Man Made Object (Coin)

Mixed gemstone bead bracelet

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

Yellow calcite (likely)

Calcite, CaCO₃

Chert (Jasper/Agate variety)

Silicon Dioxide (SiO2)

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

Sandstone or Quartzite Pebble

Arenite or Quartzite

Undetermined Due to Blur (Possible Flesh-Tone Mineral)

Unknown (Insufficient Visual Clarity)

Orange Calcite

Calcium Carbonate (CaCO3)

Tanzanite

Blue Zoisite (Ca2Al3(SiO4)(Si2O7)O(OH))

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

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

Polished serpentine pendulum

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

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

Quartz, SiO₂; possible lepidolite mica inclusions

Fossilized ammonite

Ammonoidea (likely an ammonite; exact genus indeterminate)

Orange Calcite (Polished Point)

Calcium carbonate (CaCO3)

Limestone with Fossil Fish Fragment

Calcite (CaCO3) containing a fossil teleost

Diamond (in a jewelry setting)

Diamond (Carbon, C)

Carved serpentine pendant

Serpentine-group minerals, commonly antigorite/lizardite (Mg₃Si₂O₅(OH)₄), possibly mixed with chlorite or other inclusions

Engraved green stone worry pebble

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

Serpentinite (likely serpentinized ultramafic rock)

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

Copper Bullion Round

Native Copper (refined), Cu

Tumbled dark blue-green stone, likely labradorite or indigo gabbro

Indeterminate; possible feldspar-rich labradorite (plagioclase, NaAlSi₃O₈–CaAl₂Si₂O₈)

Small rounded pebble

Unidentified lithic clast; likely fine-grained sandstone, mudstone, or basalt

Blue Calcite

Calcium Carbonate (CaCO3)

Pearls (likely freshwater cultured pearls)

Pearl: nacre, primarily aragonite (CaCO₃) with conchiolin

Tiger’s-eye (likely a polished or carved tiger’s-eye piece)

Quartz variety with fibrous crocidolite-replacement structure; SiO₂

Tumbled yellow calcite

Calcite, CaCO₃

Possible yellow calcite fragment

Calcite (CaCO₃), identification uncertain from the image

Blue calcite (rough fragment)

Calcite, CaCO₃

Likely ironstone concretion or weathered iron-rich rock

Goethite/hematite-bearing limonite (FeO(OH)·nH₂O / Fe₂O₃)

Calcite

Calcium Carbonate (CaCO3)

Likely weathered sandstone or iron-stained sedimentary pebble

Indeterminate clastic sedimentary rock; possibly quartz-rich sandstone

Small stud earring with a purple gemstone (possibly amethyst)

Possible amethyst, a purple variety of quartz (SiO₂); identification is uncertain from the image

Pink quartz crystal, possibly rose quartz

Quartz (silicon dioxide, SiO₂), likely pink quartz/rose quartz

Limestone

CaCO3 (Limestone)

Orange Calcite (Banded Calcite)

Calcite (Calcium Carbonate, CaCO3)

Limestone Fragment

Sedimentary rock (primarily Calcium Carbonate, CaCO3)

Yellow Calcite

Calcite (Calcium Carbonate, CaCO3)

Gemstone bead necklace (likely citrine or yellow quartz)

Quartz, SiO₂; precise identification is uncertain because the beads are blurred and metal settings obscure them

Honey calcite

Calcite (calcium carbonate, CaCO₃)

Likely dark rounded stone or mineral fragment

Indeterminate; possibly a water-worn mafic rock such as basalt

Unable to Identify (Image Obscured)

Clear quartz crystal pendant

Quartz (silicon dioxide, SiO₂)