Mineral (Man Made Glass)

Diamond

Carbon (C)

Diamond (in a jewelry setting)

Carbon (C)

Fossilized Burrow

Trace fossil (Ichnogenus)

Pearl

Pearl (Calcium Carbonate with organic conchiolin, CaCO3)

Amethyst

Silicon Dioxide (SiO2)

Mixed beach-stone and tumbled-glass collection

Predominantly uncertain rocks (likely basalt, granite, and quartz-bearing stones) with anthropogenic glass; one possible banded agate or jasper

Sandstone

Arenite (SiO2 primarily)

Corundum (Ruby variety)

Aluminium oxide (Al2O3)

Smoky Quartz Cluster

Smoky Quartz (Silicon Dioxide - SiO2)

Fossil Sea Urchin (Echinoid)

Echinoidea fossil (often replaced by silica or calcite)

Polished garnet bead bracelet

Garnet group, likely almandine–pyrope solid solution; commonly approximated as Fe₃Al₂(SiO₄)₃–Mg₃Al₂(SiO₄)₃

Blue glassy cabochon, likely blue quartz or synthetic glass

Possibly dyed blue chalcedony/quartz (SiO₂); visual identification is inconclusive

Obsidian

Volcanic glass

Sandstone

Arenite

Tumbled gray chalcedony (likely agate or quartzite)

Microcrystalline quartz, SiO₂ (chalcedony)

Green Quartzite

Metamorphic Quartzite (often colored by chromium-bearing minerals or fuchsite)

Black tumbled stone, possibly obsidian

Obsidian (natural volcanic glass; composition varies, typically silica-rich)

Sandstone

Arenite

Tumbled carnelian (reddish-orange chalcedony)

Chalcedony, microcrystalline quartz (SiO₂), colored by iron oxides

Banded Chert / Chalcedony

Silicon Dioxide (SiO2)

Blue Chalcedony Cube

Silicon Dioxide (SiO2)

Chalcedony with iron-oxide staining

Microcrystalline quartz (SiO₂), likely chalcedony or chert with limonite/goethite staining

Tumbled yellow jasper or chalcedony

Microcrystalline quartz, SiO₂; likely iron-oxide-bearing jasper/chalcedony

Goldstone

Not a natural mineral or rock. It is an ornamental glass.

Black stone bead bracelet

Likely black tourmaline (schorl), though identification is uncertain from the image

Chert (Flint)

Silicon Dioxide (SiO2)

Polished black obsidian

Volcanic glass; primarily rhyolitic SiO₂, with minor iron, magnesium, and other trace elements

Slag Glass (Cullet)

Amorphous Silica / Glass residue

Weathered iron-rich rock, possibly jasper or ironstone

Likely limonite/goethite-bearing siliceous rock; exact identification requires hardness and streak tests

Chert (Flint/Jasper variety)

Microcrystalline Quartz (SiO2)

Carved smoky quartz (likely)

Quartz, silicon dioxide (SiO₂), smoky variety

Sandstone

Arenite

Obsidian

Volcanic Glass (Amorphous SiO2)

Chert (Flint)

Microcrystalline Quartz (SiO2)

Diamond

Native Carbon (C)

Obsidian

Volcanic Glass (Amorphous Silicon Dioxide)

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Corundum (Sapphire/Ruby in Matrix)

Corundum (Al2O3)

Chert (Jasper variety)

Microcrystalline Quartz (SiO2)

Black tourmaline bead bracelet (likely schorl)

Schorl, NaFe²⁺₃Al₆(BO₃)₃Si₆O₁₈(OH)₄

Obsidian

Volcanic glass (SiO2)

Note on Image Identification: Textile

N/A (Anthropogenic material)