Mineral (Treated)

Carnelian

Silicon dioxide (SiO2) with Iron Oxide impurities (Fe2O3)

Green Quartz (Prasiolite variant or Aventurine)

Silicon Dioxide (SiO2)

Polished carnelian

Carnelian, orange-red cryptocrystalline quartz (SiO₂), chalcedony variety

Tumbled blue-green chalcedony (likely dyed)

Chalcedony, microcrystalline quartz (SiO₂)

Multicolored gemstone ring, likely set with tourmaline or mixed colored stones

Unidentifiable from the image; possible tourmaline (complex borosilicate) and/or other colored gemstones in a metal setting

Gold-colored gemstone ring, likely citrine or glass imitation

Indeterminate from image; possible quartz (SiO₂) or yellow glass set in gold-colored metal

Black Onyx

Chalcedony (Silicon Dioxide - SiO2)

Amethyst

Amethyst (Silicon Dioxide with iron impurities), SiO2

Rainbow Hematite (Man-made/Treated)

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

Turquoise

Hydrated copper aluminum phosphate (CuAl6(PO4)4(OH)8·4H2O)

Dyed Dragon Vein Agate

Silicon Dioxide (SiO2) with artificial pigment

Black Onyx

Silicon Dioxide (SiO2) with layered chalcedony

Slag Glass (Leland Blue variant)

Anthropogenic Vitreous Silicate

Small rough quartz-family crystal specimens, including likely amethyst and citrine

Quartz, silicon dioxide (SiO₂); purple specimen is likely amethyst, yellow specimen likely citrine or iron-stained quartz

Peacock Ore

Bornite (Cu5FeS4) with surface tarnish

Yellow Quartz (Citrine/Yellow Jasper mix)

Silicon Dioxide (SiO2)

Blue Topaz

Aluminum Silicate Fluoride Hydroxide (Al2SiO4(F,OH)2)

Tumbled citrine quartz

Quartz, silicon dioxide (SiO₂), yellow variety commonly called citrine

Yellow Quartz (Citrine/Yellow Jasper Pebble)

Silicon Dioxide (SiO2)

Aquamarine-like beryl pendant

Beryl, Be₃Al₂Si₆O₁₈; the beads may be dyed or treated chalcedony/amazonite, so image-only identification is uncertain

Peacock Ore (Bornite or Iridescent Chalcopyrite)

Bornite (Cu5FeS4) or Chalcopyrite (CuFeS2) with oxidation

Blue Topaz

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

Red Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2 with Fe2O3 inclusions)

Green Jasper with Quartz veins

Jasper (Silicon Dioxide, SiO2)

Quartz

Quartz (SiO₂ - Silicon Dioxide)

Erythrite (or Lab-Grown Cobaltite/Cinnabar Analog)

Erythrite (Co3(AsO4)2·8H2O)

Blue-green glassy mineral specimen, likely turquoise-colored fluorite or dyed material

Uncertain; possible fluorite (CaF₂), chrysocolla, or dyed calcite/glass

Turquoise cabochon pendant

Turquoise, hydrated copper–aluminum phosphate: CuAl₆(PO₄)₄(OH)₈·4H₂O; likely stabilized or imitation turquoise

Tumbled or rough turquoise-like specimen

Turquoise, hydrated copper aluminum phosphate — CuAl₆(PO₄)₄(OH)₈·4H₂O; possibly dyed/chrysocolla-bearing material

Druzy Quartz on Matrix

Silicon Dioxide (SiO2)

Green chalcedony (possibly chrysoprase) cabochon

Chalcedony, microcrystalline quartz (SiO₂); chrysoprase is nickel-colored chalcedony

Polished citrine quartz (likely heat-treated amethyst)

Quartz, silicon dioxide (SiO₂)

Tumbled turquoise

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

Blue topaz (likely treated)

Topaz, Al₂SiO₄(F,OH)₂

Red Tiger's Eye

Pseudomorph of Quartz after Crocidolite (Silicon Dioxide: SiO2)

Tumbled labradorite beads

Labradorite, a calcium-rich plagioclase feldspar (approximately (Ca,Na)(Al,Si)₄O₈)

Yellow Quartz (Citrine Quartz Pebble)

Silicon Dioxide (SiO2)

Yellow chalcedony (likely agate) cabochons

Microcrystalline quartz, SiO₂; chalcedony variety, possibly naturally colored or dyed

Carnelian Agate

Silicon Dioxide with Iron Oxide impurities (SiO2)

Ruby ring

Corundum (Al₂O₃), red variety colored mainly by chromium

Lavender chalcedony (possibly light amethyst) pendant

Chalcedony: microcrystalline quartz, SiO₂; exact identification requires testing

Faceted yellow gemstone, likely citrine

Citrine (quartz), SiO₂; possibly yellow sapphire or synthetic glass without testing