Anthropogenic Material

Petrified Wood

Silicified Wood (primarily SiO2)

Brecciated Jasper or Agatized Dinosaur Bone

SiO2

Yellow Jasper

Silicon dioxide (microcrystalline quartz, SiO2)

Blue crystal pendant (likely blue glass or synthetic crystal)

Not identifiable from the image; possibly synthetic quartz or glass, rather than a natural mineral

Red coral beads (possibly dyed or imitation coral)

Corallium spp. skeleton, composed mainly of calcium carbonate (calcite); exact material cannot be confirmed from the image

Limestone Gravel

Sedimentary Calcium Carbonate (CaCO3)

Sandstone (Ferruginous)

Arenite (with Iron Oxide)

Weathered quartz-rich rock, likely feldspathic quartzite or quartz vein fragment

Quartzite dominated by quartz (SiO₂), with probable feldspar and iron-oxide staining

Tumbled dark stone, likely basalt

Basalt; primarily plagioclase feldspar, pyroxene, and commonly olivine

Schist

Schist; commonly mica schist, composed chiefly of muscovite/biotite mica with quartz and feldspar

Weathered quartzite cobble

Quartzite, composed predominantly of recrystallized quartz (SiO₂)

Mixed gravel and mineral fragments

Polymictic unconsolidated sediment; likely quartz, feldspar, chert, mica, and lithic fragments

Tumbled brown quartz crystal (likely smoky quartz or iron-stained quartz)

Quartz, silicon dioxide (SiO₂)

Kyanite blade

Kyanite, Al₂SiO₅

Polished red/purple tourmaline

Elbaite tourmaline, complex borosilicate: Na(Li,Al)₃Al₆(BO₃)₃Si₆O₁₈(OH)₄

Fossilized coral or silicified organic limestone

Likely fossil coral (Scleractinia/Tabulata) replaced or cemented by calcite and silica; exact identification requires close examination

Mixed tumbled gravel and quartz-rich sandstone

Primarily quartz (SiO₂), feldspar, and lithic sedimentary fragments; one piece appears to be quartz-rich sandstone

Conglomerate

Conglomerate Rock

Milky Quartz

Silicon Dioxide (SiO2)

Coquina

Bioclastic Limestone (Coquina)

Polished greenstone / serpentine (probable)

Serpentinite, dominated by serpentine-group minerals such as antigorite, lizardite, or chrysotile

Serpentine-rich metamorphic rock

Serpentinite; chiefly antigorite/lizardite/chrysotile, commonly with magnetite and carbonate

Zircon

Zirconium Silicate (ZrSiO₄)

Orbicular jasper

Orbicular jasper (microcrystalline quartz/chalcedony with iron-oxide and volcanic inclusions)

Likely slag-encrusted ironstone or a small mineralized rock fragment

Unidentifiable from the image; possibly iron-oxide-rich material (hematite/goethite) with adhering dark slag or debris

Petrified Wood

Silicified wood (SiO2)

Possible polished or tumbled stone

Unidentified; the image does not show enough detail to determine its composition

Crushed Limestone

Calcium Carbonate (CaCO3)

Crushed Stone Gravel

Crushed Limestone or Granite aggregate

Gravel and Sand Aggregate

Unconsolidated Clastic Sediment

Crushed Granite and Quartz Gravel

Composite Igneous and Silicate Rock Aggregate

Crushed Stone Ballast

Crushed Limestone or Granite Aggregate

Coal

Combustible sedimentary rock

Sand

Siliciclastic sediment / Quartz sand (SiO2)

Dragon Vein Agate (Dyed/Treated)

Agate (SiO2)

Small iron-rich pebble, possibly hematite/limonite

Hematite (Fe₂O₃) or goethite–limonite (FeO(OH)·nH₂O)

Tumbled yellow jasper (likely yellow calcite or serpentine)

Microcrystalline quartz, SiO₂, if jasper; appearance may also fit calcite, CaCO₃, or serpentine-group minerals

Tumbled green jasper (probable serpentine-rich stone)

Jasper, microcrystalline quartz (SiO₂), possibly mixed with serpentine or chlorite

Amethyst

Quartz (SiO₂), purple variety colored mainly by iron impurities and irradiation

Polished golden-brown cabochon, possibly amber

Unidentified; amber is fossilized resin (organic material), not a mineral

Iron Meteorite

Nickel-iron alloy (Kamacite and Taenite)

Chert / Flint

Microcrystalline quartz (SiO2)