Not A Rock (Man Made Industrial Metal)

Sandstone Concretion

Limonitic Sandstone Concretion

Green Sea Glass

Man-made silicate glass (weathered)

Crushed Stone (Likely Limestone or Granite)

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

Diamond

Native Carbon (C)

Pink Cubic Zirconia (CZ)

Zirconium Dioxide (ZrO2)

Diamond (as set in a metal alloy ring)

Diamond (Pure Carbon, C)

Tumbled chalcedony pendant (likely agate)

Chalcedony, microcrystalline quartz (SiO₂); the pale bands suggest agate

Orange glassy slag (industrial by-product)

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

Aura Quartz (Coated Quartz)

Silicon Dioxide (SiO2) treated with metallic vapor

Baked-clay ceramic fragment (likely brick or pottery)

Fired clay, primarily aluminosilicate minerals; not a natural rock

Polished brecciated jasper pendant

Jasper, an opaque microcrystalline variety of chalcedony (mostly SiO₂), with iron-oxide staining and likely brecciation

Sandstone Concretion

Clastic sedimentary rock (primarily Quartz SiO2)

Chert Arrowhead (Projectile Point)

Microcrystalline Quartz (Chert or Flint)

Diamond (Cluster Ring)

Carbon (C)

Sandstone Concretion

Clastic Sedimentary Rock (primarily SiO2 with mineral cement)

Lapis lazuli bead bracelet

Lapis lazuli, chiefly lazurite (Na₃Ca(Si₃Al₃)O₁₂S); commonly with calcite and pyrite

Green sea glass (likely bottle glass)

Man-made soda–lime silicate glass; not a natural mineral

Green sea glass (likely)

Man-made glass, likely soda-lime silicate glass; not a natural mineral or rock

Small brown rock fragment; exact identification uncertain

Unidentified fine-grained lithic fragment

Titanium Aura Quartz

Titanium bonded Silicon Dioxide (SiO2 + Ti)

Chert Concretion (with typical hematite/limonite staining)

Sedimentary Concretion (SiO2 with FeO(OH)⋅nH2O)

Carnelian cabochon pendant

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

Blue sea glass or blue glassy mineral fragment

Uncertain; likely man-made soda-lime glass, not a natural mineral

Clear quartz fragment (rock crystal)

Quartz, silicon dioxide (SiO₂)

Terracotta (Man-made ceramic brick fragment)

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

Aura Quartz (Titanium Quartz)

Titanium-coated Silicon Dioxide (SiO2 + Ti)

Polished obsidian

Volcanic glass; predominantly rhyolitic SiO₂

Opalite

Synthetic Glass (Amorphized Silicon Dioxide)

Opalite

Synthetic Glass (Simulated Opal)

Blue Obsidian

Volcanic Glass (SiO2 with inclusions)

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Ferrochrome Slag

Calcium-Aluminium-Magnesium Silicate Slag

Amethyst gemstone ring

Quartz, purple variety — SiO₂

Decorative gemstone-chip jewelry (likely turquoise, coral, and assorted beads)

Predominantly turquoise, CuAl₆(PO₄)₄(OH)₈·4H₂O; other pieces appear to be dyed coral or red stone, and possibly shell/metal components

Iron-rich meteorite candidate

Undetermined; possible stony-iron or iron meteorite, commonly kamacite–taenite (Fe–Ni)

Beads (likely glass or man-made material)

N/A (artificial material)

Quartz and Iron Oxide

Quartz (Silicon Dioxide, SiO2) with possible Limonite/Hematite inclusions

Gemstone bead necklace (likely citrine or yellow quartz)

Quartz, SiO₂; precise identification is uncertain because the beads are blurred and metal settings obscure them

Iron Slag

Anthropogenic Vitreous Ferrous Silicate

Likely blue glass or synthetic gemstone jewelry

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

Goldstone

N/A (Synthetic Glass with Copper Inclusions)

Man-made Polished Porcelain Tile (Artificial Geologic Lookalike)

Fused Silicate Ceramic with Alumina (Synthetic Kaolinite derivative)