Mineral (Processed Metal)

Likely metallic mineral specimens

Probably native iron or iron oxide/hydroxide material; exact identification requires testing

Amethyst Cluster

Silicon Dioxide (Quartz variety: Amethyst) - SiO2

Iron-stained quartz-bearing rock

Quartz (SiO₂), likely in a limonite/goethite-rich matrix

Native Copper

Native Copper (Cu)

Granite

Felsic intrusive igneous rock

Green glass sphere/marble

Soda-lime glass (primarily SiO2, Na2O, CaO)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Quartzite

Quartzite (SiO2)

Granite

Felsic intrusive igneous rock

Hematite bead bracelet

Hematite (Fe₂O₃), likely polished or magnetically enhanced beads

Diorite (Salt and Pepper Rock)

Phaneritic Plutonic Diorite; chemical composition roughly 52-63% silica (SiO2)

Chalcopyrite on Quartz

Copper Iron Sulfide (CuFeS2)

Milky Quartz

Silicon Dioxide (SiO2)

Lepidolite and Tiger's Eye

K(Li,Al)3(Si,Al)4O10(F,OH)2 (Lepidolite) / SiO2 (Quartz/Tiger's Eye)

Native Copper

Native Copper (Cu)

Gold Nugget

Native Gold (Au)

Tree Agate

Chalcedony (SiO2) with Dendritic inclusions

Granite

Felsic intrusive igneous rock

Pyrite

Iron Disulfide (FeS2)

Granite

Intrusive igneous rock

Granite

Intrusive Igneous Rock

Native Copper

Native Copper (Cu)

Pyrite

Iron Disulfide (FeS2)

Native gold in quartz matrix

Native gold (Au), with quartz (SiO₂) and possibly sulfide minerals

Granite Pebble

Phaneritic intrusive igneous rock

Cream Marble (Speckled)

Metamorphosed Limestone (mainly CaCO3)

Native copper nugget

Copper (Cu), often with cuprite or copper-oxide surface

Quartz Vein in Host Rock

Silicon Dioxide (SiO2) in matrix

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

Emerald in Matrix

Beryl (Be3Al2Si6O18) containing Chromium/Vanadium impurities

Milky Quartz

Silicon Dioxide (SiO2)

Quartzite

Metamorphic Quartz Sandstone

Black tourmaline (likely schorl), polished cabochon

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

Milky Quartz

Quartz (Silica / Silicon Dioxide - SiO2)

Polished moss agate pendant

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

Serpentinite

Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4

Rainbow Hematite / Magnetic Hematite

Iron oxide (Fe2O3) - often synthetic/coated for beads

Lepidolite

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

Granite Pebble

Granite

Beryl (Aquamarine)

Beryllium aluminum silicate (Be3Al2Si6O18)

Granite Boulder

Felsic Intrusive Igneous Rock