Mineral (Metal)

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)

Clear faceted gemstone in a metal jewelry setting (likely imitation glass or cubic zirconia)

Unidentified transparent faceted stone; possibly cubic zirconia (ZrO₂) or glass

Tumbled hematite

Hematite (Fe₂O₃), likely polished specular hematite

Rhyolite

Extrusive igneous rock (felsic)

Gold Nugget

Native Gold (Au)

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

Gold Ore

Native Gold (Au) in Matrix

Aura Quartz

Silicon Dioxide (SiO2) with metallic vapor coating

Bauxite

Bauxite (mixture of Hydrous Aluminum Oxides)

Opalite

Synthetic Glass / Man-made Opal Simulant

Schist (Diamond Drill Core)

Mica Schist

Bismuth Crystal

Bismuth (Bi)

Pallasite Meteorite

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

Polished dendritic agate cabochon

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

Zinc Alloy (Silver-plated)

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

Native Silver

Silver (elemental Ag)

Pyrite

Iron Sulfide (FeS2)

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

Slag (Industrial Glassy Byproduct)

Ferro-silicate Slag

Bauxite

Bauxite (mixture of hydrous aluminum oxides: Al(OH)3 & AlO(OH))

Gold (Elemental Metal)

Gold (Au)

Aura Quartz (Titanium/Gold coated)

Silicon Dioxide (SiO2) with metallic vapor deposition

Turquoise-colored bead on a metal earring

Unidentified blue-green bead; possibly turquoise (CuAl₆(PO₄)₄(OH)₈·4H₂O), but the image cannot confirm its material

Amethyst

Quartz (Silicon Dioxide, SiO2)

Unidentified gray metallic object

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

Granite

Plutonic Igneous Rock

Galena in Quartz Matrix

Lead Sulfide (PbS) in Silicon Dioxide (SiO2)

Man-made Jewelry Charm (Enameled Metal)

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

Black onyx bead necklace

Black chalcedony, a microcrystalline quartz variety (SiO₂); beads may be dyed or treated

Granite

Intrusive Igneous Rock

Silver (Jewelry Specimen)

Native Silver (Chemical Formula: Ag)

Metal Chain (Likely Steel or a Steel Alloy)

Steel (primarily iron and carbon); specific alloy unknown

Gabbro (likely with Pyrite/Sulfide mineralization)

Mafic Intrusive Igneous Rock

Red garnet cabochon pendant

Likely almandine garnet, iron-rich garnet-group silicate (often approximated as Fe₃Al₂(SiO₄)₃); identification from the image is uncertain.

Granite

Intrusive Igneous Rock

Iron-rich meteorite candidate (weathered iron meteorite)

Likely Fe–Ni metal, commonly kamacite and taenite; definitive identification requires laboratory testing

Granite

Felsic intrusive igneous rock

Granite

Felsic intrusive igneous rock

Granite

Intrusive Igneous Rock

Granite

Intrusive Igneous Rock (Felsic)