Metal (Elemental Mineral)

Gold Nugget

Native Gold (Au)

Gold

Native Gold (Au)

Rough Blue Diamond

Carbon (C) - Type IIb Diamond

Magnetite / Iron Ore

Magnetite (Fe3O4)

Hematite

Iron(III) oxide (Fe2O3)

Gold Nugget

Native Gold (Au)

Gold flakes

Native Gold (Au)

Gold

Native Gold (Au)

Hematite

Iron(III) oxide (Fe2O3)

Amethyst and Hematite Bracelet

Amethyst (SiO2) and Hematite (Fe2O3)

Gold

Native Gold (Au)

Black Sand (Magnetite Sand)

Magnetite (Fe3O4)

Pyrite

Iron Sulfide (FeS2)

Placer Gold Nugget

Native Gold (Au)

Gold Ore (in Quartz/Gossan matrix)

Native Gold (Au) in Limonite/Quartz matrix

Graphite

Graphite (Native Carbon, C)

Pyrite

Iron Sulfide (FeS2)

Hematite

Iron(III) oxide (Fe2O3)

Pyrite

Iron Sulfide (FeS2)

Hematite

Iron(III) oxide (Fe2O3)

Hematite (Iron Ore)

Hematite (Fe2O3)

Specular Hematite (Specularite)

Iron Oxide (Fe2O3)

Titanium-Coated Hematite (Aura Hematite)

Titanium-bonded Hematite (Fe2O3 with a Ti coating)

Pyrite

Iron Sulfide (FeS2)

Gold Nugget

Native Gold (Au)

Magnetite Orthorthotropic Rock

Magnetite (Fe3O4)

Native Copper

Copper (Cu)

Basalt

Aphanitic Mafic Igneous Rock

Mica / Muscovite or Biotite

Phyllosilicate mineral group (e.g., KAl2(AlSi3O10)(OH)2)

Basalt

Basalt (composition predominately Plagioclase feldspar and Pyroxene)

Gold

Native Gold (Au)

Peacock Ore (Treated Chalcopyrite)

Copper Iron Sulfide (CuFeS2) coated with oxides

Hematite

Hematite (Fe2O3)

Lapis Lazuli

Complex silicate rock containing lazurite, calcite, and pyrite

Hematite

Hematite (Fe2O3)

Green Aventurine

Quartz (SiO2) with fuchsite inclusions

Rainbow Pyrite

Iron Sulfide (FeS2) with iridescent oxidation

Bismuth Crystal

Bismuth (Bi)

Quartz with inclusions

SiO2

Labradorite

Labradorite ((Ca, Na)(Al, Si)4O8)

Quartz with Chalcopyrite (or Pyrite)

Silicon Dioxide (SiO2) with Copper Iron Sulfide (CuFeS2)

Sunstone (Feldspar variety)

(Ca,Na)(Al,Si)4O8 with Hematite or Goethite inclusions