Man Made Material (Anthro Lithic Product)

Terracotta (Man-made ceramic brick fragment)

Baked clay / High-iron ceramic (Silicate-based ceramic)

Chert

Microcrystalline quartz (SiO2)

Weathered iron-rich sandstone or lateritic rock

Quartz-rich sandstone with iron-oxide cement; possibly ferruginous laterite

Metal Chain (Likely Steel or a Steel Alloy)

Steel (primarily iron and carbon); specific alloy unknown

Chert (Jasper-like Silicate)

Silicon Dioxide (SiO2)

Graywacke

Lithic Sandstone (Graywacke)

Quartz (worked as a tool or artifact)

Silicon Dioxide (SiO2)

Likely clear quartz crystal or glass-like gemstone

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

Blue Apatite

Apatite (Calcium Phosphate) - Ca5(PO4)3(F,Cl,OH)

Colorless faceted quartz-like gemstone

Likely quartz (SiO₂), though the appearance may also indicate man-made glass or cubic zirconia

Hematite

Iron(III) oxide, Fe2O3

Goldstone (Red/Brown)

Aventurine Glass (SiO2 with Copper inclusions)

Aventurine

Quartz containing inclusions of Fuchsite (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)

Chert (often called Flint when dark or worked)

Cryptocrystalline silica (SiO2)

Rainbow Hematite (Man-made/Treated)

Tumbled Hematite with Titanium/Anodized coating (Iron(III) oxide, Fe2O3)

Man-made Blank Ammunition (Brass)

CuZn (Cartridge Brass - roughly 70% Copper, 30% Zinc)

Green Agate

Silicon dioxide (SiO₂)

Artisanal Glass Beads (Simulated Goldstone or Aventurine Glass)

Silicon Dioxide (SiO2) with metallic inclusions

Rounded yellow-brown pebble

Likely iron-stained sandstone or quartz-rich river cobble

Man-made Slag (Industrial Byproduct)

Anthropogenic Glassy Residue

Man-made Dyed Aura Quartz

Silicon Dioxide (SiO2) with metallic coating/dye

Slag Glass (Leland Blue variant)

Anthropogenic Vitreous Silicate

Chert (and Flint)

Silicon dioxide (SiO2) - Microcrystalline quartz

Tumbled black obsidian (likely)

Volcanic glass; chiefly silica-rich rhyolitic glass (SiO₂)

Milky quartz

Quartz (silicon dioxide, SiO₂)

Chert Arrowhead

Microcrystalline Quartz (SiO2)

Blue glassy fragment among beach gravel

Likely cobalt-blue man-made glass; not a natural mineral specimen

Opalite

Man-made synthetic glass with opalescent effects (SiO2 + metal oxides)

Chert / Chalcedony

Microcrystalline Quartz (SiO2)

Green Sea Glass

Amorphous Silica (man-made glass), SiO2 + additive metal oxides

Greenstone / Epidosite

Epidosite (Metasomatic rock consisting mainly of Epidite Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH) and Quartz)

Cobalt Blue Slag Glass

Amorphous Silicon Dioxide (anthropogenic) with Cobalt additives

Granite

Phaneritic Igneous Rock (primarily SiO2, Al2O3, K2O, Na2O)

Libyan Desert Glass

Impact-melt silica glass (SiO2 + traces of Al, Fe, Ti)

Red cabochon gemstone ring (likely glass or synthetic stone)

Undetermined; the image does not establish a natural mineral identity

Chert (specifically Flint or Jasper variant)

Microcrystalline Quartz (SiO2)

Chert (Agatized/Banded)

Chert (Microcrystalline Silicon Dioxide, SiO2)

Chert (likely flint)

Microcrystalline quartz, SiO₂

Rhyolitic Tuff

Rhyolitic Tuff / Pyroclastic rock

Sandstone

Quartz arenite / Lithic sandstone

Asphalt Pavement (with aggregate)

Asphalt concrete

Weathered iron-rich rock, possibly limonite/goethite or ironstone

Limonite (hydrated iron oxides; commonly goethite, FeO(OH), with hematite and/or magnetite)