Anthropogenic (Man Made Industrial Byproduct)

Blue chalcedony (likely dyed or treated)

Microcrystalline quartz, SiO₂ (chalcedony)

Raw quartz crystal

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

Metallic sulfide mineral fragment, likely galena

Galena (lead sulfide, PbS), tentative identification

Green sea glass (likely)

Man-made glass, likely soda-lime silicate glass; not a natural mineral or rock

Tumbled milky chalcedony (likely common opalite-like quartz)

Chalcedony, microcrystalline SiO₂; possibly pale common opal, hydrated SiO₂·nH₂O

Colorless quartz crystal (likely quartz fragment)

Quartz, silicon dioxide (SiO₂)

Opalite

Synthetic Opalised Glass

Obsidian (likely black volcanic glass)

Obsidian; primarily amorphous volcanic silica glass, approximately SiO₂-rich rhyolitic composition

Opalite-style pendant (likely synthetic glass, not natural opal)

Opalescent glass; commonly sold as “opalite” (not a recognized mineral species)

Green glassy mineral specimen, likely rough emerald or green fluorite

Tentatively beryl (Be₃Al₂Si₆O₁₈), emerald variety; synthetic/man-made glass cannot be excluded from the photograph

Chert (Jasper/Flint variety)

Microcrystalline Quartz (SiO2)

Iron-rich slag or weathered ironstone fragments

Probably hematite–goethite material; possibly industrial iron slag (Fe₂O₃/FeO(OH))

Likely clear quartz crystal or glass-like gemstone

Quartz, silicon dioxide (SiO₂); exact identification is uncertain from the strongly magenta-lit image

Polished obsidian

Volcanic glass; predominantly rhyolitic SiO₂

Blue Apatite

Apatite (Calcium Phosphate) - Ca5(PO4)3(F,Cl,OH)

Orange glassy slag (industrial by-product)

Iron-rich silicate glass; composition varies, commonly Fe–Ca–Al silicate

Pyrite

Iron Sulfide (FeS2)

Blue Goldstone

Synthetic Avanturine Glass (or Aventurine Glass)

Diamond

Carbon (C)

Asphalt Conglomerate

Artificial Bituminous Conglomerate

Agate and millefiori glass jewelry

Agate: microcrystalline quartz (SiO₂); millefiori element appears to be man-made glass

Green glassy mineral fragment, possibly fluorite

Fluorite (calcium fluoride, CaF₂), tentative identification

Jasper (Multi-colored) / Sea Glass Slag

Silicon Dioxide (SiO2) with impurities of Iron Oxide

Aventurine

Quartz containing inclusions of Fuchsite (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)

Tumbled black stone, likely black obsidian

Obsidian; volcanic glass, typically rhyolitic composition (SiO₂-rich)

Glass Nugget (Tumbled Glass)

Amorphous Silicon Dioxide (SiO2) with additives

Man-made Ceramic / Clay Figurine

Aluminosilicate Ceramic (Processed Clay)

Rainbow Hematite (Man-made/Treated)

Tumbled Hematite with Titanium/Anodized coating (Iron(III) oxide, Fe2O3)

Glass / Silicon Dioxide (Man-made)

SiO2 (Amorphous Silicon Dioxide)

Man-made Glass (Tumbled/Shaped)

Amorphous Silicon Dioxide (SiO2) with metal oxide colorants

Man-made Crystal (Lead Glass)

Lead oxide-doped Silica Glass (approx. SiO2 + PbO)

Man-made Dyed Aura Quartz

Silicon Dioxide (SiO2) with metallic coating/dye

Asphalt Chunk

Asphalt concrete

Bituminous Coal

Coal (Organically derived sedimentary rock)

Dark polished stone, likely basalt or slag-like volcanic rock

Probable fine-grained basalt; exact identification requires testing

Engineered Quartz Stone

Agglomerated Quartz (SiO2 + Polymer Resin)

Tumbled black obsidian (likely)

Volcanic glass; chiefly silica-rich rhyolitic glass (SiO₂)

Blue glassy fragment among beach gravel

Likely cobalt-blue man-made glass; not a natural mineral specimen

Likely weathered iron-rich rock or slag fragment

Indeterminate; possibly limonite/goethite-bearing rock (FeO(OH)·nH₂O) or industrial iron slag

Diamond (in a jewelry setting)

Carbon (C)

Diamond (in jewelry setting)

Diamond (C - Carbon)

Goldstone (brown goldstone)

Man-made aventurine glass, typically copper-bearing silica glass