Man Made Alloy (Metallic)

Small metallic-gold mineral fragment, possibly pyrite

Pyrite (FeS₂), if confirmed

Asphalt (Bituminous Concrete)

Bituminous Concrete / Pavement

Cullet Glass (Strawberry Glass)

Amorphous Silicon Dioxide (SiO2) with metallic dopants

Cullet Glass (Man-made Glass Slag)

Amorphous Silica (SiO2) with chemical additives

Red Slag Glass (Cullet)

Amorphous Silicon Dioxide (SiO2) with metallic dopants

Galena-bearing ore

Galena (lead sulfide, PbS), likely with sphalerite and sulfide gangue

Cobalt Glass Slug (Man-made Glass)

Amorphous Silica with Cobalt Oxide (SiO2 + CoO)

Blue Goldstone

Aventurine Glass (Silicon Dioxide infused with Cobalt/Copper)

Goldstone (Synthetic Aventurescence Glass)

Cuprous Aventurescent Glass (Silicon Dioxide with Copper inclusions)

Galena-bearing sulfide fragment

Galena (PbS), possibly with quartz or carbonate gangue

Basalt

Basalt

Galena

Galena (lead sulfide, PbS)

Raw metallic sulfide specimen, likely galena

Galena (lead sulfide, PbS), possibly mixed with sphalerite or chalcopyrite

Copper ore (likely cuprite-bearing copper mineralization)

Cuprite, Cu₂O, possibly mixed with native copper and iron oxides

Aventurine

Silicon Dioxide (SiO2) with inclusions of Fuchsite

Small metallic-looking mineral/rock fragment

Indeterminate from image; possibly galena, hematite, or metallic slag

Copper

Native Copper (Cu)

Likely galena-bearing ore specimen

Galena (PbS), possibly with quartz or calcite gangue

Polished native copper

Native copper (Cu), likely with cuprite/tenorite oxidation products

Red glassy cabochon, likely synthetic ruby or red glass

Uncertain; possible synthetic corundum (Al₂O₃, chromium-colored) or man-made glass

Tumbled opalite (likely synthetic glass)

Opalite; typically man-made opalescent soda-lime glass, not a recognized mineral species

Native Copper

Native Copper (Cu)

Gold (Elemental Metal)

Gold (Au)

Likely metallic mineral specimen

Probably galena (lead sulfide, PbS), though visual identification is uncertain

Copper-rich rock, likely native copper-bearing material

Native copper (Cu), possibly mixed with cuprite/iron oxides in a copper-rich matrix

Pyrite

Iron Disulfide (FeS2)

Basalt

Basalt (Mafic volcanic rock)

Iron Meteorite

Iron Meteorite (primarily Kamacite and Taenite, Fe-Ni alloys)

Tumbled hematite

Hematite (Fe₂O₃), likely specular or massive hematite

Likely iron-rich rock or weathered metallic mineral fragment

Uncertain; possibly limonite/goethite or iron-bearing slag

Green Agate

Silicon dioxide (SiO₂)

Bog Iron / Limonite Concretion

Goethite/Limonite mixture (FeO(OH)·nH2O)

Polished native copper nugget

Native copper (Cu), likely with cuprite/tenorite and iron-oxide alteration

Native copper-bearing rock

Native copper (Cu), likely with copper oxides/carbonates in a host rock

Basalt

Basalt

Possible iron meteorite

Iron meteorite, likely an ataxite or coarse octahedrite; composition mainly Fe–Ni alloy

Slate

Metamorphic Pelitic Rock

Bismuth

Bismuth (Bi)

Gold Nugget

Native Gold (Au)

Iridescent bismuth crystal

Bismuth (Bi), commonly laboratory-grown and oxidized

Brick

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

Bismuth Crystal

Bismuth (Bi)