Metal (Elemental Mineral)

Likely anthracite coal fragments

Anthracite; predominantly carbon (C), with minor mineral ash and sulfides

Green jade-like cabochon pendant

Possibly nephrite (fine-grained tremolite–actinolite); the photo alone cannot confirm the material

Blue aventurine or dyed blue quartzite pendant

Quartz (SiO₂), likely aventurine quartz/quartzite; exact identification requires testing

Lepidolite

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

Slag Glass

Amorphous Silica Glass (with metal oxide inclusions)

Vesicular basalt (scoria-like volcanic rock)

Vesicular basalt; predominantly plagioclase, pyroxene, and volcanic glass, with possible iron oxides

Amethyst

Silicon dioxide (SiO2) with iron impurities

Man-made Dyed Aura Quartz

Silicon Dioxide (SiO2) with metallic coating/dye

Blue chalcedony crystal pendant

Chalcedony, microcrystalline quartz (SiO₂), likely blue chalcedony or dyed quartz

Aura Quartz

Titanium-coated Silicon Dioxide (SiO2)

Pyrite and Quartz Agglomerate

Iron Sulfide (FeS2) with Silicon Dioxide (SiO2)

Smelter Slag

Anthropogenic Silicate Slag

Hypersthene

Hypersthene (Magnesium Iron Silicate - (Mg,Fe)SiO3)

Mystic Topaz

Aluminum silicate fluoride hydroxide with titanium coating (Al2SiO4(F,OH)2)

Granite

Intrusive Igneous Rock (composed primarily of quartz, alkali feldspar, and plagioclase)

Gold

Native Gold (Au)

Gold

Native Gold (Au)

White Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Rose Quartz

Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2)

Diamond

Carbon (C)

Copper ore-bearing rock (likely malachite/chrysocolla in a sulfide-rich matrix)

Cuprite–malachite/chrysocolla mineralization; probable copper sulfides such as chalcopyrite in altered host rock

Aquamarine cabochon ring

Aquamarine, blue variety of beryl (Be₃Al₂Si₆O₁₈)

Gold Nugget

Native Gold (Au)

Pyrite

Iron Sulfide (FeS2)

Gold Nugget

Native Gold (Au)

Silver (Jewelry Specimen)

Native Silver (Ag)

Goldstone (aventurine glass)

Man-made copper-bearing glass; not a natural mineral (commonly sold as blue/brown goldstone)

Opalite (Synthetic Opalized Glass)

Synthetic Silicon Dioxide (SiO2) glass

Iron-stained brecciated quartz vein rock

Quartz-rich hydrothermal breccia; predominantly SiO₂ with iron oxides/hydroxides (hematite, goethite) and likely minor host-rock minerals

Diamond ring

Diamond (crystalline carbon, C)

Diamond jewelry

Diamond (crystalline carbon, C)

Likely golden mica-bearing metamorphic rock

Micaceous schist, possibly biotite schist; composition commonly quartz + feldspar + biotite/phlogopite mica

Coarse-grained granite pegmatite

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

Aquamarine

Beryllium aluminum silicate (Be3Al2Si6O18)

Rutilated quartz (likely a cabochon set in metal)

Quartz, SiO₂, containing rutile inclusions (TiO₂)

Slag Glass

Vitreous Silicate Residue

Vesicular basalt (possible scoria)

Basaltic volcanic rock; chiefly plagioclase, pyroxene, and iron-rich minerals, with vesicles formed by trapped gas

Limonite/goethite-rich ironstone

Limonite (hydrated iron oxides, chiefly FeO(OH)·nH₂O), commonly mixed with goethite and hematite

Mixed small pebbles and mineral grains

Unidentified detrital sediment; likely quartz-, feldspar-, and lithic fragments

Green aventurine cabochon earrings

Aventurine quartz (SiO₂), likely green quartzite with fuchsite mica

Iron-stained quartz-rich rock, likely brecciated quartz vein

Quartz (SiO₂) with iron oxides/hydroxides, chiefly hematite and goethite; possibly limonite