Mineral (Treated)

Dyed Agate

Agate (Cryptocrystalline Quartz), SiO2

Turquoise cabochon jewelry

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

Dragon Vein Agate (Dyed/Fractured Quartz)

Silicon dioxide (SiO2)

Gemstone bead necklace (likely citrine or yellow quartz)

Quartz, SiO₂; precise identification is uncertain because the beads are blurred and metal settings obscure them

Smoky Quartz

Smoky Quartz (SiO ₂)

Citrine (Heat-Treated Amethyst)

Silicon Dioxide (SiO2)

Black Onyx

Silicon Dioxide (SiO2) - Chalcedony variant

Rose Quartz and Cherry Quartz (Dyed Glass/Quartz)

Silicon Dioxide (SiO2) with inclusions/dye

Mystic Topaz

Coated Al2SiO4(F,OH)2

Green cabochon gemstone pendant, likely turquoise or dyed green turquoise

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

White jade bangle with gray accent bead

Likely nephrite jade (microcrystalline tremolite–actinolite); possibly white jadeite, identification requires testing

Black Onyx

Silicon Dioxide (SiO2) with carbon impurities

Amethyst

Quartz (SiO2) with trace iron impurities

Blue-green turquoise-like stone

Turquoise, hydrated copper aluminum phosphate — CuAl₆(PO₄)₄(OH)₈·4H₂O; possibly dyed turquoise or chrysocolla

Turquoise

Turquoise (Hydrated phosphate of copper and aluminium) - CuAl6(PO4)4(OH)8·4H2O

Yellow-orange faceted gemstone, likely citrine or yellow topaz

Citrine: quartz, SiO₂; yellow topaz: Al₂SiO₄(F,OH)₂

Likely obsidian (possibly tektite or slag glass)

Volcanic glass; primarily SiO₂, noncrystalline

Peacock ore (iridescent chalcopyrite, possibly bornite)

Chalcopyrite, CuFeS₂; the iridescent surface may be natural tarnish or artificial acid treatment. Similar material is bornite, Cu₅FeS₄.

Rainbow Hematite (Man-made/Treated)

Tumbled Hematite with Titanium/Anodized coating (Iron(III) oxide, Fe2O3)

Citrine

Silicon Dioxide (SiO2) with iron impurities

Black Onyx

Cryptocrystalline Quartz (SiO2) with carbon/iron impurities

Amethyst

Amethyst (SiO2 - Silicon Dioxide with iron impurities)

Blue Goldstone

Aventurine Glass

African Turquoise (Jasper)

Quartz (SiO2) with impurities (Epidote/Amphibole)

Red Garnet

Pyrope-Almandine series (Mg3Al2(SiO4)3 to Fe3Al2(SiO4)3)

Quartz (likely Yellow/Orange variety, possibly Citrine or Chalcedony with iron staining)

Quartz (SiO₂)

Polished blue chalcedony or glass-like quartz specimen

Chalcedony (microcrystalline SiO₂), possibly treated or synthetic; exact identification requires testing

Chalk

Calcium Carbonate (CaCO3)

Tumbled carnelian (red-orange chalcedony)

Carnelian, a cryptocrystalline variety of quartz: SiO₂

Faceted yellow-brown gemstone earring

Likely citrine (quartz, SiO₂), though treated quartz or synthetic glass cannot be confirmed from the image

Tumbled orange chalcedony (likely carnelian)

Carnelian, a microcrystalline variety of quartz; SiO₂, commonly colored by iron oxides

Yellow Quartz (Citrine Quartzite)

Silicon Dioxide (SiO2)

Quartz (likely Jasper or Chert variety)

Quartz (SiO₂)

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2 with iron oxide)

Beaded Jewelry (Assorted Gemstones)

Various minerals, including but not limited to Quartz (SiO2), Garnet (X3Y2(SiO4)3), Jade (Na(Al,Fe)Si2O6), Amethyst (SiO2),等の多様な組み合わせ

Lapis Lazuli

Lazurite-rich metamorphic rock (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2

Quartzite Jade (Consolidated Quartzite)

Quartzite (SiO2)

Blue Topaz

Aluminum silicate fluoride hydroxide (Al2SiO4(F,OH)2)

Blue Topaz

Aluminum silicate fluoride hydroxide [Al2SiO4(F,OH)2]

Golden Healer Quartz (Iron-Stained Quartz Cluster)

Silicon Dioxide with Iron Oxide inclusions (SiO2 + Fe2O3/FeOOH)

Carnelian (Polished Cabochon)

Silicon Dioxide (SiO2) with iron oxide impurities

Carnelian

Chalcedony (cryptocrystalline quartz), SiO2 (Silicon Dioxide)