Mineral (Processed Alloy)

Native Copper (in coinage alloy)

Copper (Cu)

Hematite cameo or hematine imitation

Hematite (Fe₂O₃); possibly synthetic hematine or black glass

Tumbled black-and-white stone, likely dendritic agate or jasper

Cryptocrystalline quartz (SiO₂), possibly chalcedony with manganese-oxide dendrites

Gold-bearing quartz or ironstone fragment

Quartz (SiO₂) with possible native gold and iron oxides

Tumbled red jasper

Jasper, microcrystalline quartz (SiO₂) colored mainly by iron oxides

Blue-dyed magnesite beads (often sold as “turquoise howlite”)

Magnesite, MgCO₃; commonly dyed blue and possibly marketed as dyed howlite, Ca₂B₅SiO₉(OH)₅

Beaded mineral/crystal jewelry (likely turquoise and coral accents)

Variable; blue beads may be turquoise (CuAl6(PO4)4(OH)8·4H2O), with possible dyed howlite, glass, or composite materials

Small metallic sulfide fragment, possibly pyrite-bearing ore

Likely pyrite (iron disulfide, FeS₂), though the image is insufficient for definitive identification

Mixed mineral and rock specimen collection

Assorted silicates, carbonates, oxides, and sulfides; individual species cannot be reliably identified from this image

Granite

Intrusive Felsic Igneous Rock

Tumbled tiger’s eye

Tiger’s eye (chatoyant quartz), SiO₂, typically pseudomorphic quartz after crocidolite

Polished red jasper beads

Jasper, an opaque microcrystalline variety of quartz (SiO₂), commonly colored by iron oxides

Beryl (Aquamarine variety)

Beryllium Aluminum Cyclosilicate (Be3Al2Si6O18)

Native Copper

Native Copper (Cu)

Possible industrial slag or basaltic volcanic glass

Likely iron-rich vitreous slag; natural alternative: basaltic glass (tachylite)

Polished blue stone, likely sodalite or dyed quartz

Possibly sodalite (Na₈Al₆Si₆O₂₄Cl₂) or artificially dyed quartz/chalcedony; image alone is inconclusive

Asphalt aggregate

Human-made bituminous asphalt containing crushed silicate rock aggregate

Quartz crystal pendant (likely smoky quartz or iron-stained quartz)

Quartz, silicon dioxide (SiO₂)

Tumbled amethyst

Quartz, SiO₂; purple coloration from iron-related defects and irradiation

Black tourmaline beads (likely schorl)

Schorl, NaFe₃Al₆(BO₃)₃Si₆O₁₈(OH)₄

Tumbled and polished quartz crystal points

Quartz (silicon dioxide, SiO₂), chiefly rock crystal with smoky or included varieties

Lapis lazuli bead bracelet

Lazurite-bearing calcite–pyrite rock; lazurite formula (Na,Ca)₈(AlSiO₄)₆(S,SO)₂

Milky Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

South Korean 100 Won Coin (Cupronickel)

Cupronickel Alloy (75% Cu, 25% Ni)

Likely polished greenstone or serpentine inlay

Serpentine-group mineral, commonly antigorite/lizardite; possibly nephrite jade

Granite

Granite (interlocking crystals of quartz, feldspar, and mica)

Asphalt aggregate pavement

Bituminous asphalt concrete containing crushed stone aggregate

Polished banded calcite (often sold as “onyx marble” or Mexican onyx)

Banded calcite; predominantly CaCO₃, usually microcrystalline to fibrous calcite

Carved quartz (likely rose quartz and green aventurine/quartz)

Quartz, silicon dioxide (SiO₂); green material may be aventurine quartz or serpentine

Gold

Aurum (Elemental Gold, Au)

Gold and Silver (Metal Components of an Antique Pocket Watch)

Native Gold (Au) and Native Silver (Ag)

Amethyst ring

Amethyst, purple quartz (SiO₂), likely set with diamond or other accent stones

White quartz bead strand (likely milky quartz)

Quartz, silicon dioxide (SiO₂), crystalline silica

Green tourmaline (likely chrome/dravite tourmaline crystals)

Tourmaline-group cyclosilicate; commonly elbaite, dravite, or chromdravite, complex borosilicate formula

Faceted diamond gemstone (likely)

Diamond — crystalline carbon, C

Nickel coin (U.S. currency)

Cupronickel (75% Copper, 25% Nickel alloy)

Gold-bearing sulfide ore (tentative)

Native gold, likely with pyrite/chalcopyrite in quartz or altered rock

Tumbled Hematite with Quartz/Chert (Specular Hematite)

Fe2O3 (Iron Oxide)

Amber Inlay Jewelry

Fossilized Resin (C10H16O)

Magnetite (lodestone), possibly meteoritic iron

Magnetite, Fe₃O₄; exact identification is uncertain from the image alone

Native copper nugget

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

Raw pale-green beryl (likely aquamarine)

Beryl, Be₃Al₂Si₆O₁₈; blue-green variety is aquamarine