Sedimentary (Imitation)

Blue quartz (likely dyed or synthetic-treated quartz beads)

Quartz, silicon dioxide (SiO₂)

Green polished gemstone (likely chrysoprase or aventurine)

Chrysoprase: microcrystalline quartz, SiO₂, colored by nickel; possible aventurine quartz: SiO₂ with fuchsite mica

Likely blue glass or synthetic gemstone jewelry

Uncertain; possibly synthetic spinel, cubic zirconia, or blue glass

Blue topaz-style pendant (stone identity uncertain)

Possibly blue topaz (Al₂SiO₄(F,OH)₂); the image cannot confirm whether the stone is natural or synthetic

Turquoise (Blue Howlite imitation)

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

Turquoise-colored howlite (likely dyed), polished cabochon

Howlite, Ca₂B₅SiO₉(OH)₅; the blue color is commonly added dye, though stabilized or imitation turquoise cannot be ruled out visually.

Likely tiger’s-eye cabochon earrings

Tiger’s-eye (fibrous quartz, SiO₂), possibly mixed with brown iron oxides

Clear quartz crystal beads

Quartz (silicon dioxide, SiO₂)

Tumbled orange chalcedony (likely carnelian)

Chalcedony, microcrystalline quartz (SiO₂), commonly colored by iron oxides

Polished carnelian

Carnelian, a translucent variety of chalcedony (microcrystalline quartz, SiO₂), colored mainly by iron oxides

Polished labradorite

Labradorite, calcium-rich plagioclase feldspar (approximately Ca0.5–0.7Na0.5–0.3Al1.5–1.7Si2.5–2.3O8)

Emerald

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

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Diamond (or Cubic Zirconia imitation)

Carbon (C) - Native Element

Pearl necklace (likely cultured pearls)

Pearl; chiefly aragonite (CaCO₃) in an organic conchiolin matrix

Red gemstone ring, likely synthetic ruby

Corundum (Al₂O₃), chromium-bearing; possibly lab-created ruby or red glass imitation

Blue chalcedony (likely dyed or treated)

Microcrystalline quartz, SiO₂ (chalcedony)

Sulfur (with possible Cullet Glass or Slag imitation)

Native Sulfur (S8)

Diamond ring

Diamond (crystalline carbon, C)

Tumbled green serpentine

Serpentine-group minerals, chiefly antigorite and/or lizardite; commonly marketed as “serpentine jade”

Howlite

Howlite, Ca₂B₅SiO₉(OH)₅

Breciated Howlite

Calcium borosilicate hydroxide (Ca2B5SiO9(OH)5)

Turquoise bead bracelet

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

Tumbled smoky quartz (probable)

Quartz, silicon dioxide (SiO₂), smoky variety

Howlite and Tree Agate

Calcium Borosilicate Hydroxide (Howlite) and Silicon Dioxide (Agate/Quartz)

Turquoise-colored bead earrings

Likely dyed or stabilized turquoise; exact stone cannot be confirmed from the photo

Turquoise butterfly carving

Turquoise, CuAl₆(PO₄)₄(OH)₈·4H₂O (carved; possibly stabilized or dyed)

Blue opal heart cabochon

Common opal, hydrated amorphous silica (SiO₂·nH₂O), likely blue-dyed or synthetic opalite

Pearl

Calcium carbonate (principally Aragonite, CaCO3) with Conchiolin

Banded agate (likely carnelian or fire-agate variety)

Microcrystalline quartz, SiO₂ (chalcedony with iron-oxide bands)

Tumbled blue chalcedony (probable)

Chalcedony, microcrystalline quartz (SiO₂), possibly blue quartz or dyed chalcedony

Turquoise (possible Dyed Howlite or Magnesite imitation)

CuAl6(PO4)4(OH)8·4H2O (Turquoise)

Dark green faceted gemstone ring

Likely green tourmaline (dravite/elbaite) or green glass imitation; visual identification is inconclusive

Amber-bearing rough specimen

Fossilized plant resin (amber; organic mineraloid), commonly succinite

Turquoise

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

Polished turquoise cabochon

Turquoise, hydrous copper-aluminum phosphate: CuAl₆(PO₄)₄(OH)₈·4H₂O

Tumbled turquoise-colored stone pendant

Undetermined; possibly dyed howlite or magnesite, or turquoise

Imitation or Cultured Pearl Earrings

Calcium carbonate (CaCO3) or synthetic polymer/glass

Tumbled amber-like brown stone

Uncertain; likely brown jasper or iron-rich chert, possibly amber imitation

Red cut gemstone, likely synthetic ruby

Corundum (Al₂O₃); possibly lab-grown ruby or red glass imitation

Pearl necklace

Pearl: biogenic calcium carbonate, primarily aragonite (CaCO₃), in a conchiolin matrix

Yellow cabochon gemstone, likely citrine or yellow glass imitation

Quartz (SiO₂), if natural citrine; visual evidence is insufficient to exclude man-made glass or resin