Man Made Object (Metalwork)

Lapis lazuli bead bracelet

Lapis lazuli, chiefly lazurite (Na₃Ca(Si₃Al₃)O₁₂S); commonly with calcite and pyrite

Amber cabochon pendant

Amber (fossilized plant resin), chiefly polymerized diterpenoid resin

Tumbled orange chalcedony / jasper

Microcrystalline quartz, SiO₂, likely iron-stained chalcedony or quartz-rich jasper

Tumbled aqua glassy mineral specimen, likely chrysocolla or turquoise imitation

Uncertain from image; possible chrysocolla (hydrated copper aluminosilicate, variable composition) or dyed/man-made glass

Polished agate slice

Microcrystalline quartz (SiO₂), chiefly chalcedony

Possible green glassy mineral pebble

Undetermined; possibly green aventurine (quartz) or another green mineral

Petrified Wood

Silicified Wood (primarily SiO2)

Gem-set gold ring

Likely gold alloy set with a colorless gemstone, possibly diamond or clear quartz; the stone cannot be identified reliably from the image

Unidentified small tan stone

Likely quartz-rich pebble; exact identification is impossible from the image alone

Blue tumbled glass-like specimen; likely blue slag glass

Likely man-made glass (silicate glass), not a natural mineral; exact material cannot be confirmed from the image

Small rounded pebble, likely quartz-rich stone

Unidentifiable from the image; possibly quartzite or quartz-bearing river pebble

Polished orbicular jasper (likely ocean jasper)

Silicified microcrystalline quartz (SiO₂), with iron-oxide and other mineral inclusions; exact variety cannot be confirmed from the image

Diamond (in a gold ring)

Diamond (pure carbon, C)

Polished stone clock face, likely agate or jasper

Unconfirmed silica-rich material; possibly banded chalcedony (SiO₂)

Polished leopard-skin jasper (likely feldspar-rich decorative stone)

Trade name: leopard-skin jasper; appearance may also fit a feldspar-rich rock such as larvikite or gabbro

Tumbled tektite (likely Indonesian or Philippine tektite)

Natural silica-rich impact glass; chiefly SiO₂ with minor Al₂O₃, FeO, MgO, CaO, and Na₂O

Ammonite fossil

Ammonoidea; likely a Jurassic or Cretaceous ammonite

Weathered pegmatite or feldspar-rich granite fragment

Granitic pegmatite, composed mainly of potassium feldspar and quartz, with minor mica; exact identification is uncertain from the photograph

Ambergris

Ambrein-rich Calculus

Small purple crystal, possibly amethyst

Quartz (SiO₂), tentatively amethyst

Possible polished or tumbled stone

Unidentified; the image does not show enough detail to determine its composition

Polished black-and-white banded agate (likely dyed or painted)

Chalcedony (microcrystalline quartz), SiO₂; exact banding variety uncertain

Diamond

Carbon (C)

Sandstone or Quartzite Pebble

Arenite or Quartzite

Raw quartz crystal pendant

Quartz (silicon dioxide, SiO₂), likely milky or cloudy quartz

Faceted glass-like gemstone (likely synthetic quartz or cubic zirconia)

Identification uncertain; possibilities include synthetic quartz (SiO₂) or cubic zirconia (ZrO₂)

Black tourmaline bead bracelet (likely schorl)

Schorl, NaFe²⁺₃Al₆(BO₃)₃Si₆O₁₈(OH)₄

Dark mafic rock, possibly basalt

Likely basalt; precise identification is uncertain from the image

Luminous Stone (Glow-in-the-dark Synthetic/Man-made Stone)

Strontium Aluminate tinted glass or resin (Crystalline silicate/oxide mix)

Gemstone ring (stone not identifiable)

Unknown; the small central stone may be a colorless gemstone or glass, and the surrounding metal is gold-colored alloy

Tumbled lavender quartz (likely lepidolite-bearing quartz or dyed quartz)

Quartz, SiO₂; possible lepidolite mica inclusions

Banded agate cabochon

Microcrystalline quartz (chalcedony), SiO₂

Black onyx or black agate bead bracelet

Microcrystalline quartz, chiefly chalcedony (SiO₂); commonly sold as black onyx, sometimes dyed black agate

Possible petrified wood or fossilized tooth

Unidentified silicified fossil; exact identification requires close examination

Mixed gemstone bead bracelet

Likely rose quartz, amethyst, and possibly rhodonite or lepidolite beads

Calcite (or Alabaster, if truly carved)

Calcium Carbonate (CaCO3)

Chert (Jasper/Agate variety)

Silicon Dioxide (SiO2)

Possibly turquoise or chrysocolla

Indeterminate copper-bearing mineral; turquoise is CuAl₆(PO₄)₄(OH)₈·4H₂O, while chrysocolla is a variable hydrated copper silicate

Diamond (in a jewelry setting)

Diamond (Carbon, C)

Polished serpentine pendulum

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

Serpentinite (likely serpentinized ultramafic rock)

Serpentinite; chiefly serpentine-group minerals (Mg₃Si₂O₅(OH)₄), commonly with magnetite, chromite, and relict olivine/pyroxene

Engraved green stone worry pebble

Likely nephrite jade (tremolite–actinolite series); identification is uncertain from the image