Man Made Material (Metal)

Galena-bearing ore (probable)

Galena, lead sulfide (PbS), possibly with sphalerite or metallic sulfides

Small brown mineral/rock fragment

Indeterminate; possibly weathered quartz-rich rock, ironstone, or a sulfide mineral

Pink Granite

Phaneritic Felsic Igneous Rock (Granite)

Bauxite

Aluminium ore / Hydrated aluminium oxides (AlOx(OH)3-2x)

Chert

Microcrystalline Quartz (SiO2)

Cut diamond tennis-chain jewelry

Diamond, crystalline carbon (C), cubic crystal system

Likely weathered metallic mineral or slag fragment

Indeterminate; possibly iron-rich sulfide/oxide material or industrial slag

Serpentinite

Serpentinite (Hydrated magnesium iron phyllosilicate)

Ferrochrome Slag

Calcium-Aluminium-Magnesium Silicate Slag

Turquoise-colored ring stone (possibly turquoise or imitation)

Turquoise, CuAl₆(PO₄)₄(OH)₈·4H₂O; identity cannot be confirmed from the image

Polished moss agate pendant

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

Tumbled fossil shark tooth pendant

Likely fossilized shark tooth, possibly Otodus or Carcharhinus; exact species cannot be confirmed from the image

Bull Quartz (White Quartz)

Silicon Dioxide (SiO2)

Polished dark chalcedony or agate cabochon

Cryptocrystalline quartz, SiO₂; likely brown-red chalcedony/agate

Slag Glass (Cullet Glass)

Amorphous Silica (Industrial byproduct)

Red cabochon gemstone, likely carnelian or red agate

Cryptocrystalline quartz (chalcedony), SiO₂

Limonite (Iron Ore)

Limonite (FeO(OH)·nH2O)

Biotite-rich schist

Mica schist, chiefly quartz + biotite mica (locally muscovite); composition varies

Iron-stained brecciated quartz vein rock

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

White cabochon gemstone, likely agate or chalcedony

Cryptocrystalline quartz (SiO₂), probably chalcedony/agate; exact identification is uncertain from the overexposed image

Peridot (Olivine)

Magnesium Iron Silicate (Mg, Fe)2SiO4

Quartzite Pebble

Quartzite (SiO2)

Serpentine

Hydrous magnesium iron silicate, (Mg,Fe)3Si2O5(OH)4

Carved translucent jade pendant

Likely nephrite jade (actinolite–tremolite series); possibly jadeite or chalcedony, identification requires testing

Serpentinite

Serpentinite (Mg, Fe, Ni)3Si2O5(OH)4

Black rectangular gemstone pendant, likely obsidian or black glass imitation

Most plausibly black obsidian (volcanic glass; SiO₂-rich), though the image cannot exclude synthetic glass or black onyx

Likely black cabochon gemstone pendant

Uncertain; possibly black star sapphire, black spinel, or obsidian

Gemstone-set silver jewelry piece

Likely mixed faceted gemstones in a silver-colored metal setting; stones may include sapphire, ruby/garnet, and yellow sapphire or citrine, but the image is insufficient for species-level identification.

Goldstone

Not a natural mineral or rock. It is an ornamental glass.

Chert / Flint

Cryptocrystalline Quartz (SiO2)

Granite Boulder

Felsic Intrusive Igneous Rock

Diamond

Carbon (C)

Greenstone

Metabasalt / Metavolcanic rock

Chert (Yellow Jasper/Flint)

Silicon Dioxide (SiO2)

Tumbled chalcedony (likely moss or dendritic agate)

Microcrystalline quartz, SiO₂, with iron-oxide inclusions

Chert (Flint)

Silicon Dioxide (SiO2)

Chert

Chert (SiO2)

Chert (Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Weathered concrete or cementitious slab (not natural rock)

Artificial calcium-silicate cement composite; likely Portland cement concrete

Likely polished dark gemstone cabochon

Indeterminate; possibly black chalcedony/agate, obsidian, or glass imitation

Iron-stained quartz-bearing rock

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

Diamond (Cut jewelry specimen)

Diamond (pure Carbon, C)