Anthropogenic (Man Made Industrial Byproduct)

Libyan Desert Glass

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

Diamond

Native Carbon (C)

Moissanite

Silicon Carbide (SiC)

Clay Brick

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

Sea Glass (Cobalt Blue)

Amorphous Silica (Glass with Cobalt additives)

Diamond (in Jewelry Setting)

Carbon (C)

Pyrite in Matrix

Iron Sulfide (FeS2)

Corundum (Pink Sapphire / Ruby)

Al2O3 (Aluminum Oxide)

Dyed Crackle Quartz

Silicon Dioxide (SiO2) with synthetic dye

Yellow Sapphire (Raw)

Corundum (Al2O3)

Goldstone (aventurine glass)

Man-made copper-bearing glass; not a natural mineral (commonly sold as blue/brown goldstone)

Painted River Pebble (likely Basalt or Greywacke)

Aphanitic Lithic Clast with Anthropogenic Pigment coating

Asphalt (Aggregate)

Bituminous macadam / Concrete Aggregate

Dyed Dragon Vein Agate

Silicon Dioxide (SiO2) with artificial pigment

Diamond

Carbon (C)

Rough Corundum (Sapphire/Ruby mixture)

Corundum (Aluminum Oxide, Al2O3)

Diamond

Carbon (C)

Goldstone (with Tiger's Eye and Quartz)

Aventurine glass (Synthetic SiO2 with Cu inclusions)

Diamond in Kimberlite

Diamond (C in Kimberlite)

Chert (Arrowhead/Artifact Fragment)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Carved Mottled Greenish-Yellow Crystal/Glass Object

Unknown; possibly a form of quartz (chalcedony/jadeite/nephrite) or glass/resin.

Diamond

Carbon (C)

Possible industrial slag or basaltic volcanic glass

Likely iron-rich vitreous slag; natural alternative: basaltic glass (tachylite)

Quartz (Milky/River Quartz)

Silicon Dioxide (SiO2)

Diamond

Carbon (C)

Diamond (Cut Gemstone)

Carbon (C)

Man-made Synthetic Material (Not a rock or mineral)

Polyester (Polyethylene terephthalate) / Faux Fur

Man-made Synthetic Material (Costume Faux Fur)

Synthetic Polymer (Polyester/Acrylic)

Blue glass-like bead or gemstone keychain ornament

Indeterminate; likely cobalt-blue glass or synthetic blue spinel, not identifiable as a natural mineral from the image

Goldstone (likely red/brown aventurine glass)

Man-made aventurine glass; copper-bearing silicate glass (not a natural mineral)

Dyed or synthetic turquoise-blue glass-like specimen

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

Blue goldstone

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

Likely polished quartz or glass-like mineral cabochon

Probably quartz (SiO₂), though the image cannot exclude man-made glass

Diamond (in a jewelry setting)

Carbon (C)

Tiffany Stone

Bertrandite Fluorite (CaF2 + Be4Si2O7(OH)2)

Blue glassy mineral specimen, possibly dyed or synthetic

Uncertain; possible blue fluorite (CaF₂), dyed chalcedony, or man-made glass

Dyed Quartz Geode

Silicon Dioxide (SiO2) with artificial pigment

Diamond

Carbon (C)

Diamond (Colorless/White)

Carbon (C)

White drusy quartz

Quartz, silicon dioxide (SiO₂), with a drusy coating of tiny crystals

Hematite Beads

Hematite (Fe2O3)

Opalite (a synthetic glass, often confused with Opal)

Silicon dioxide glass (SiO2nH2O, for natural opal)