Man Made Material (Metal)

Yellow chalcedony (possibly iron-stained agate)

Microcrystalline quartz, SiO₂

Nugget of Native Silver

Native Silver (Ag)

Stony Meteorite (Chondrite)

Ordinary Chondrite (L or H type)

Brecciated jasper

Jasper, an opaque microcrystalline variety of quartz (SiO₂), with iron-oxide staining

Polished dark chalcedony or agate cabochon

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

Slag Glass (Cullet Glass)

Amorphous Silica (Industrial byproduct)

Chert (specifically Flint Arrowhead)

Silicon dioxide (SiO2) - Microcrystalline Quartz

Lapis lazuli bead bracelet

Lapis lazuli: a rock composed mainly of lazurite, with variable calcite and pyrite

Turquoise-colored ring stone (possibly turquoise or imitation)

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

Turquoise-colored bead necklace (likely dyed howlite or magnesite)

Likely dyed Ca₂B₅SiO₉(OH)₅ (howlite) or MgCO₃ (magnesite); turquoise is CuAl₆(PO₄)₄(OH)₈·4H₂O

Galena-bearing ore (probable)

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

Pink coral and green-stone jewelry

Likely pink coral (calcium carbonate, CaCO₃) set with an unidentified green stone; the image is too indistinct to identify the green material reliably.

Slag

Anthropogenic silicate slag

Rounded gray pebble, likely quartzite

Quartzite (predominantly crystalline quartz, SiO₂); identification is tentative from the image

Blue-green agate bead bracelet

Chalcedony (microcrystalline quartz, SiO₂), likely dyed blue-green

Bauxite

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

Chert

Microcrystalline Quartz (SiO2)

Small brown mineral/rock fragment

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

Limonite (Iron Ore)

Limonite (FeO(OH)·nH2O)

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

Weathered concrete or cementitious slab (not natural rock)

Artificial calcium-silicate cement composite; likely Portland cement concrete

Polished moss agate pendant

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

Coquina

Biogenic Limestone (mostly Calcium Carbonate, CaCO3)

Cut diamond tennis-chain jewelry

Diamond, crystalline carbon (C), cubic crystal system

Peridot (Olivine)

Magnesium Iron Silicate (Mg, Fe)2SiO4

Quartzite Pebble

Quartzite (SiO2)

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)

Likely weathered metallic mineral or slag fragment

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

Bull Quartz (White Quartz)

Silicon Dioxide (SiO2)

Serpentine

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

Serpentinite

Serpentinite (Hydrated magnesium iron phyllosilicate)

Chert / Flint

Cryptocrystalline Quartz (SiO2)

Biotite-rich schist

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

Pink Granite

Phaneritic Felsic Igneous Rock (Granite)

Beryl

Beryllium Aluminum Silicate (Be3Al2(SiO3)6)

White cabochon gemstone, likely agate or chalcedony

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