Mineral, Metal (Element)

Amethyst (in jewelry)

Silicon Dioxide (SiO2) with iron impurities

Man-made Slag (Industrial Byproduct)

Anthropogenic Glassy Residue

Tumbled amethyst

Amethyst, purple quartz (SiO₂)

Amethyst cabochon ring

Amethyst, purple quartz (SiO₂), colored primarily by iron-related defects and irradiation

Milky Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Ruby (set in a ring; possibly synthetic or imitation)

Corundum, Al₂O₃; red color is typically caused by chromium

Native silver fragment (probable)

Silver, Ag; possibly silver-bearing sulfide or plated metal

Quartz-rich metallic sulfide ore (probable pyrite-bearing rock)

Pyrite, FeS₂, in a quartz-rich host; exact identification is uncertain from the image

Rose Quartz and Lepidolite in Pegmatite

Crystalline Silicon Dioxide (SiO2) with Lithium-rich Mica (K(Li,Al)3(Al,Si)4O10(F,OH)2)

Granite

Felsic intrusive igneous rock

Quartz-bearing pyrite–chalcopyrite specimen

Pyrite (FeS₂), likely chalcopyrite (CuFeS₂), with quartz (SiO₂)

Bauxite

Bauxite (mixture including Gibbsite Al(OH)3, Boehmite γ-AlO(OH), and Diaspore α-AlO(OH))

Granite

Intrusive Igneous Rock

Gold-Bearing Quartz Ore

Crystalline Silicon Dioxide (SiO2) with Trace Aurum (Au)

Faceted transparent gemstone, likely glass or cubic zirconia

Uncertain from image; possible cubic zirconia (zirconium dioxide, ZrO₂) or glass imitation

Iridescent bismuth crystal

Bismuth (Bi), commonly laboratory-grown and oxidized

Copper Ore

Native Copper (Cu) often found with Chalcocite (Cu2S) or Bornite (Cu5FeS4)

Diamond

Carbon (C)

Aura Quartz

Silicon Dioxide (SiO2) with Titanium/Metal vapor coating

Milky Quartz Pebble

Silicon Dioxide (SiO2)

Decorative gemstone-chip jewelry (likely turquoise, coral, and assorted beads)

Predominantly turquoise, CuAl₆(PO₄)₄(OH)₈·4H₂O; other pieces appear to be dyed coral or red stone, and possibly shell/metal components

Quartz (River Pebble)

Silicon Dioxide (SiO2)

Gossan (Iron Cap)

Limonitic Gossan (Fe2O3·nH2O mixed)

Beryl (Aquamarine)

Be3Al2Si6O18

Gossan (Iron Hat)

Hydrous Iron Oxides (predominantly Goethite FeO(OH) and Limonite)

Native Copper

Native Copper (Cu)

Granite

Felsic intrusive igneous rock

Red Sandstone

Quartz Arenite (with Iron Oxide)

Gossan (Limonite/Goethite)

Hydrated iron oxides (primarily FeO(OH)·nH2O)

Vanadinite

Vanadinite (Pb5(VO4)3Cl)

Pink Lepidolite

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

Rose quartz (likely)

Quartz, silicon dioxide (SiO₂), commonly massive rather than visibly crystalline

Clear quartz crystal pendant

Quartz (silicon dioxide, SiO₂)

Green Schist

Greenschist (Chlorite Schist)

Diamond

Carbon (C)

Moss Agate

Chalcedony (SiO2) with inclusions of manganese or iron oxides

Moss Agate

Silicon dioxide (SiO2) with inclusions

Granite

Felsic intrusive igneous rock

Granite

Felsic intrusive igneous rock

Pyrite

Iron Sulfide (FeS2)

Diamond

Carbon (C)

Sandstone

Arenite (SiO2 based)