Man Made Alloy (Metallic)

Pyrite in Matrix

Iron Sulfide (FeS2)

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Basalt

Basalt

Pyrite

Iron Sulfide (FeS2)

Terrazzo (with Marble and Granite fragments)

Cementitious or resinous composite containing Calcium Carbonate (CaCO3) and Silicates

Blue Goldstone

Aventurine Glass

Goldstone and Aura Quartz

Cuprous Glass (Goldstone) and Titanium-coated SiO2 (Aura Quartz)

Pyrite

Iron Sulfide (FeS2)

Goldstone and pink quartz bead strands

Goldstone is aventurescent copper-bearing glass; pink beads are likely rose quartz (SiO₂), though dyed or glass imitations are possible

Diamond in Gold Setting

Diamond (C - pure carbon)

Native silver fragment (probable)

Silver, Ag; possibly silver-bearing sulfide or plated metal

Tumbled iron-rich stone, likely hematite-bearing jasper

Jasper (microcrystalline quartz, SiO₂) with iron oxides, chiefly hematite/goethite

Pallasite Meteorite

Pallasite (Stony-iron meteorite; Fe-Ni alloy with (Mg,Fe)2SiO4 olivine)

Vesicular basalt (likely scoria)

Basaltic scoria; predominantly plagioclase, pyroxene, and olivine in a mafic volcanic glass/microcrystalline matrix

Gold

Aurum (Elemental Gold, Au)

Fired Clay Brick (Anthropic Rock substitute)

Anthropogenic polycrystalline ceramic (predominantly Mullite and Quartz: Al6Si2O13 + SiO2)

Lepidolite in Quartz Matrix

K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2

Diorite (River Pebble)

Intermediate Phaneritic Igneous Rock

Lapis lazuli and green-blue chalcedony jewelry

Lapis lazuli: lazurite-bearing metamorphic rock, chiefly lazurite (Na₃Ca(Al₃Si₃O₁₂)S) with calcite and pyrite; second stone: likely chrysoprase or green-blue chalcedony (microcrystalline quartz, SiO₂)

Weathered metallic fragment, possibly iron meteorite or industrial slag

Uncertain; candidate iron meteorite (Fe–Ni alloy), but terrestrial slag or corroded metal is also plausible

Iron Slag

Ferrous slag (primarily silicates and oxides of calcium, iron, and magnesium)

Slag (Industrial Byproduct)

Ferro-silicate glass (Slag)

Pyrite

Iron Sulfide (FeS2)

Milky Quartz

Silicon Dioxide (SiO2)

Fossilized Shark Tooth (Fragment)

Elasmobranchii gen. et sp. indet. (Calcium Phosphate / Apatite fossil)

Diabase (Dolerite)

Diabase or Dolerite

Native gold (gold nugget)

Native gold, Au; commonly alloyed with silver and copper (electrum when silver-rich)

Lapis lazuli bead bracelet

Lapis lazuli, chiefly lazurite (Na₃Ca(Si₃Al₃)O₁₂S); commonly with calcite and pyrite

Possible basalt or iron-rich slag

Basalt (tentative; identification uncertain from image)

Polished blue calcite sphere (tentative identification)

Calcite, CaCO₃; blue color generally results from trace impurities or inclusions

Polished iron meteorite fragment

Iron meteorite, chiefly kamacite and taenite (Fe–Ni alloys), possibly weathered or etched

Coal (Anthracite / Bituminous)

Organic Sedimentary Rock (Carbon-based)

Bismuth

Bismuth (Bi)

Pyrite

Iron Disulfide (FeS2)

Aquamarine

Beryl (Be3Al2Si6O18 with Fe impurities)

Diamond (in a gold ring)

Diamond (pure carbon, C)

Granodiorite

Granodiorite

Buffalo Nickel (Indian Head Nickel)

Cupronickel (75% Copper, 25% Nickel)

Tumbled aqua glassy mineral specimen, likely chrysocolla or turquoise imitation

Uncertain from image; possible chrysocolla (hydrated copper aluminosilicate, variable composition) or dyed/man-made glass

Copper Ore

Mixed copper sulfides/oxides in gangue matrix

Milky Quartz

Silicon dioxide (SiO2)

Native copper-rich iron meteorite (likely Canyon Diablo/meteorite-like specimen)

Iron–nickel alloy, chiefly kamacite and taenite (Fe-Ni), with oxidized copper/iron sulfide inclusions