Mineraloid (Synthetic)

Raw ruby (likely corundum)

Corundum, Al₂O₃; red color caused mainly by chromium

Rose Quartz

Silicon Dioxide (SiO2)

Anthracite Coal

Anthracite (Carbon ≥ 86%)

Turquoise ring

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

Amethyst ring

Amethyst, purple quartz (SiO₂)

Tanzanite earrings

Tanzanite, blue-violet zoisite (Ca₂Al₃(SiO₄)₃(OH))

Limonite (Iron Ore)

Limonite (an FeO(OH)·nH2O mineraloid, not a true mineral due to variable composition)

Blue aventurine quartz (likely)

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

Pink quartz (likely rose quartz)

Quartz, silicon dioxide (SiO₂), likely rose quartz; possibly lab-created or treated

Amethyst cabochon

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

Emerald

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

Blue Goldstone

Aventurine Glass (SiO2 with Co and metallic inclusions)

Likely amethyst cabochon ring

Quartz, SiO₂; purple coloration from trace iron and irradiation

Hematite bead bracelet

Hematite (iron(III) oxide, Fe₂O₃), likely polished specular hematite

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

Yellow faceted gemstone, likely citrine or synthetic glass

Citrine (quartz, SiO₂) is the leading natural possibility; visual identification is uncertain from the photograph

Green cabochon gemstone pendant, likely turquoise or dyed green turquoise

Probably turquoise, CuAl₆(PO₄)₄(OH)₈·4H₂O; exact identification requires testing

Diamond (Faceted)

Diamond (Pure Carbon, C)

Man-made Polished Porcelain Tile (Artificial Geologic Lookalike)

Fused Silicate Ceramic with Alumina (Synthetic Kaolinite derivative)

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

Amber

Succinite (specifically for Baltic amber); C10H16O (Variable organic compound)

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)

Carborundum (Silicon Carbide)

Silicon Carbide (SiC)

Silicon

Element Si

Pearls (likely freshwater cultured pearls)

Pearl: nacre, primarily aragonite (CaCO₃) with conchiolin

Peridot gemstone pendant

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

Hematite

Iron(III) oxide (Fe2O3)

Goldstone

Avventurina (Cu + SiO2 glass)

Star ruby cabochon ring

Corundum, Al₂O₃ (ruby variety), displaying asterism

Black spinel bead strand

Spinel, magnesium aluminum oxide (MgAl₂O₄)

Blue Dyed Agate

Cryptocrystalline Quartz (SiO2)

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)

Opal

Hydrated amorphous form of silica (SiO2·nH2O)