Mineral, Metal (Element)

Slag Glass

Silicon dioxide with impurities

Rhyolite

Extrusive igneous rock (felsic)

Fluorite

Calcium Fluoride (CaF2)

Lepidolite

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

Gold Ore (Auriferous Quartz with Chalcopyrite/Pyrite)

Au (Native Gold) in Quartz (SiO2) with FeS2 (Pyrite) or CuFeS2 (Chalcopyrite)

Pegmatitic mica-quartz-feldspar specimen

Granitic pegmatite, chiefly quartz (SiO₂), feldspar, and muscovite/biotite mica

Gold

Native Gold (Au)

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

Beryl (likely Aquamarine or Green Beryl)

Beryllium aluminum silicate (Be3Al2Si6O18)

Metal Alloy (Jewelry)

Not a naturally occurring rock or mineral; likely a metal alloy for jewelry. Possible compositions include sterling silver (92.5% silver, 7.5% copper), or other silver/gold alloys.

Raw Topaz (or Smoky Quartz)

Al2SiO4(F,OH)2 / Silicon Dioxide (SiO2)

Gold Nugget

Native Gold (Au)

Raw fluorite-bearing rock, possibly fluorite in quartz/calcite matrix

Fluorite (CaF₂), with likely quartz (SiO₂) and/or calcite (CaCO₃) gangue

Arfvedsonite in Matrix

Arfvedsonite [Na3(Fe2+)4Fe3+Si8O22(OH)2]

Diamond (in jewelry)

Carbon (C)

Gold Nugget

Native Gold (Au)

Metal Alloy (Likely Pewter or Sterling Silver)

Not a natural geological specimen; composed of refined metals. If pewter, it's a tin-based alloy. If sterling silver, it's 92.5% silver and 7.5% other metals (usually copper).

Bauxite

Bauxite (mixture of Hydrous Aluminum Oxides)

Aura Quartz

Silicon Dioxide (SiO2) with metallic vapor coating

Pyrite

Iron Sulfide (FeS2)

Gold Nugget

Native Gold (Au)

Lepidolite with Tourmaline in Quartz Matrix

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

Fossilized Bone Fragment

Permineralized Skeletal Element (Likely Vertebrate)

Green Fluorite

Calcium Fluoride (CaF2)

Quartz and Limestone Grouping

Silicon Dioxide (SiO2) / Calcium Carbonate (CaCO3)

Quartz-rich pegmatite (likely feldspar–quartz rock)

Granitic pegmatite; chiefly quartz (SiO₂) and feldspar, with minor mica and dark accessory minerals

Gold Nugget / Gold Flakes

Native Gold (Au)

Opalite

Synthetic Glass / Man-made Opal Simulant

Native Silver

Silver (elemental Ag)

Quartz Vein

Silicon Dioxide (SiO2)

Quartz-bearing Ore (likely Gold-bearing Quartz)

Quartz (SiO2) with potential sulfide mineralization (Pyrite/Arsenopyrite)

Celestite (Celestine)

Strontium sulfate (SrSO4)

Lepidolite

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

Lepidolite

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

Quartz Vein in Basalt or Mafic Rock

Silicon Dioxide (SiO2) vein in volcanic/mafic matrix

Bismuth Crystal

Bismuth (Bi)

Bauxite

Bauxite (mixture of hydrous aluminum oxides: Al(OH)3 & AlO(OH))

Tumbled pink-orange feldspar

Microcline or orthoclase feldspar, KAlSi₃O₈ (tentative)

Quartz-rich pegmatitic rock (likely quartz–feldspar–mica specimen)

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

Mixed gemstone jewelry collection

Likely amethyst, rose quartz or pink tourmaline, smoky quartz, and dark tourmaline/onyx; exact identifications are uncertain from the image

Ironstone Pebble

Sedimentary ironstone / Hematitic Sandstone

Blue lace agate (tumbled)

Microcrystalline quartz, SiO₂ (chalcedony variety)