Man Made

Beaded gemstone bracelet

Indeterminate; likely small polished mineral beads, possibly turquoise or dyed stone, with metal and glass components

Land Snail Shell

Gastropoda (Calcium Carbonate, CaCO3)

Polished blue gemstone bead bracelet, likely aquamarine

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

Possible yellow agate or chalcedony bead

Microcrystalline quartz (SiO₂), likely chalcedony; identification is uncertain from the photo

Polished stone sphere, possibly agate or jasper

Likely microcrystalline quartz (SiO₂); exact variety cannot be confirmed from the image

Rhodonite

Rhodonite, (Mn,Fe,Mg,Ca)SiO₃

Tumbled orange-and-white feldspar-rich stone, likely sunstone or orange feldspar

Likely potassium feldspar (orthoclase or microcline), KAlSi₃O₈; exact identification is uncertain from the image

Polished black stone sphere, likely obsidian

Obsidian — naturally occurring volcanic glass, chiefly silica-rich rhyolitic glass

Quartzite

Metamorphic Quartz Rock (SiO2)

Black Tourmaline

Schorl (NaFe2+3Al6(Si6O18)(BO3)3(OH)4)

Likely sandstone pebble

Quartz-rich sandstone (composition uncertain from the image)

Tumbled quartzite pebble (likely)

Quartz-rich quartzite; mainly SiO₂

Likely flint (dark chert)

Microcrystalline quartz (SiO₂), commonly called chert or flint

Diamond

Carbon (C)

Rutilated Quartz

Silicon Dioxide (SiO2) with Titanium Dioxide (TiO2) inclusions

Granodiorite

Intrusive Igneous Rock

Granite / Diorite (Granodiorite)

Granodiorite / Quartz Diorite

Tumbled brown chalcedony (likely jasper or agate)

Microcrystalline quartz, SiO₂; chalcedony with iron-oxide staining

Slate

Metamorphic Pelitic Rock

Chert (Jasper/Flint variety)

Silicon Dioxide (SiO2)

Diamond

Diamond (pure carbon C)

Diamond

Carbon (C)

Pearl

Calcium Carbonate (CaCO3) - Aragonite/Calcite

Chert or Jasper

Microcrystalline Quartz (SiO2)

Granodiorite / Granite (Weathered)

Granodiorite

Turquoise

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

Tumbled chert or jasper pebble

Microcrystalline quartz (SiO₂), likely chert/jasper

Polished greenstone/serpentine pebble (probable)

Serpentinite, dominated by serpentine-group minerals (lizardite/chrysotile); possible accessory olivine or chlorite

Polished banded jasper (likely red jasper)

Microcrystalline quartz/chalcedony, SiO₂, colored by iron oxides; exact variety uncertain

Likely green bottle glass, not a geological specimen

Manufactured soda-lime silicate glass

Faceted colored gemstones, likely synthetic corundum or glass imitations

Not identifiable from the image; possible synthetic corundum (Al₂O₃)

Red cabochon gemstone ring (likely ruby or red spinel; identity unconfirmed)

Possibly corundum (ruby, Al₂O₃) or spinel (MgAl₂O₄); visual identification alone cannot distinguish these from glass or synthetic stones.

Sandstone (Water-worn Cobble)

Arenite (SiO2 with CaCO3 or Fe2O3 cement)

Carved yellow stone butterfly

Undetermined; possibly carved soapstone (talc-rich rock) or another soft ornamental stone

Dark gray water-worn pebble

Likely basalt or another fine-grained mafic rock; exact identification is not possible from the image alone

Sandstone Pebble

Ferruginous Sandstone (SiO2 with Fe2O3)

Granite

Phaneritic Plutonic Felsic Rock

Granite

Granite (Phaneritic igneous rock)

Granite

Phaneritic Igneous Rock (composed primarily of Quartz, Alkali Feldspar, and Plagioclase)

Red cabochon gemstone ring

The stone may be carnelian (orange-red chalcedony, SiO₂); the image is insufficient to identify it reliably.

Sea Glass

Amorphous silicon dioxide (glass)

Quartzite

Metamorphic Quartz Rock (SiO2)