Man Made Alloy (Metallic)

Likely raw galena-bearing ore

Galena (PbS), possibly associated with dark sphalerite or matrix minerals

Galena (likely)

Galena, lead sulfide (PbS)

Rutilated Quartz

Silicon Dioxide (SiO2) with Titanium Dioxide (TiO2) inclusions

Likely iron-rich meteorite or hematite-rich rock

Uncertain; possible iron meteorite (Fe–Ni alloy) or limonite/goethite-bearing hematite

Goldstone

Aventurine Glass (SiO2 + Cu small inclusions)

Dyed or synthetic turquoise-blue glass-like specimen

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

Likely polished quartz or glass-like mineral cabochon

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

Gold Nugget

Native Gold (Au)

Industrial Slag

Anthropogenic Vitreous Slag

Metallic iron meteorite (probable)

Iron–nickel alloy, chiefly kamacite and taenite (Fe-Ni)

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

Silver-gray metallic ore, possibly galena-bearing rock

Likely galena (PbS) in a host rock, but identification is uncertain from the photograph

Goldstone

Avventurina (Cu + SiO2 glass)

Angel Aura Quartz (Treated Clear Quartz)

Silicon Dioxide (SiO2) coated with Vaporized Silver and Platinum

Likely iron meteorite or meteorite fragment

Unclassified meteoritic iron–nickel alloy, possibly an iron meteorite

Native Gold Nugget

Native Gold (Au)

Galena

Galena (lead sulfide, PbS)

Opalite (a synthetic glass, often confused with Opal)

Silicon dioxide glass (SiO2nH2O, for natural opal)

Likely galena (lead ore)

Galena, PbS (lead sulfide)

Faceted Glass (Costume Jewelry)

Amorphous Silicon Dioxide with colorants (Glass)

Chalcopyrite on Quartz

Copper Iron Sulfide (CuFeS2)

Galena (likely)

Galena, lead sulfide (PbS)

Likely raw galena fragment

Galena (lead sulfide, PbS), possibly with metallic sulfide matrix

Iridescent bismuth crystal

Bismuth (Bi), commonly laboratory-grown and oxide-coated

Iron meteorite fragment (likely metallic meteorite)

Fe–Ni kamacite/taenite alloy; exact identification requires testing

Galena-bearing ore (tentative)

Galena, lead sulfide (PbS), likely in a quartz/carbonate-rich matrix

Iron Meteorite

Siderite (Fe, Ni)

Likely galena-bearing ore

Galena (PbS), possibly mixed with quartz or carbonate gangue

Sunstone (Aventurine Feldspar)

(Ca,Na)((Al,Si)2Si2O8) with inclusions of Cu or Fe2O3

Chalcopyrite

Copper Iron Sulfide (CuFeS2)

Possible iron meteorite

Iron–nickel meteorite, commonly kamacite-taenite (Fe-Ni alloy)

Galena-bearing rock

Galena (PbS), likely with quartz or host-rock minerals

Likely iron meteorite

Iron meteorite, predominantly kamacite and taenite (Fe–Ni alloys)

Radiating stibnite crystals

Stibnite (antimony sulfide, Sb₂S₃)

Native Copper

Native Copper (Cu)

Pallasite Meteorite

Pallasite (Stony-Iron Meteorite)

Weathered metallic meteorite (probable iron meteorite)

Fe–Ni alloy, mainly kamacite and taenite; exact classification requires chemical and petrographic testing

Native copper-bearing rock (probable copper ore)

Native copper (Cu), likely with cuprite (Cu₂O), malachite (Cu₂CO₃(OH)₂), and iron-oxide matrix

Silver (Native Silver Mineral)

Ag (Native Silver), Alloyed 90% Ag / 10% Cu

Arsenic (Native)

Arsenic (As)

Polished hematite (specimen identification uncertain)

Hematite, α-Fe₂O₃