Mineral (Processed Metal)

Native Copper

Native Copper (Cu)

Quartz Vein in Host Rock

Silicon Dioxide (SiO2) within Metasedimentary or Igneous Matrix

Quartz Vein in Host Rock

Silicon Dioxide (SiO2) in Altered Host Rock

Gold Nugget

Native Gold (Au)

Likely small metallic meteorite fragments

Unclassified iron or stony-iron meteorite; mineralogy cannot be confirmed from the image

Limonite-stained Quartz

Silicon Dioxide (SiO2) with Hydrated Iron Oxide (FeO(OH)·nH2O) coatings

Pyrite-bearing rock, likely quartz vein

Pyrite (FeS₂) in quartz-rich host rock

Chrysocolla-bearing copper ore

Chrysocolla (hydrated copper aluminum silicate), likely with malachite/azurite and copper sulfides

Gold-bearing quartz vein rock (likely pyrite-rich quartzite)

Quartz (SiO₂) with iron sulfides, chiefly pyrite (FeS₂), possibly chalcopyrite (CuFeS₂); gold cannot be confirmed visually

Man-made Dyed Aura Quartz

Silicon Dioxide (SiO2) with metallic coating/dye

Green Aura Quartz

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

Quartz Vein in Schist

Quartz (SiO2) in Pelitic Schist

Cullet (Slag Glass)

Amorphous Silica (SiO2) with various metal oxide colorants

Milky Quartz with Chlorite / Mica inclusions

Silicon Dioxide (SiO2) with phyllosilicate inclusions

Ferrous Slag

Fused calcium-iron silicates (Industrial Slag)

Faceted brown gemstone pendant, likely smoky quartz or champagne topaz

Probably quartz (SiO₂), smoky variety; alternatively topaz (Al₂SiO₄(F,OH)₂)

Transit Token (RTD Denver)

Nickel-plated brass or bronze alloy (Cu-Sn-Zn-Ni)

Gold Ore in Matrix

Native Gold (Au) in Quartz/Host Rock

Pyrite (on Quartz/Host Rock)

Iron Sulfide (FeS₂)

Ferruginous Breccia

Breccia with Iron-rich (Hematite/Goethite) Matrix

Iron Gossan (Limonite/Goethite)

Hydrated Iron Oxides (FeO(OH)·nH2O) from oxidation zones

Man-made Blank Ammunition (Brass)

CuZn (Cartridge Brass - roughly 70% Copper, 30% Zinc)

Barite

Barium Sulfate (BaSO4)

Opalite

Synthetic Opalised Glass

Serpentinite

Serpentinite (composed primarily of mineral group (Mg,Fe,Ni,Al)3Si2O5(OH)4)

Clear Quartz (Rock Crystal) Bead

Silicon Dioxide (SiO2)

Copper Ore (Malachite, Azurite, and Chalcopyrite in Host Rock)

Copper-bearing polymetallic mineral aggregate (Cu-minerals)

Copper Ore (Chrysocolla/Malachite in host rock)

Hydrated copper phyllosilicate and copper carbonate hydroxide

Milky Quartz Vein Rock

Silicon Dioxide (SiO2)

Cubic Zirconia (CZ)

Zirconium dioxide (ZrO2)

Green iridescent glass cabochon or synthetic gemstone

Likely synthetic glass; possibly coated synthetic quartz or lab-created green gemstone

Gypsum (Wallboard/Drywall)

Calcium Sulfate Dihydrate (CaSO4·2H2O)

Granite featuring Quartz Vein

Granite with hydrothermal silica (SiO2) intrusion

Rounded metallic-looking pebble, likely iron-rich rock or slag

Uncertain; possible limonite/goethite-rich ironstone, hematite-bearing material, or industrial slag

Serpentinite

Serpentinite (composed primarily of Serpentine group minerals: (Mg,Fe)3Si2O5(OH)4)

Gold Ore

Native Gold (Au)

Polished hematite bead (probable)

Hematite, Fe₂O₃

Milky or Iron-Stained Quartz

Quartz (Silicon Dioxide, SiO2)

Bauxite

AlOx(OH)3-2x (mixture of Gibbsite, Boehmite, and Diaspore)

Synthetic Zinc/Polycarbonate Composite (Bey-specimen)

Zinc Alloy (Zamak 3) with Polycarbonate (C15H16O2)n Overlay

Gold

Native Gold (Au)

Road-surface aggregate (crushed stone)

Unidentifiable mixed lithic aggregate; likely basaltic/andesitic fragments with feldspar, quartz, and weathered rock