Antropogenic (Man Made Glass Byproduct)

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Chert (Jasper/Flint variant)

Silicon Dioxide (SiO2)

Limestone

Calcium Carbonate (CaCO3)

Carved quartz skull, likely smoky quartz or gray chalcedony

Silicon dioxide (SiO₂), quartz or microcrystalline quartz

Chert (specifically Gray/Blue-Gray Chert)

Chert (SiO2)

Asphalt (Bituminous Concrete)

Bituminous Concrete / Pavement

Obsidian

Obsidian (volcanic glass, amorphous silica rich rock)

Chert (Iron-stained)

Microcrystalline or cryptocrystalline Quartz (SiO2)

Lapis lazuli and green-blue chalcedony jewelry

Lapis lazuli: lazurite-bearing metamorphic rock, chiefly lazurite (Na₃Ca(Al₃Si₃O₁₂)S) with calcite and pyrite; second stone: likely chrysoprase or green-blue chalcedony (microcrystalline quartz, SiO₂)

Chert (Flint)

Microcrystalline Quartz (SiO2)

Synthetic Costume Accessory (Non-Geological)

Polyester and Acrylic Fiber (Anthropogenic polymer)

Synthetic Marbled Aggregate (Footwear Component)

Ethylene-vinyl acetate (Croslite™)

Porcelain (Kaolin-based)

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

Chert (Jasper/Flint variant)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Goldstone

Avventurina (Cu + SiO2 glass)

Chert (specifically Yellow/Brown Chert or Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (Flint variety)

Chert (Microcrystalline or Cryptocrystalline Quartz), SiO2

Red Swirl Beads (Likely Resin or Glass, simulating Red Jasper or Agate)

N/A (for the beads as pictured); Red Jasper: SiO2 (Chert variety); Red Agate: SiO2 (Chalcedony variety)

Polished black stone egg, probably black obsidian

Obsidian, a natural volcanic glass; composition primarily silica-rich glass (approximately SiO₂), with variable iron and other trace elements

Flint / Chert

Microcrystalline Quartz (SiO2)

Titanium Coated Aura Quartz (Apple Aura Quartz)

Silicon Dioxide (SiO2) with Metallic Vapor Deposition Coating

Banded agate pendant (likely carnelian or brown-and-white chalcedony agate)

Agate, a banded variety of chalcedony; microcrystalline quartz, SiO₂, with iron-oxide coloration

Polished white chalcedony or milky quartz pebble

Chalcedony, microcrystalline quartz (SiO₂), possibly with iron-oxide staining or a minor mineral inclusion

Blue-dyed Quartz Druzy

Silicon Dioxide (SiO2) with artificial pigment

Chert (specifically White Chert or Novaculite)

Silicon Dioxide (SiO₂)

Flint

Silicon Dioxide (SiO2) - Chert variety

Carved quartz (likely rose quartz and green aventurine/quartz)

Quartz, silicon dioxide (SiO₂); green material may be aventurine quartz or serpentine

Chalcedony (or a variety of Chalcedony, likely Agate or Jasper)

Chalcedony (SiO₂)

Chert (and Flint)

Silicon Dioxide (SiO2)

Green Banded Chert (Agate/Jasper)

Silicon Dioxide (SiO2) with trace impurities of Chlorite or Glauconite

Chert (Jasper/Flint variety)

Microcrystalline quartz (SiO2)

Amethyst

SiO2 (Silicon Dioxide)

Asphalt Chunk (with aggregate)

Bituminous concrete / Anthropogenic conglomerate

Pearl-embellished decorative cross

Pearl (biogenic calcium carbonate, predominantly aragonite) with rhinestone-mounted glass or synthetic gemstones

Diamond Plate (Steel)

Alloyed Carbon Steel or Aluminum with 'Durbar' pattern

Green Aura Quartz (Titanium treated Kyanite or Quartz)

Silicon Dioxide (SiO2) or Aluminum Silicate (Al2SiO5) with Titanium/Metal Oxide coating

Granite (weathered pebble)

Granite (plutonic igneous rock)

Chert / Flint

Chert (varieties include Flint)

Synthetic Blue Aura Quartz

Silicon Dioxide (SiO2) with Metallic Infusion

Asphalt Concrete

Bituminous Concrete / Asphaltic Composite

Synthetic Costume Glove (Paws)

Polyethylene terephthalate (Polyester) & Polyurethane blend

Chert (or Flint)

Chert (a cryptocrystalline variety of quartz, SiO2)