Man Made Material (Jewelry, Metal Alloy)

Red cabochon gemstone, likely carnelian or red agate

Cryptocrystalline quartz (chalcedony), SiO₂

Turquoise-bead bracelet (likely dyed howlite or magnesite; material uncertain)

Turquoise is hydrated copper aluminum phosphate, CuAl₆(PO₄)₄(OH)₈·4H₂O; the beads may instead be dyed Ca-Mg carbonate minerals

Pink-red faceted gemstone ring (likely garnet)

Possibly pyrope–almandine garnet, (Mg,Fe)₃Al₂(SiO₄)₃; identification from the image is uncertain

Gemstone-inlaid bracelet, likely lapis lazuli or dyed howlite

Unconfirmed blue cabochons; lapis lazuli is a rock composed mainly of lazurite, while howlite is Ca₂B₅SiO₉(OH)₅

Tumbled fossil shark tooth pendant

Likely fossilized shark tooth, possibly Otodus or Carcharhinus; exact species cannot be confirmed from the image

Faceted gemstone ring, likely smoky quartz or garnet in a metal setting

Not determinable from the photograph; possible quartz (SiO₂) or garnet-group silicate

Asphalt Pavement (with aggregate)

Asphalt concrete

Hematite Beads

Hematite (Fe2O3)

Chert (Jasper/Flint variety)

Silicon Dioxide (SiO2)

Faceted clear gemstone in a gold-colored ring

Unidentified colorless faceted gem; possibly quartz, glass, or another transparent gem material

Star sapphire ring

Corundum (Al₂O₃), likely asteriated sapphire

Weathered concrete or cementitious slab (not natural rock)

Artificial calcium-silicate cement composite; likely Portland cement concrete

Malachite

Malachite, Cu₂CO₃(OH)₂; a banded botryoidal copper carbonate specimen

Faceted citrine pendant

Citrine, gem-quality quartz (SiO₂), likely heat-treated amethyst

Hematite (hematite beads or tiles)

Hematite, α‑Fe₂O₃

Polished blue gemstone bead bracelet, likely aquamarine

Aquamarine, blue variety of beryl (Be₃Al₂Si₆O₁₈); identification from the image is uncertain

Colorless faceted gemstone, likely glass or cubic zirconia

Uncertain; possible cubic zirconia (ZrO₂) or quartz (SiO₂), but the image may show a man-made simulant

Chert (Arrowhead/Artifact Fragment)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Polished yellow jasper cabochon

Jasper, microcrystalline quartz (SiO₂) with iron-oxide and clay inclusions

Ruby in Matrix

Corundum (Al2O3)

Peridot (Olivine)

Magnesium Iron Silicate (Mg, Fe)2SiO4

Red coral (likely precious coral)

Corallium sp.; calcium-carbonate skeleton, primarily calcite

Yellow faceted gemstone earrings, likely citrine or yellow beryl

Citrine: quartz, SiO₂; possible yellow beryl: Be₃Al₂Si₆O₁₈

Amber cabochon ring (likely amber)

Amber — fossilized plant resin; organic mineraloid, not a crystalline mineral

Black stone-bead bracelet, likely black onyx or agate

Probably chalcedony, microcrystalline quartz (SiO₂); the photo alone cannot confirm the bead material

Polished dark chalcedony or agate cabochon

Cryptocrystalline quartz, SiO₂; likely brown-red chalcedony/agate

Lapis lazuli bead bracelet

Lapis lazuli: a rock composed mainly of lazurite, with variable calcite and pyrite

Likely chert (flint)

Microcrystalline quartz (SiO₂), likely chert; exact identification is uncertain from the image alone

Chert

Chert (SiO2)

Turquoise cabochon pendant

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

Metallic iron meteorite (probable)

Iron–nickel alloy, chiefly kamacite and taenite (Fe-Ni)

Iron Meteorite

Meteoritic Iron (Fe-Ni alloy)

Iron Meteorite

Nickel-iron alloy (Kamacite and Taenite)

Polished serpentine pendulum

Serpentine-group minerals, chiefly antigorite/lizardite; approximate formula Mg₃Si₂O₅(OH)₄

Green chalcedony (possibly chrysoprase) cabochon

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

Turquoise-and-coral silver jewelry brooch

Turquoise: hydrated copper aluminum phosphate, CuAl₆(PO₄)₄(OH)₈·4H₂O; red cabochons appear to be coral, likely set in silver

Gemstone-set silver jewelry piece

Likely mixed faceted gemstones in a silver-colored metal setting; stones may include sapphire, ruby/garnet, and yellow sapphire or citrine, but the image is insufficient for species-level identification.

Note on Image Identification: Textile

N/A (Anthropogenic material)

Carnelian ring

Carnelian, a red-orange variety of chalcedony (microcrystalline quartz, SiO₂)

Iron-rich meteorite candidate

Possibly an iron meteorite or stony-iron meteorite; unverified Fe–Ni alloy

Tiny metallic-looking mineral or rock fragment

Unidentifiable from the image; possibly a small metallic mineral grain

Chert (Yellow Jasper/Flint)

Silicon Dioxide (SiO2)