Man Made Material (Anthro Lithic Product)

Tumbled milky quartz

Quartz, silicon dioxide (SiO₂)

Tumbled gray stone, likely quartz-rich pebble

Probable microcrystalline quartz/chalcedony (SiO₂), possibly gray jasper or quartzite

Blue Slag Glass

Amorphous Silica (Byproduct of smelting)

Note: This is a Man-Made Object (Costume/Prop Patch)

Synthetic fiber and pigments (Cellulose/Plastic-based composite)

Cullet Glass (Slag Glass)

Amorphous Silicon Dioxide (Industrial byproduct)

Sea Glass

Man-made vitreous material (silica-based glass)

Small pebble, likely limestone

Unidentified carbonate pebble, possibly micritic limestone (calcite, CaCO₃)

Blue glassy gemstone cabochon, likely dyed chalcedony or glass

Uncertain; possible dyed chalcedony (microcrystalline quartz, SiO₂)

Opalite

Synthetic Glass (Hydrated Silica Simulant)

Likely clear quartz pebble or glassy quartz fragment

Quartz (silicon dioxide, SiO₂)

Strawberry Quartz

Silicon Dioxide (SiO2) with Hematite or Goethite inclusions

Mother of Pearl (Nacre)

Aragonite (CaCO3) with Organic Matrix

Ferrous Slag

Iron/Steel Slag (Complex Calcium-Alumino-Silicates)

Opalite

Man-made Synthetic Glass (Silicon Dioxide with metal additives)

Clear quartz fragment

Quartz (silicon dioxide, SiO₂)

Diamond (or Simulant)

Carbon (C)

Conglomeratic concrete or asphalt aggregate surface with dark bituminous chunks

Polymictic gravel aggregate; dark pieces likely bitumen/asphalt, not a natural rock

Blue-green cabochon, likely chalcedony or treated glass imitation

Cryptocrystalline quartz (chalcedony/possibly chrysoprase); identification uncertain from image

Goldstone (Brown/Gold)

Aventurine Glass (Man-made glass with Copper inclusions)

Fossiliferous limestone with colonial coral

Calcite (CaCO₃) limestone containing fossil tabulate or rugose coral colonies

Bouncy Ball (Synthetic Rubber Polymer)

Polybutadiene / Ethylene Vinyl Acetate (EVA)

Malachite

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

Sea Glass

Silicon dioxide (mostly)

Concrete with Aggregate

Composite construction material; primary matrix is Calcium Silicate Hydrate (C-S-H)

Polished garnet bead bracelet

Garnet group, likely almandine–pyrope solid solution; commonly approximated as Fe₃Al₂(SiO₄)₃–Mg₃Al₂(SiO₄)₃

Painted River Rock

Artificially Coated Sedimentary Rock

Quartz pebble (Quartztite fragment)

Silicon Dioxide (SiO2)

Sandstone (with concrete/human-made layer)

Clastic Sedimentary Rock (primarily Quartz/Feldspar grains)

Concrete

Anthropogenic Sedimentary Rock (Hydrated Calcium Silicate)

Tumbled clear quartz (rock crystal)

Quartz, silicon dioxide (SiO₂)

Tumbled milky quartz pebble

Quartz (silicon dioxide, SiO₂), likely milky quartz

Asphalt Chunk

Asphalt concrete

Stainless Steel (Polished)

Ferrous Alloy containing Iron (Fe), Chromium (Cr), and Carbon (C)

Orange glassy slag (industrial by-product)

Iron-rich silicate glass; composition varies, commonly Fe–Ca–Al silicate

Likely tumbled or cut quartz/chalcedony fragment

Silicon dioxide (SiO₂), probably microcrystalline quartz or quartz

Blue opalite glass (likely man-made)

Opalite glass; a silica-based amorphous glass, not natural opal

Flint / Chert Pebble

Microcrystalline Quartz (SiO2)

Polished labradorite sphere

Labradorite, calcic plagioclase feldspar ((Ca,Na)(Al,Si)₄O₈)

Citrine Quartz

Citrine (Silicon Dioxide, SiO2)

Slag

Anthropogenic Vitrification Product / Silicate Slag

Opalite

Man-made Opalized Glass (Synthetic Glass)

Slag (Industrial Glass/Glassy Rock)

Anthropogenic Vitreous Material