Mineral (Metal)

Copper Ore (with Malachite/Chrysocolla and Iron Oxides)

Secondary Copper Minerals (Cu2(CO3)(OH)2 / (Cu,Al)2H2Si2O5(OH)4·nH2O)

Quartz vein in dark metamorphic rock

Likely quartz-rich vein cutting a biotite- or amphibole-rich metamorphic host; exact host rock cannot be confirmed from the image

Gold Flakes

Native Gold (Au)

Quartz Vein / Milky Quartz

Silicon Dioxide (SiO2)

Gold Nuggest

Native Gold (Au)

Gold

Native Gold (Au)

Silver (Jewelry form)

Native Silver (Ag)

Amygdaloidal Basalt

Basalt with secondary mineral infilling

Rounded river pebble, possibly iron-rich quartzite or basalt

Indeterminate from image; likely fine-grained basalt (mafic silicate rock) or ferruginous quartzite

Native gold nugget or flake

Native gold (Au), possibly with minor silver/electrum

Sunstone

Plagioclase Feldspar (Na,Ca)(Al,Si)4O8

Peridot (Olivine)

Magnesium Iron Silicate (Mg, Fe)2SiO4

Granite

Intrusive Igneous Rock

Iron-stained Quartz (Gossan/Limonite-coated Quartz)

Silicon Dioxide (SiO2) with Hydrated Iron Oxides (FeO(OH)·nH2O)

Quartz Vein Rock

Quartz (Silicon Dioxide, SiO2)

Aura Quartz Geode (Angel Aura Quartz)

Silicon Dioxide (SiO2) bonded with precious metals

Quartz Vein on Matrix

Silicon Dioxide (SiO2)

Ferruginous Sandstone

Sandstone with Iron Oxide (Limonite/Goethite)

Blue-green agate bead bracelet

Chalcedony (microcrystalline quartz, SiO₂), likely dyed blue-green

Quartz crystal pendant

Quartz (silicon dioxide, SiO₂), likely rock crystal or milky quartz

Quartz Vein in Host Rock

Silicon Dioxide (SiO2) within Sedimentary or Igneous Matrix

Blue slag glass / industrial glass fragment

Artificial silicate glass, composition variable; likely copper- or cobalt-colored furnace slag

Quartz Pebble

Silicon Dioxide (SiO2)

Aura Quartz / Rainbow Aura Quartz

Silicon Dioxide (SiO2) with metallic vapor coating

Granite

Granite

Amethyst cabochon jewelry

Amethyst, purple variety of quartz (SiO₂)

Lepidolite

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

Cubic Zirconia (Man-made)

Cubic Zirconia (ZrO2) with Enamel and Metal Alloy

Amber Inlay Jewelry

Fossilized Resin (C10H16O)

Blue Calcite

Calcium Carbonate (CaCO3)

Granite

Intrusive Igneous Rock

Natural Gold Nugget

Native Gold (Au)

Druzy Quartz

Silicon Dioxide (SiO2)

Pyrite

Iron Sulfide (FeS2)

Pink Granite

Granite

Granite

Felsic intrusive igneous rock

Granite

Intrusive Igneous Rock

Limonite with Quartz (Gossan)

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

Jade Ring

Nephrite or Jadeite

Zircon

Zircon (Zirconium Silicate, ZrSiO4)

Olivine (Peridot)

Magnesium Iron Silicate ((Mg, Fe)2SiO4)

Granite

Granite (Intrusive Igneous Rock)