Man Made Alloy (Metallic)

Slag Glass (Leland Blue variant)

Anthropogenic Vitreous Silicate

Smelter Slag

Anthropogenic Silicate Slag

Asphalt Chunk

Asphalt concrete

Galena (lead ore)

Galena, PbS (lead sulfide)

Iron Meteorite (likely an Individual specimen)

Iron Meteorite (Group IAB, IIAB, IIIAB, etc., Fe-Ni alloy)

Tumbled black obsidian (likely)

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

Copper-bearing sulfide ore, possibly chalcopyrite-rich

Chalcopyrite (CuFeS₂), possibly with bornite and oxidation products

Iron Meteorite Fragment

Siderite (Geological term for iron meteorite class - Fe/Ni alloy)

Bismuth Crystal

Bismuth (element symbol Bi, atomic number 83)

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

Native bismuth

Bismuth (Bi), commonly with a naturally oxidized surface

Unknown metallic sulfide-bearing rock, possibly chalcopyrite or bornite

Tentative: chalcopyrite (CuFeS₂) or bornite (Cu₅FeS₄)

Probable metallic meteorite fragment

Unclassified iron meteorite candidate, chiefly kamacite (α-Fe–Ni alloy)

Native bismuth

Bismuth (Bi), commonly forming hopper crystals or aggregates

Iron meteorite fragment (probable)

Fe–Ni metallic meteorite, commonly octahedrite (kamacite–taenite)

Purple glassy pebble, possibly slag glass

Unidentified; likely man-made glass rather than a natural mineral

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 Sea Glass

Amorphous Silica (man-made glass), SiO2 + additive metal oxides

Galena

Galena (lead sulfide, PbS)

Chert (Arrowhead/Artifact Fragment)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Stibnite (antimonite)

Stibnite, Sb₂S₃

Specular Hematite (Specularite)

Iron Oxide (Fe2O3)

Native copper nugget

Copper (Cu), commonly with cuprite and copper-oxide alteration

Libyan Desert Glass

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

Michigan Float Copper

Native Copper (Cu)

Blue slag glass / industrial smelter slag

Man-made iron-rich silicate slag; composition variable, commonly Fe–Ca–Mg–Al silicates with glassy phases

Silicon

Element Si

Green Aura Quartz

Silicon Dioxide (SiO2) bonded with metallic vapors (typically Gold, Chromium, or Titanium)

Silicon

Element Si

Metallic meteorite fragment (probable stony-iron or iron meteorite)

Undetermined meteoritic Fe–Ni alloy with silicate minerals

Aura Quartz (Anomalously Coated Quartz)

Silicon Dioxide (SiO2) treated with vaporized metals

Iron meteorite (probable)

Fe–Ni metallic meteorite, possibly an iron meteorite such as a coarse octahedrite

Nickel–iron meteorite (likely weathered iron meteorite)

Fe–Ni alloy, chiefly kamacite and taenite

Likely galena-bearing ore

Galena (lead sulfide, PbS), possibly with quartz or calcite gangue

Iron Meteorite

Iron-nickel alloy (e.g., Kamacite, Taenite)

Native copper nugget

Copper (Cu), native element

Native Gold Flake

Gold (Au)

Silver (Native Element)

Ag (Argentum) - 90% Silver, 10% Copper alloy in specimen