Metal (Elemental Mineral)

Gold Nugget / Placer Gold

Native Gold (Au)

Native Copper

Native Copper (Cu)

Weathered iron-rich chert or siliceous breccia

Microcrystalline quartz (SiO₂), likely with iron oxides and minor clay minerals

Polished pink quartzite (likely with chlorite inclusions)

Quartzite; predominantly quartz (SiO₂), with minor chlorite or amphibole inclusions

Gold Ore

Native Gold (Au) in Matrix

Tiny metallic-looking mineral or rock fragment

Unidentifiable from the image; possibly a small metallic mineral grain

Faceted brown gemstone pendant, likely smoky quartz or champagne topaz

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

Rough Diamond

Diamond (C - Carbon)

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

Small stud earring with a purple gemstone (possibly amethyst)

Possible amethyst, a purple variety of quartz (SiO₂); identification is uncertain from the image

Nugget of Native Silver

Native Silver (Ag)

Likely anthracite coal

Anthracite, a carbon-rich coal (predominantly elemental carbon)

Amethyst

Quartz (Silicon Dioxide, SiO2)

Silver (Jewelry Specimen)

Native Silver (Chemical Formula: Ag)

Lepidolite in Quartz

K(Li,Al)3(Si,Al)4O10(F,OH)2 / SiO2

Copper Ore (Malachite and Azurite on Host Rock)

Cuprite, Malachite, and Azurite dissemination in gangue

Man-made Metal Pin (Non-geological)

Antimony-Lead Alloy or Zinc/Brass Base with Electroplating

Copper and Quartz beads

Native Copper (Cu) and Crystalline Quartz (SiO2)

Silver (Native Element)

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

Aura Quartz (Cranberry or Magenta Aura Quartz)

Silicon dioxide coated with titanium/niobium (SiO2)

Aura Quartz (Anomalously Coated Quartz)

Silicon Dioxide (SiO2) treated with vaporized metals

Gemstone ring (stones not reliably identifiable from the image)

Likely faceted yellow stones and clear stones set in a metal band; species and treatments are indeterminate visually

Schist (Diamond Drill Core)

Mica Schist

Iron-stained vesicular volcanic rock (probable basalt/scoria)

Altered basaltic scoria; chiefly plagioclase, pyroxene, olivine, and iron oxides

Polished dendritic agate cabochon

Microcrystalline quartz (chalcedony), SiO₂, with iron/manganese dendrites and possible plume inclusions

Cut diamond tennis-chain jewelry

Diamond, crystalline carbon (C), cubic crystal system

Copper Ore (Malachite/Chrysocolla bearing)

Cupriferous rock containing secondary copper minerals like Cu2CO3(OH)2

Small metallic mineral fragment

Indeterminate; possibly galena, hematite, magnetite, or metallic meteorite fragment

Blue topaz-style pendant (stone identity uncertain)

Possibly blue topaz (Al₂SiO₄(F,OH)₂); the image cannot confirm whether the stone is natural or synthetic

Quartz Vein in Host Rock

Silicon dioxide (SiO2) veins in metamorphic/igneous host rock

Lepidolite

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

Aluminum Slag

Anthropogenic Aluminum (Al)

Zinc Alloy (Silver-plated)

Zinc Alloy Casting (Zn-Al-Mg-Cu)

Silver

Ag (Native Silver)

Gold (10K Alloy)

Aurum (Au) with alloying metals (Cu, Ag, Zn)

Silver Nugget

Native Silver (Ag)

Aluminum Slag

Anthropogenic Aluminum (Al)

Unidentified gray metallic object

Not determinable from the image; likely a metal screw or manufactured fastener rather than geological material

Bismuth

Native Bismuth (Bi)

Man-made Jewelry Charm (Enameled Metal)

Not a natural mineral; composed of base metal alloy (likely zinc or brass) and epoxy resin/enamel.

Galena in Quartz Matrix

Lead Sulfide (PbS) in Silicon Dioxide (SiO2)