Metal (Elemental Mineral)

Gold Nugget

Native Gold (Au)

Aura Quartz / Rainbow Aura Quartz

Silicon Dioxide (SiO2) with metallic vapor coating

Native Copper

Native Copper (Cu)

Granite

Intrusive Igneous Rock

Granite

Granite

Copper-bearing chrysocolla/azurite host rock (probable)

Chrysocolla, Cu₂H₂Si₂O₅(OH)₄·nH₂O, with possible azurite Cu₃(CO₃)₂(OH)₂ in iron-stained quartz/matrix

Sphalerite in Chalcedony (Crescent Carving)

Zinc Sulfide (ZnS) with Silicon Dioxide (SiO2)

Druzy Quartz

Silicon Dioxide (SiO2)

Mixed gemstone bead bracelet

Likely rose quartz, amethyst, and possibly rhodonite or lepidolite beads

Bauxite

Bauxite (Al2O3·2H2O)

Quartz Vein in Host Rock (Likely Slate or Shale)

Hydrothermal Quartz (SiO2) in Pelitic host rock

Limonite with Quartz (Gossan)

Hydrated iron(III) oxide-hydroxide mixture (FeO(OH)·nH2O) with Silicon Dioxide (SiO2)

Limonite (Iron Ore)

Limonite (FeO(OH)·nH2O)

Gold Nugget

Native Gold (Au)

Small faceted gemstone, likely diamond

Diamond (crystalline carbon, C)

Ruby and Sapphire Cluster Ring

Corundum (Al2O3)

Granite

Intrusive Igneous Rock

Garnet-set butterfly brooch

Likely almandine or pyrope garnet, iron–aluminum silicate (Fe₃Al₂Si₃O₁₂ or Mg₃Al₂Si₃O₁₂)

Quartz Pebble

Silicon Dioxide (SiO2)

Natural Gold Nugget

Native Gold (Au)

Silver (Native or Alloyed)

Ag (Argentum)

Copper Bullion Round

Native Copper (refined), Cu

Not a geological specimen

N/A (man-made object)

Sandstone (Quartzose Sandstone / Feldspathic Sandstone)

SiO2 with minor impurities (Fe2O3, KAlSi3O8)

Serpentinite

Serpentinite (Hydrated magnesium iron phyllosilicate)

Gold Flakes

Native Gold (Au)

Gold Flake

Native Gold (Au)

Copper Nugget

Native Copper (Cu)

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Aura Quartz Geode (Angel Aura Quartz)

Silicon Dioxide (SiO2) bonded with precious metals

Aura Quartz (Pink/Magenta Aura Quartz)

Silicon Dioxide (SiO2) treated with vapor-deposited precious metals

Gossan (Iron Hat)

Iron oxide-rich weathered rock (primarily Limonite and Goethite with secondary Quartz)

Aura Quartz

Titanium or Gold bonded Silicon Dioxide (SiO2)

Cubic Zirconia (as used in jewelry setting)

Zirconium dioxide (ZrO2)

Greenstone or Chlorite Schist

Greenschist / Chlorite schist

Amber Inlay Jewelry

Fossilized Resin (C10H16O)

Quartz Vein in Schist / Gneiss

Silicon Dioxide (SiO2) in Metamorphic Matrix

Vesicular basalt (possibly industrial slag)

Basalt, chiefly plagioclase + pyroxene ± olivine; exact identification is uncertain from the image

Milky Quartz Vein in Mafic Rock

Quartzite vein in Metabasalt (SiO2 base)

Iron Meteorite Fragment

Siderite (Geological term for iron meteorite class - Fe/Ni alloy)

Green Aventurine

Silicon Dioxide (Quartz with Fuchsite inclusions), SiO2