Not A Rock (Man Made Industrial Metal)

Ferrochrome Slag

Anthropogenic silicate/oxide glass (Complex silicate matrix with Cr-Fe-Si inclusions)

Crushed Stone (Likely Limestone or Granite)

Calcium Carbonate (CaCO3) for Limestone / Quartz and Feldspar for Granite

Chert Arrowhead (Projectile Point)

Microcrystalline Quartz (Chert or Flint)

Aura Quartz (Titanium Quartz)

Titanium-coated Silicon Dioxide (SiO2 + Ti)

Titanium Aura Quartz

Titanium bonded Silicon Dioxide (SiO2 + Ti)

Sandstone (with man-made markings)

Arenite (composed primarily of Quartz, SiO2)

Possible basaltic rock or meteorite candidate

Likely vesicular basalt; meteorite identification cannot be confirmed visually

Chert (Yellow Jasper/Flint)

Microcrystalline Quartz (SiO2)

Opalite

Synthetic Glass (Amorphized Silicon Dioxide)

Blue Obsidian

Volcanic Glass (SiO2 with inclusions)

Likely blue glass or synthetic gemstone jewelry

Uncertain; possibly synthetic spinel, cubic zirconia, or blue glass

Cobalt Glass Slug (Man-made Glass)

Amorphous Silica with Cobalt Oxide (SiO2 + CoO)

Opalite

Synthetic Glass (Simulated Opal)

Peridot (Olivine)

Olivine ((Mg, Fe)2SiO4)

Chert (Chalky Flint Node)

Chert (Microcrystalline Quartz, SiO2)

Orgonite Pyramid (containing Amethyst and mixed minerals)

Silicon Dioxide (SiO2) in synthetic resin

Gold (Elemental Metal)

Gold (Au)

Goldstone

N/A (Synthetic Glass with Copper Inclusions)

Blue Goldstone

Synthetic Aventurescent Glass (Cobalt-doped soda-lime glass)

Zircon

Zircon (Zirconium Silicate - ZrSiO4)

Coal (Bituminous Coal)

Caustobiolith / Sedimentary Rock

Asphalt Chunk

Asphalt concrete

Sea Glass (specifically Frosted White)

Amorphous Silica (substance: Sodium-calcium silicate glass)

Green Aventurine

Quartzite with Fuchsite inclusions (SiO2 + K(Al,Cr)2(AlSi3O10)(OH)2)

Man-made Polished Porcelain Tile (Artificial Geologic Lookalike)

Fused Silicate Ceramic with Alumina (Synthetic Kaolinite derivative)

Rainbow Hematite Ring

Iron(III) oxide (Fe2O3) with thin-film coating

Concrete with Aggregate

Artificial Conglomerate (Cement and Aggregate)

Iron-rich meteorite candidate

Undetermined; possible stony-iron or iron meteorite, commonly kamacite–taenite alloy

Tumbled milky quartz pebble

Quartz (silicon dioxide, SiO₂), opaque-to-translucent milky variety

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

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

Concrete fragment or Conglomerate

Artificial Conglomerate (Concrete) or Natural Conglomerate

Titanium Aura Quartz

Silicon Dioxide (SiO2) coated with Titanium and Niobium

Concretion with Geode Cavity

Ferruginous Sandstone Concretion with Quartz Center

Blue Impression Jasper beads

Impression jasper (microcrystalline quartz/chalcedony), chiefly SiO₂, with iron-oxide and other mineral inclusions

Bauxite

Bauxite (Al(OH)3, AlO(OH), AlOOH)

Aura Quartz

Silicon Dioxide (SiO2) with metallic vapor coating

Uncertain small metallic-looking mineral/rock fragment

Indeterminate; possibly galena-bearing rock or metallic slag

United States Quarter Dollar

Cupronickel Clad Alloy (75% Copper, 25% Nickel over a 100% Copper core)

Malaysian 50 Sen Coin

Coinage (specific alloy unknown without metallurgical analysis, but typically brass or bronze for this denomination and era)

Green Sea Glass

Man-made silicate glass (weathered)

Synthetic Blue Aura Quartz

Silicon Dioxide (SiO2) with Metallic Infusion

Beads (likely glass or man-made material)

N/A (artificial material)