Synthetic (Ceramic)

Likely diamond accent

Diamond (crystalline carbon, C)

Green Glass (often marketed as 'Obsidian' or 'Green Quartz')

Amorphous Silica (SiO2) with copper or chromium additives

Ruby

Corundum (Al2O3 with Chromium traces)

Blue Sapphire

Corundum (Al2O3)

Corundum (variety Ruby/Sapphire)

Aluminum Oxide (Al2O3)

Rose Quartz

Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese

Smoky Quartz

Silicon Dioxide (SiO2)

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))

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

Limonite/goethite-bearing ironstone (probable)

Goethite, α-FeO(OH), commonly mixed with limonite (hydrated iron oxides) and host rock

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)

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

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)

Goldstone

Avventurina (Cu + SiO2 glass)

Tumbled feldspar-rich rock, possibly moonstone-bearing granite

Plagioclase feldspar (albite–oligoclase), with probable quartz and dark mica/amphibole; exact identification requires testing

Star ruby cabochon ring

Corundum, Al₂O₃ (ruby variety), displaying asterism

Black spinel bead strand

Spinel, magnesium aluminum oxide (MgAl₂O₄)