Anthropogenic Sedimentary (Man Made)

Opalite

Synthetic Opalised Glass

Carborundum (Silicon Carbide)

Silicon Carbide (SiC) / Moissanite (natural form)

Obsidian (likely black volcanic glass)

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

Cullet (Slag Glass)

Amorphous Silica (Industrial byproduct)

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

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

Pink Cubic Zirconia (CZ)

Zirconium Dioxide (ZrO2)

Chert (Arrowhead Debitage or Flake)

Microcrystalline silica (SiO2)

Blue Goldstone

Synthetic Avanturine Glass (or Aventurine Glass)

Polished obsidian

Volcanic glass; predominantly rhyolitic SiO₂

Blue Apatite

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

Chert (Arrowhead/Projectile Point)

Cryptocrystalline Quartz (SiO2)

Tumbled black stone, likely black obsidian

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

Aventurine

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

Green glassy mineral fragment, possibly fluorite

Fluorite (calcium fluoride, CaF₂), tentative identification

Asphalt Chunk

Asphalt concrete

Brick

Fired clay or Ceramic material (no specific mineralogical scientific name as it's a composite)

Tumbled black obsidian (likely)

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

Man-made Ceramic / Clay Figurine

Aluminosilicate Ceramic (Processed Clay)

Glass / Silicon Dioxide (Man-made)

SiO2 (Amorphous Silicon Dioxide)

Man-made Blank Ammunition (Brass)

CuZn (Cartridge Brass - roughly 70% Copper, 30% Zinc)

Chert (Arrowhead variety)

Chert (SiO2)

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

Blue sea glass or blue glassy mineral fragment

Uncertain; likely man-made soda-lime glass, not a natural mineral

Blue glassy fragment among beach gravel

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

Opalite

Man-made synthetic glass with opalescent effects (SiO2 + metal oxides)

Slag Glass (Cullet)

Amorphous Silica (man-made), primarily SiO2 with trace metal oxides

Libyan Desert Glass

Impact-melt silica glass (SiO2 + traces of Al, Fe, Ti)

Goldstone (brown goldstone)

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

Green sea glass (likely slag glass or bottle glass)

Man-made soda-lime silicate glass; not a naturally occurring mineral

Green Agate

Silicon dioxide (SiO₂)

Clay Brick

Ceramic structural unit (Al2O3·2SiO2·2H2O as precursor)

Sea Glass (Cobalt Blue)

Amorphous Silica (Glass with Cobalt additives)

Dyed Crackle Quartz

Silicon Dioxide (SiO2) with synthetic dye

Slag

Anthropogenic Iron Silicate Glass

Leland Blue Stone

Anthropogenic Iron Smelting Slag

Slag (Industrial Byproduct)

Anthropogenic Vitreous Silicate material

Possible weathered basalt or slag fragment

Basalt, chiefly plagioclase and pyroxene; identification is uncertain from the image

Dyed Dragon Vein Agate

Silicon Dioxide (SiO2) with artificial pigment

Painted River Pebble (likely Basalt or Greywacke)

Aphanitic Lithic Clast with Anthropogenic Pigment coating

Anthropogenic Heat Source (Electronic/Industrial Interface)

Thermal IR emission (Electronic infrastructure)