine

Citrine (Silicon Dioxide, SiO2)

Yellow Sapphire

Corundum (Al2O3:Fe)

Iolite (Cordierite)

Cordierite (Magnesium Aluminum Silicate), Mg2Al4Si5O18

Smoky Quartz

Smoky Quartz (Silicon Dioxide - SiO2)

Blue Sapphire

Corundum (Al2O3 with trace Titanium and Iron)

Smoky Quartz

Silicon Dioxide (SiO2)

Smoky Quartz (with Druzy/Polished Edge)

Smoky Quartz (Silicon Dioxide, SiO2)

Ruby

Corundum (Al2O3 with Chromium trace elements)

Red faceted gemstone ring

Likely synthetic ruby or red spinel; exact identification requires testing