Antropogenic (Man Made Material)

Blue glassy gemstone cabochon, likely dyed chalcedony or glass

Uncertain; possible dyed chalcedony (microcrystalline quartz, SiO₂)

Asphalt Chunk (Bituminous Concrete)

Aggregated Bitumen / Artificial Breccia

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

Iron-rich slag or ironstone; appearance is not diagnostic

Likely iron-oxide-rich material (hematite, Fe₂O₃, and/or magnetite, Fe₃O₄); possibly smelting slag

Hematite

Iron(III) oxide (Fe2O3)

Mother of Pearl (Nacre)

Aragonite (CaCO3) with Organic Matrix

Ferrous Slag

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

Clear quartz fragment

Quartz (silicon dioxide, SiO₂)

Diamond (or Simulant)

Carbon (C)

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

Synthetic Resin / Plastic Figurine

Synthetic Polymer (Copolymer of Polyethylene or Resin)

Bouncy Ball (Synthetic Rubber Polymer)

Polybutadiene / Ethylene Vinyl Acetate (EVA)

Cultured Marble (Synthetic)

Polymer-matrix composite (typically calcium carbonate in polyester resin)

Sea Glass

Silicon dioxide (mostly)

Concrete with Aggregate

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

Concrete

Anthropogenic Sedimentary Rock (Hydrated Calcium Silicate)

Blue Slag Glass

Amorphous Silica (Byproduct of smelting)

Quartz pebble (Quartztite fragment)

Silicon Dioxide (SiO2)

Sandstone (with concrete/human-made layer)

Clastic Sedimentary Rock (primarily Quartz/Feldspar grains)

Ceramic or Polished Stone Heart (Anthropogenic Material)

Glazed Ceramic (Silicon Dioxide based coating on Alumina Silicate body) or Polished Limestone/Marble (Calcium Carbonate, CaCO3)

Tumbled clear quartz (rock crystal)

Quartz, silicon dioxide (SiO₂)

Tumbled milky quartz pebble

Quartz (silicon dioxide, SiO₂), likely milky quartz

Asphalt Chunk

Asphalt concrete

Likely tumbled or cut quartz/chalcedony fragment

Silicon dioxide (SiO₂), probably microcrystalline quartz or quartz

Opalite

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

Blue opalite glass (likely man-made)

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

Polished labradorite sphere

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

Citrine Quartz

Citrine (Silicon Dioxide, SiO2)

Opalite

Man-made Opalized Glass (Synthetic Glass)

Opalite (likely man-made opalescent glass)

Opalite; not a true mineral, typically synthetic opalescent glass (silica-based)

Diamond / Clear Quartz / Glass paste

Carbon (Diamond) / Silicon Dioxide (Quartz)

Goldstone

Aventurine glass (Synthetic glass with copper inclusions)

Polished brown jasper (likely brecciated or orbicular jasper)

Microcrystalline quartz/chalcedony, SiO₂, with iron-oxide and other mineral inclusions

Cherry Quartz with Rose Quartz

Crystalline Quartz (SiO2) with glass-based synthetic components

Goldstone

Aventurine Glass (Man-made glass with copper inclusions)

Man-made Synthetic Material (Plastic/Composite)

Acrylonitrile Butadiene Styrene (ABS) or High-Impact Polystyrene (HIPS)

Aura Quartz

Titanium-coated Silicon Dioxide (SiO2)

Iron Slag (Industrial Byproduct)

Anthropogenic Vitrification Product/Ferrous Slag