Anthropogenic (Human Made) Sedimentary Like Material

Chert (varieties include Flint and Mudstone)

Microcrystalline Silica (SiO2)

Chert / Flint

Microcrystalline Quartz (SiO2)

Slag (Industrial Byproduct)

Anthropogenic Vitreous Silicate material

Chert Arrowhead

Microcrystalline Quartz (SiO2)

Orange glassy slag (industrial by-product)

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

Cullet (Slag Glass)

Amorphous Silica (SiO2) with various metal oxide colorants

Decorated turquoise-like bead or mineral pendant

Likely turquoise [CuAl₆(PO₄)₄(OH)₈·4H₂O], possibly dyed composite or blue-green jasper

Agate and millefiori glass jewelry

Agate: microcrystalline quartz (SiO₂); millefiori element appears to be man-made glass

Tumbled gray stone, likely quartz-rich pebble

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

Slag

Anthropogenic Vitrification Product / Silicate Slag

Artisanal Glass Beads (Simulated Goldstone or Aventurine Glass)

Silicon Dioxide (SiO2) with metallic inclusions

Chert (Arrowheads)

Microcrystalline Quartz (SiO2)

Slag Glass / Industrial Slag

Anthropogenic Glass

Beaded gemstone bracelet

Indeterminate; likely small polished mineral beads, possibly turquoise or dyed stone, with metal and glass components

Chert (Flint / Jasper)

Silicon Dioxide (SiO2)

Unknown dark mineral/rock fragment

Indeterminate; possibly a dark sulfide mineral or slag-like geological fragment

Chert (and Jasper/Chalcedony mixture)

Microcrystalline Quartz (SiO2)

Amber cabochon pendant

Amber (fossilized plant resin), chiefly polymerized diterpenoid resin

Ferrochrome Slag

Anthropogenic slag (Fe-Cr alloy waste)

Carved yellow stone butterfly

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

Carnelian cabochon pendant

Carnelian, orange-red chalcedony (microcrystalline quartz, SiO₂)

Chert (Flint)

Chert (Microcrystalline Quartz, SiO2)

Chert (specifically White Chert or Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (Flint)

Chert (Microcrystalline or cryptocrystalline Quartz - SiO2)

Chert (Jasper/Flint variety)

Microcrystalline Quartz (SiO2)

Blue Slag Glass

Man-made Silicon Dioxide (Amorphous)

White cabochon gemstone, likely milky chalcedony or opalite

Chalcedony: microcrystalline quartz, SiO₂; appearance may also indicate synthetic opalite glass

Engraved purple stone cabochon, possibly amethyst

Unconfirmed; if amethyst, quartz (SiO₂)

Asphalt Concrete (Bituminous Pavement)

Aggregates in Bitumen Matrix

Mixed beach-stone and tumbled-glass collection

Predominantly uncertain rocks (likely basalt, granite, and quartz-bearing stones) with anthropogenic glass; one possible banded agate or jasper

Polished banded jasper (likely red jasper)

Microcrystalline quartz/chalcedony, SiO₂, colored by iron oxides; exact variety uncertain

Goldstone (Brown/Gold)

Aventurine Glass (Man-made glass with Copper inclusions)

Yellow faceted gemstone, likely citrine or yellow sapphire

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

Red agate bead (likely dyed or treated)

Agate, a microcrystalline variety of quartz; SiO₂

Faceted glass-like gemstone object

Likely synthetic glass or cubic zirconia; exact material cannot be confirmed from the image

Flint / Chert Pebble

Microcrystalline Quartz (SiO2)

Chert (Jasper variety)

Microcrystalline Quartz (SiO2)

N/A - Image does not contain a rock or mineral

Anthropogenic textile material

Chalcedony (likely blue agate) knapped into an arrowhead

Microcrystalline quartz, SiO₂ (chalcedony)

Coquina

Bioclastic Limestone

Possible basalt or iron-rich slag

Basalt (tentative; identification uncertain from image)

Chert (or Flint)

Chert (a cryptocrystalline variety of quartz, SiO2)