Anthropogenic Material (Man Made Sedimentary Mimic)

Coquina / Fossiliferous Limestone

Coquina (composed primarily of Calcium Carbonate / CaCO3)

Blue Chalcedony Cube

Silicon Dioxide (SiO2)

White Marble

Recrystallized Calcite Rock (CaCO3)

Green Aventurine

Quartz containing Fuchsite (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)

Chert (Jasper/Flint variety)

Microcrystalline Quartz (SiO2)

Red-orange sunstone (likely aventurine feldspar) bead bracelet

Feldspar, commonly oligoclase or labradorite with copper inclusions; composition varies by source

Druzy Quartz

Silicon Dioxide (SiO2)

Engraved purple stone cabochon, possibly amethyst

Unconfirmed; if amethyst, quartz (SiO₂)

Polished stromatolite (likely fossilized microbial mat)

Fossil stromatolite; chiefly microcrystalline quartz (SiO₂), commonly replacing carbonate

Flaked stone projectile point

Likely worked chert or fine-grained silicified shale; exact lithology cannot be confirmed from the image

Chert (potentially worked flint)

Cryptocrystalline microcrystalline quartz (SiO2)

Petrified Wood

Silicified Wood (SiO2)

Quartzite Arrowhead (Archaeological Lithic)

Recrystallized Quartz (SiO2)

Malachite

Malachite, Cu₂CO₃(OH)₂; a banded botryoidal copper carbonate specimen

Jasper

Silicon Dioxide (SiO2)

Banded Chalcedony (Agate)

Cryptocrystalline Quartz (SiO2)

Red Slag Glass (Cullet)

Amorphous Silicon Dioxide (SiO2) with metallic dopants

Carved yellow stone butterfly

Undetermined; possibly carved soapstone (talc-rich rock) or another soft ornamental stone

Yellow chalcedony (likely lemon agate or yellow jasper)

Microcrystalline quartz, SiO₂; possibly iron-bearing jasper or chrysoprase-like chalcedony

Pearl and Garnet Glass

Calcium Carbonate (CaCO3) for pearl; Silicon Dioxide (SiO2) for glass

Pink Granite

Phaneritic Felsic Igneous Rock (Granite)

Yellow chalcedony (likely polished/tumbled pieces)

Microcrystalline quartz, SiO₂; commonly called yellow jasper or silicified limestone depending on exact texture

Banded Sandstone

Arenite with Liesegang banding

Tumbled fossil shark tooth pendant

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

Petrified Wood (Silicified Wood)

Silicified Paleoflora (mainly Quartz, SiO2)

Chert Arrowhead

Cryptocrystalline microcrystalline Quartz (SiO2)

Bauxite

Bauxite (Al(OH)3, AlO(OH))

Gemstone ring (stones not reliably identifiable from the image)

Likely faceted yellow stones and clear stones set in a metal band; species and treatments are indeterminate visually

Diamond

Native Carbon (C)

Banded Calcite (often commercially sold as 'Mexican Onyx' or 'Honey Onyx')

Calcite (Calcium Carbonate, CaCO3)

Asphalt aggregate

Human-made bituminous asphalt containing crushed silicate rock aggregate

Chert / Flint

Silicon Dioxide (SiO2)

Diamond

Carbon (C)

Greenstone

Metabasalt / Metavolcanic rock

Tumbled chalcedony (likely moss or dendritic agate)

Microcrystalline quartz, SiO₂, with iron-oxide inclusions

Man-made Green Quartz (Lab-grown or Treated)

Silicon Dioxide (SiO2) with artificial coloration

Yellow faceted gemstone, likely citrine or yellow sapphire

Uncertain; probable quartz (SiO₂) or corundum (Al₂O₃)

Chalk

Micrite (primarily Calcium Carbonate, CaCO3)

Unidentified polished dark gemstone cabochon

Possibly hematite, obsidian, jet, or dark agate; image insufficient for a definitive identification

Chert (specifically Black Chert or Flint)

Cryptocrystalline Quartz (SiO2)

Banded Sandstone

Arenite with Liesegang banding (primarily SiO2 with FeO(OH) impurities)

Dark gneiss or migmatitic amphibolite

Band ed gneiss; composition likely quartz–feldspar–biotite/amphibole, possibly migmatite