Man Made Byproduct (Non Geological)

Polished obsidian

Volcanic glass; predominantly rhyolitic SiO₂

Pyrite

Iron Sulfide (FeS2)

Pink Cubic Zirconia (CZ)

Zirconium Dioxide (ZrO2)

Mixed gemstone bead bracelet

Likely rose quartz, amethyst, and possibly rhodonite or lepidolite beads

Engineered Quartz (Quartzite look-alike)

Silicon Dioxide (SiO2) composite

Fired Clay Brick (Anthropic Rock substitute)

Anthropogenic polycrystalline ceramic (predominantly Mullite and Quartz: Al6Si2O13 + SiO2)

Chert (Flint/Chalcedony)

Silicon Dioxide (SiO2)

Obsidian

Volcanic glass (SiO2 - Silicon Dioxide)

Green Slag Glass

Amorphous Silica Glass (Anthropogenic)

Aventurine

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

Sea Glass (Cobalt Blue)

Amorphous Silica (Glass with Cobalt additives)

Nickel coin (U.S. currency)

Cupronickel (75% Copper, 25% Nickel alloy)

Rainbow Hematite (Man-made/Treated)

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

Likely industrial slag or weathered basalt

Basaltic rock; possibly iron-rich furnace slag (diagnosis uncertain from image)

Copper slag or vesicular basalt with copper minerals

Industrial slag / Basaltic matrix with secondary copper minerals

Silver (Sterling Silver Jewelry)

Argentum (Ag) mixed with Copper (Cu)

Synthetic Faux Fur Fursuit

Polyacrylonitrile / Polyester (Synthetic Textile)

Man-made Dyed Aura Quartz

Silicon Dioxide (SiO2) with metallic coating/dye

Asphalt Chunk

Asphalt concrete

Chert (Flint / Quartz Nodule)

Microcrystalline Quartz (SiO2)

Tumbled black obsidian (likely)

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

Faceted Glass (Costume Jewelry)

Amorphous Silicon Dioxide with colorants (Glass)

Jewelry Chain with Blue and Clear Gemstones (Likely Cubic Zirconia)

Cubic Zirconia (ZrO₂), Silver or White Gold/Platinum Alloy

Marble

Recrystallized Calcite (CaCO3)

Iron Slag

Anthropogenic Vitreous Silicate (Byproduct of Smelting)

Blue tumbled glass-like specimen; likely blue slag glass

Likely man-made glass (silicate glass), not a natural mineral; exact material cannot be confirmed from the image

Note: Item is not a geological specimen

Homo sapiens (Dermal Appendage: Pilus)

Quartzite

Metamorphic Quartzite (SiO2)

Sea Glass

Amorphous Silica (Glass) SiO2

Likely weathered iron-rich rock or slag fragment

Indeterminate; possibly limonite/goethite-bearing rock (FeO(OH)·nH₂O) or industrial iron slag

Dyed Crackle Quartz

Silicon Dioxide (SiO2) with synthetic dye

Quartzite

Metamorphic Quartzite (SiO2)

Calcite

Calcium Carbonate (CaCO3)

Green Quartzite

Metamorphic Quartz Sandstone (SiO2)

Dyed Dragon Vein Agate

Silicon Dioxide (SiO2) with artificial pigment

Weathered concrete or cementitious slab (not natural rock)

Artificial calcium-silicate cement composite; likely Portland cement concrete

Colorless faceted quartz-like gemstone

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

Quartzite

Metamorphic Rock (Mainly SiO2)

Clear-stone silver-tone teardrop earring

The stones may be colorless quartz or glass; the image does not allow reliable identification. Metal setting appears silver-tone.

Blue Impression Jasper beads

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

Chert (Arrowhead/Artifact Fragment)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Tumbled aqua glassy mineral specimen, likely chrysocolla or turquoise imitation

Uncertain from image; possible chrysocolla (hydrated copper aluminosilicate, variable composition) or dyed/man-made glass