Anthropogenic (Man Made Material Processed By Nature)

Porcelain (Kaolin-based)

Alumina silicate ceramic (composed primarily of Kaolinite: Al2Si2O5(OH)4)

Synthetic Costume Glove (Paws)

Polyethylene terephthalate (Polyester) & Polyurethane blend

Green Glass (often marketed as 'Obsidian' or 'Green Quartz')

Amorphous Silica (SiO2) with copper or chromium additives

Obsidian Arrowhead

Obsidian (Volcanic Glass)

Coquina Limestone

Coquina (Biogenic Limestone)

Gypsum (Wallboard/Drywall)

Calcium Sulfate Dihydrate (CaSO4·2H2O)

Tumbled milky quartz

Quartz (silicon dioxide, SiO₂)

Chert (often called Flint in archaeological contexts)

Microcrystalline or cryptocrystalline Silica (SiO2)

Dark blue polished stone pendant

Indeterminate; possibly sodalite, lapis lazuli, or blue slag/glass-like material

Opalite

Synthetic Opalised Glass

Chert / Flint

Microcrystalline Quartz (SiO2)

Pink Granite

Phaneritic Felsic Intrusive Igneous Rock

Green glass-like cabochon, likely synthetic glass or resin

Unidentified green transparent material; possibly molded glass, synthetic spinel, or resin

Red Sandstone

Arenite (primarily Quartz with Hematite cement)

Tumbled pink feldspar (likely moonstone or orthoclase)

Potassium feldspar, chiefly orthoclase (KAlSi₃O₈); possibly adularescent moonstone

Terrazzo (with Marble and Granite fragments)

Cementitious or resinous composite containing Calcium Carbonate (CaCO3) and Silicates

Blue glassy tumbled stone, likely blue chalcedony or slag glass

Chalcedony (microcrystalline SiO₂), possibly man-made blue glass

Chrysocolla-bearing copper ore

Chrysocolla (hydrated copper aluminum silicate), likely with malachite/azurite and copper sulfides

Mica Schist with Garnet

Garnetiferous Mica Schist

Sandstone (Pebble)

Sandstone (arenite, arkose, wacke depending on composition)

Green cabochon gemstone pendant, likely turquoise or dyed green turquoise

Probably turquoise, CuAl₆(PO₄)₄(OH)₈·4H₂O; exact identification requires testing

Green glassy slag (often sold as “sea glass” or “green obsidian”)

Industrial vitreous slag; primarily amorphous silicate glass, composition variable

Cubic Zirconia (CZ) Jewelry

Zirconium dioxide (ZrO2)

Iron-rich slag or weathered ironstone fragments

Probably hematite–goethite material; possibly industrial iron slag (Fe₂O₃/FeO(OH))

Likely clear quartz crystal or glass-like gemstone

Quartz, silicon dioxide (SiO₂); exact identification is uncertain from the strongly magenta-lit image

Likely tumbled epidote-bearing rock or green jasper

Epidote-group silicate, possibly in a jasper or serpentinite matrix

Chert (Arrowhead/Projectile Point)

Microcrystalline quartz (SiO2)

Carved lavender chalcedony (likely agate) animal figurine

Microcrystalline quartz, SiO₂; probable chalcedony or pale lavender agate

Polished green-and-black banded cabochon (likely malachite imitation or dyed agate)

Uncertain; possible malachite (Cu₂CO₃(OH)₂), banded agate (SiO₂), or man-made glass

Fossil shell fragment

Indeterminate molluscan bioclast, likely aragonite or calcite

Tumbled chalcedony (likely milky quartz)

Microcrystalline quartz, SiO₂; possibly pale agate or quartzite

Pearl

Pearl (Calcium Carbonate with organic conchiolin, CaCO3)

Gold-bearing quartz or ironstone fragment

Quartz (SiO₂) with possible native gold and iron oxides

Sea Glass

Amorphous Silica (Anthropogenic glass) - SiO2

Goldstone (Synthetic Aventurescence Glass)

Cuprous Aventurescent Glass (Silicon Dioxide with Copper inclusions)

Dyed Agate

Silicon Dioxide (SiO2) - variety Chalcedony

Chert (Arrowhead Artifact)

Microcrystalline Quartz (SiO2)

Raw quartz crystal

Quartz (silicon dioxide, SiO₂), likely milky or included quartz

Goldstone (Red/Brown)

Aventurine Glass (SiO2 with Copper inclusions)

Malaysian 50 Sen Coin

Coinage (specific alloy unknown without metallurgical analysis, but typically brass or bronze for this denomination and era)

Chert

Microcrystalline quartz (SiO2)

Small clear crystal, possibly quartz or glass-like gemstone

Uncertain; likely quartz (SiO₂), but the image is insufficient to exclude man-made glass or cubic zirconia