Mineral, Metal (Element)

Bauxite

Bauxite (Al(OH)3, AlO(OH))

Quartz-rich granitic rock, possibly pegmatite

Granite or granitic pegmatite; primarily quartz (SiO₂), feldspar, and minor mica/iron oxides

Yellow Beryl (Heliodor)

Beryllium aluminum silicate (Be3Al2Si6O18)

Marble

Recrystallized Calcite (CaCO3)

Green aventurine pendant

Quartz variety, SiO₂, colored mainly by fuchsite or other chromium-bearing mica inclusions

Milky Quartz

Silicon Dioxide (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Copper Ore (likely Malachite or Chrysocolla staining)

Copper Secondary Mineral (e.g., Cu2CO3(OH)2)

Beryl in Quartz Matrix

Beryllium Aluminum Silicate (Be3Al2Si6O18)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Bornite

Cu5FeS4

Celestite (Celestine)

Strontium sulfate (SrSO4)

Copper Ore with Malachite and Chrysocolla

Cu2CO3(OH)2 (Malachite) with Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O (Chrysocolla)

Multicolor quartz bead bracelet

Quartz (silicon dioxide, SiO₂); bead colors may be from different varieties or treated quartz

Bauxite

Aluminium ore (Hydrated aluminium oxides AlOx(OH)3-2x)

Limonite-stained Gossan/Ironstone

Goethite and Hematite (Fe2O3 • nH2O)

Quartz-rich pegmatite (possibly tourmaline-bearing)

Granitic pegmatite; chiefly quartz (SiO₂), feldspar, and dark mica/amphibole

Copper Ore with Malachite and Chalcocite

Copper-bearing Mineral Assemblage (Cu2CO3(OH)2 + Cu2S)

Lepidolite

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

Beryl (likely var. Aquamarine or Goshenite) in Matrix

Beryllium Aluminum Silicate (Be3Al2Si6O18)

Mystic Topaz (Treated Quartz or Topaz)

Aluminum silicate fluoride hydroxide [Al2SiO4(F,OH)2] with thin-film metallic coating

Likely iron-rich meteorite or hematite-rich rock

Uncertain; possible iron meteorite (Fe–Ni alloy) or limonite/goethite-bearing hematite

Amber cabochon pendant

Amber (fossilized tree resin; chiefly polymerized terpenoids)

Pyrite in Quartz

Silicon Dioxide (SiO2) with Iron Sulfide (FeS2)

Quartz Vein / Quartz Matrix

Silicon Dioxide (SiO2)

Granite

Felsic intrusive igneous rock

Colorless Quartz (Rhinestone)

Silicon Dioxide (SiO2)

Amber jewelry (possibly amber-colored glass or resin)

Amber — fossilized plant resin, chiefly composed of polymerized terpenoids; the pictured material cannot be confirmed from the image

Bismuth crystal

Bismuth (Bi), commonly laboratory-grown

Bismuth crystal aggregate

Bismuth (Bi), commonly laboratory-grown

Granite

Intrusive Igneous Rock

Granite

Intrusive Igneous Rock

Bauxite

Bauxite (Al2O3·2H2O)

Amygdaloidal Basalt

Extrusive mafic igneous rock with amygdules

Granite

Phaneritic Felsic Intrusive Igneous Rock

Bauxite

Al2O3·2H2O (Aluminum Hydroxide)

Granite

Granite (Intrusive Igneous Rock)

Pyrite

Iron Sulfide (FeS2)

Green Aura Quartz (Titanium treated Kyanite or Quartz)

Silicon Dioxide (SiO2) or Aluminum Silicate (Al2SiO5) with Titanium/Metal Oxide coating

Native metal specimen, likely galena or metallic slag

Probably galena (lead sulfide, PbS); identification is uncertain from the image alone

Lepidolite

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

Celestite (Celestine)

Celestine (Strontium Sulfate, SrSO4)