Mineral (Man Made Glass, Not Natural)

Sea Glass

Man-made silicate glass

Dyed or synthetic turquoise-blue glass-like specimen

Likely man-made colored glass or resin; exact identification requires testing

Sea Glass

Man-made silicate glass

ABS Plastic (Acrylonitrile Butadiene Styrene)

(C8H8)x·(C4H6)y·(C3H3N)z

Green sea glass (likely slag glass or bottle glass)

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

Man-made Glass (Tumbled/Shaped)

Amorphous Silicon Dioxide (SiO2) with metal oxide colorants

Concrete Paver (Artificial Cementitious Rock)

Hydrated Portland Cement Aggregate

Sea Glass

Silicon dioxide (mostly)

Goldstone (Red)

Aventurine Glass (SiO2 + Cu)

Unidentifiable Rock Fragment

Blue cabochon, likely dyed or synthetic material

Undetermined; possibly dyed chalcedony (SiO₂), glass, or synthetic corundum

Titanium Aura Quartz

Silicon Dioxide (SiO2) coated with Titanium and Niobium

Aqua Aura Quartz

Titanium/Gold-coated Silicon Dioxide (SiO2)

Crackle Agate / Dyed Quartz

SiO2 (Silicon Dioxide)

Blue obsidian-like volcanic glass

Volcanic glass, chiefly silica-rich amorphous material (composition uncertain)

Blue-dyed tumbled quartz or glass imitation

Quartz (SiO₂), appearance possibly enhanced with blue dye; identity uncertain from image

Blue Sapphire (Synthetic or Man-made Glass Imitation)

Corundum (Al2O3) if natural; Lead-glass or Spinal if synthetic

Slag Glass

Anthropogenic Amorphous Silicon Dioxide

Dyed Imperial Jasper (Sea Sediment Jasper)

Silicon Dioxide (SiO2) - Impure Quartz/Chalcedony

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

Engineerged Quartz (Quartz Composite)

SiO2 (Silicon Dioxide) in a polymer resin matrix

Cullet Glass (Slag Glass)

Amorphous Silicon Dioxide (Industrial byproduct)

Polished black pebble, possibly obsidian

Volcanic glass (obsidian), likely; identification is tentative from the image

Concrete

Anthropogenic Conglomerate

Libyan Desert Glass

Libyan Desert Glass (SiO2 with trace elements)

Goldstone (Brown/Gold)

Aventurine Glass (Man-made glass with Copper inclusions)

Iron-rich slag or ironstone; appearance is not diagnostic

Likely iron-oxide-rich material (hematite, Fe₂O₃, and/or magnetite, Fe₃O₄); possibly smelting slag

Titanium Aura Quartz

Titanium-coated Silicon Dioxide (SiO2)

Blue goldstone

Man-made aventurine glass containing metallic copper particles; not a natural mineral

Blue glassy tumbled stone, likely blue chalcedony or slag glass

Chalcedony (microcrystalline SiO₂), possibly man-made blue glass

Obsidian (Blue)

Volcanic Glass (SiO2)

Cherry Quartz

SiO2 (Silicon Dioxide with iron-rich inclusions/dye)

Polished black pebble, likely basalt

Basalt, a fine-grained mafic volcanic rock composed mainly of plagioclase feldspar and pyroxene, commonly with olivine

Opalite

Synthetic Glass (Hydrated Crystalline Silicon Dioxide simulation)

Strawberry Quartz

Silicon Dioxide (SiO2) with Hematite/Goethite inclusions

Green obsidian (likely molded or heat-treated glass-like specimen)

Volcanic glass; predominantly rhyolitic composition (silica-rich amorphous SiO₂)

Diamond

Native Carbon (C)

Crackled Quartz (Dyed)

Silicon Dioxide (SiO2)

Asphalt Concrete

Bituminous Concrete

Opalite

Synthetic Opalised Glass

Likely blue-green glassy slag or a weathered mineral fragment

Unidentified; the image does not show diagnostic features sufficient for a mineral identification