Mineral (Refined Metal)

Beryl (Aquamarine)

Beryllium aluminum silicate (Be3Al2Si6O18)

Granite

Granite (Felsic Plutonic Rock)

Milky Quartz

Silicon Dioxide (SiO2)

Titanium Aura Quartz

Titanium-coated Silicon Dioxide (SiO2)

Black tourmaline (likely schorl), polished cabochon

Schorl tourmaline, NaFe3Al6(BO3)3Si6O18(OH)4

Milky Quartz

Quartz (Silica / Silicon Dioxide - SiO2)

Granite Pebble

Phaneritic intrusive igneous rock

Cream Marble (Speckled)

Metamorphosed Limestone (mainly CaCO3)

Green copper-bearing rock, likely chrysocolla-bearing quartz or host rock

Chrysocolla (Cu₂H₂Si₂O₅(OH)₄·nH₂O), possibly mixed with quartz and copper oxides

Granite

Phaneritic Felsic Igneous Rock

Chalcopyrite on Quartz

Copper Iron Sulfide (CuFeS2)

Native gold-bearing quartz vein specimen

Native gold (Au) in quartz, with possible iron-oxide and sulfide minerals

Gold-bearing Quartz

Auriferous Quartz (SiO2 with Native Gold inclusion)

Turquoise cabochon pendant

Turquoise, hydrated copper–aluminum phosphate: CuAl₆(PO₄)₄(OH)₈·4H₂O; likely stabilized or imitation turquoise

Possible weathered iron-rich rock or slag fragment

Indeterminate; likely limonite/goethite-bearing material, possibly iron slag

Polished moss agate pendant

Moss agate, a chalcedony variety of microcrystalline quartz (SiO₂), with green chlorite/actinolite inclusions

Granite Boulder

Felsic Intrusive Igneous Rock

Quartz Vein in Siltstone

SiO2 (Quartz) on clastic sedimentary matrix

Pallasite Meteorite (Sliced and Polished)

Pallasite (Iron-Nickel Matrix with Olivine crystals)

Peacock Ore (Chalcopyrite)

Chalcopyrite (CuFeS2)

Gossan (Limonite/Ironstone)

Hydrated Iron Oxide (FeO(OH)·nH2O)

Polished agate pendant

Microcrystalline quartz (chalcedony), SiO₂; agate is banded chalcedony

Granite

Intrusive Igneous Rock

Quartz Vein in Host Rock

Silicon Dioxide (SiO2) in matrix

Lepidolite

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

Native Platinum

Platinum (Pt)

Green aventurine pendant (likely)

Quartz, SiO₂, with green fuchsite inclusions (aventurescent quartz)

Limonite-stained Quartz

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

Quartz-veined Metamorphic Rock

Quartz Vein in Phyllite or Schist (SiO2 in Silicate Matrix)

Emerald in Matrix

Beryl (Be3Al2Si6O18) containing Chromium/Vanadium impurities

Gold Ore in Quartz

Native Gold (Au) in Quartz (SiO2) matrix

Milky Quartz

Silicon Dioxide (SiO2)

Zircon

Zircon (Zirconium Silicate - ZrSiO4)

Lepidolite

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

Quartz Pebble

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Lepidolite

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

Bismuth crystal

Bismuth (Bi), commonly laboratory-grown hopper crystal

Gold Nugget

Native Gold (Au)

Polished banded agate, likely moss or dendritic agate

Microcrystalline quartz (chalcedony), SiO₂, with iron/manganese inclusions

Gold Nugget

Native Gold (Au)

Sandstone (Quartzose)

Arenite (predominantly SiO2)