Sedimentary (Imitation)

Clear Quartz (Tumbled)

Silicon Dioxide (SiO2)

Blue-and-white polished stone, likely dyed howlite or turquoise imitation

Probably dyed magnesite/howlite (CaCO₃), but the image is insufficient for confirmation

Turquoise cabochon

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

Polished amber fragment

Amber (fossilized plant resin), chiefly polymerized diterpenoid resin

Amber (rough amber piece)

Fossilized plant resin; predominantly polymerized terpenoid resin (succinite, when Baltic-type)

Lapis lazuli bead bracelet

Lazurite-bearing calcite–pyrite rock; lazurite formula (Na,Ca)₈(AlSiO₄)₆(S,SO)₂

Likely polished garnet fragment

Garnet group, possibly almandine (Fe₃Al₂Si₃O₁₂)

Ruby ring (likely synthetic ruby)

Corundum, Al₂O₃; red color from chromium. The image alone cannot establish whether the stone is natural or lab-grown.

Tumbled green aventurine (likely)

Quartz, SiO₂, with fuchsite or other green inclusions

Tumbled amber

Amber (fossilized plant resin; predominantly polymerized succinite)

Red-and-brown agate bead bracelet

Agate, a microcrystalline variety of quartz (SiO₂), likely colored chalcedony/carnelian

Yellow agate or yellow chalcedony bead strand

Microcrystalline quartz (SiO₂), chalcedony; possibly iron-stained agate or heat-treated quartz

Tumbled tiger’s-eye

Tiger’s-eye quartz, SiO₂ with fibrous crocidolite pseudomorphs

Tumbled turquoise

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

Pearl (Biogenic Mineraloid)

Calcium carbonate (Aragonite) and Conchiolin, CaCO3

Chrysocolla in Malachite

Cu2CO3(OH)2 (Malachite) / Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O (Chrysocolla)

Tumbled amber-like gemstone

Likely amber (fossilized resin; organic mineraloid), possibly citrine or yellow-brown glass imitation

Polished turquoise cabochon

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

Tumbled green aventurine (probable)

Quartzite dominated by quartz (SiO₂), with green fuchsite mica inclusions

Polished green nephrite jade

Nephrite jade; interlocking tremolite–actinolite amphibole, Ca₂(Mg,Fe)₅Si₈O₂₂(OH)₂

Shell Cameo (Sardonyx Shell)

Cassis madagascariensis (Sardonyx shell)

Black Pearl (Tahitian Pearl)

Aragonite / Calcite (CaCO3) with Conchiolin

Black Onyx

Black Chalcedony (SiO2)

Likely polished leopard-skin jasper or brecciated jasper

Jasper, an opaque microcrystalline variety of quartz (SiO₂), with iron-oxide and other mineral inclusions; exact variety cannot be confirmed from the image alone

Turquoise ring (likely stabilized or imitation turquoise)

Turquoise, CuAl₆(PO₄)₄(OH)₈·4H₂O; exact material is uncertain from the image

Polished tiger’s-eye cabochon

Quartz variety, primarily fibrous chalcedony with crocidolite pseudomorphs; SiO₂

Tumbled carnelian (likely dyed chalcedony)

Microcrystalline quartz, SiO₂; chalcedony variety, orange-red coloration from iron oxides

Tumbled orange-and-white chalcedony (likely carnelian or orange agate)

Microcrystalline quartz, SiO₂; chalcedony variety, possibly iron-colored carnelian

Green aventurine (likely)

Quartzite dominated by quartz (SiO₂), commonly containing fuchsite mica

Brown agate or chalcedony cabochon pendant

Microcrystalline quartz (SiO₂), likely brown chalcedony/agate

Carnelian (red-orange chalcedony) beads

Microcrystalline quartz, SiO₂; chalcedony colored chiefly by iron oxides

Amethyst (rough crystal fragment)

Quartz, SiO₂; purple coloration from iron impurities and irradiation

Amethyst jewelry centerpiece

Amethyst, purple quartz (SiO₂), likely set with colorless diamonds or other gems

Turquoise cabochon

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

Polished tiger’s-eye

Chatoyant quartz, mainly fibrous crocidolite pseudomorphed by quartz (SiO₂)

Polished amber-like specimen

Amber (fossilized resin), likely succinite; possible amber-colored copal or resin imitation

Faceted transparent gemstone, likely glass or cubic zirconia

Uncertain from image; possible cubic zirconia (zirconium dioxide, ZrO₂) or glass imitation

Blue-dyed howlite beads (likely)

Howlite, Ca₂B₅SiO₉(OH)₅, commonly dyed blue to imitate turquoise

Blue chalcedony bead necklace

Chalcedony, microcrystalline quartz (SiO₂), commonly blue-dyed or blue-gray natural chalcedony

Green aventurine bead bracelet

Quartz (SiO₂), likely fuchsite-bearing aventurine

Polished turquoise

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

Lapis Lazuli

Complex mixture containing Lazurite ((Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2), Calcite, and Pyrite