Mineral (Refined Metal)

Milky Quartz with inclusions

Silicon Dioxide (SiO2)

Serpentine

(Mg,Fe)3Si2O5(OH)4

Granite

Felsic intrusive igneous rock

Celestite (Celestine)

Strontium sulfate (SrSO4)

Granite (with Beryl/Aquamarine)

Granite (Feldspar, Quartz, Mica, and Beryl Be3Al2Si6O18)

Gold-Bearing Quartz

Silicon Dioxide with Native Gold (SiO2 + Au)

Basalt with Quartz Vein

Basalt (fine-grained mafic igneous rock) with crystalline Quartz (SiO2)

Quartz Vein in Host Rock

Silicon Dioxide (SiO2) within Metasedimentary or Igneous matrix

Quartz Vein in Pelite (Metamorphic Rock)

Hydrothermal Quartz Veining in Metasedimentary Rock (SiO2)

Pyrite

Iron Sulfide (FeS2)

Milky Quartz with Iron Staining

Silicon Dioxide (SiO2)

Bauxite

Bauxite (Al2O3·2H2O mixed with iron oxides)

Slag

Ferrous slag (by-product of iron smelting)

Granite

Intrusive igneous rock composed mainly of quartz, alkali feldspar, and plagioclase

Vanadinite

Vanadinite (Pb5(VO4)3Cl)

Lepidolite

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

Native Copper with Malachite/Oxide Coating

Native Copper (Cu)

Olivine

(Mg,Fe)2SiO4

Unidentified dark mineral/rock fragment

Indeterminate; appearance may fit a sulfide-bearing rock or iron-rich mineral

Opalite

Synthetic glass / Opaque silicious glass

Bauxite

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

Bauxite

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

Granite

Plutonic Igneous Rock

Yellow Beryl (Heliodor)

Beryllium aluminum silicate (Be3Al2Si6O18)

Granite

Intrusive igneous rock

Purple fluorite crystal

Fluorite (calcium fluoride, CaF₂)

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)

Bauxite

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

Marble

Recrystallized Calcite (CaCO3)

Limonite (Iron Stone/Iron Ore)

FeO(OH)·nH2O (Hydrous ferric oxide)

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)

Limonite-stained Gossan/Ironstone

Goethite and Hematite (Fe2O3 • nH2O)

Bismuthinite with Chalcopyrite and Quartz

Bismuthinite (Bi2S3) and Chalcopyrite (CuFeS2)

Green aventurine pendant

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

Mystic Topaz (Treated Quartz or Topaz)

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

Lepidolite

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