Mineral (Man Made Glass, Not Natural)

Titanium Aura Quartz (Aura Quartz)

Titanium-coated Silicon Dioxide (SiO2)

Blue Slag Glass

Amorphous Silica (Byproduct of smelting)

Likely polished quartz or glass-like mineral cabochon

Probably quartz (SiO₂), though the image cannot exclude man-made glass

Polished green-and-black banded cabochon (likely malachite imitation or dyed agate)

Uncertain; possible malachite (Cu₂CO₃(OH)₂), banded agate (SiO₂), or man-made glass

Crushed Stone (Likely Limestone or Granite)

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

Ferrous Slag

Iron/Steel Slag (Complex Calcium-Alumino-Silicates)

Sandstone Concretion

Sedimentary Clastic Rock (Silicate-rich)

Concrete

Hydrated Portland Cement Aggregate Composite

Diamond (or Diamond Simulant)

Carbon (C)

Colorless faceted gemstone, likely glass or cubic zirconia

Uncertain; possible cubic zirconia (ZrO₂) or quartz (SiO₂), but the image may show a man-made simulant

Man-made Carved Stone (Scream Mask/Skull motif)

Carved Soapstone or Serpentine-rich rock

Concrete Rubble with Aggregate

Hardened Portland Cement Paste with Coarse Aggregate

Slag

Anthropogenic Vitreous Silica/Iron oxides

Concretion

Sedimentary Concretion (Ironstone / Calcite Concretion)

Mother of Pearl (Nacre)

Aragonite (CaCO3) with Organic Matrix

Chert Arrowhead (Projectile Point)

Microcrystalline Quartz (Chert or Flint)

Green Agate

Silicon dioxide (SiO₂)

Possible weathered basalt or slag fragment

Basalt, chiefly plagioclase and pyroxene; identification is uncertain from the image

Sandstone Concretion

Clastic Sedimentary Concretion (typically Quartz/Silica with Iron Oxide)

Tumbled green glassy mineral, possibly aventurine or fluorite

Uncertain; likely quartz variety (aventurine quartz, SiO₂) or green fluorite (CaF₂)

Blue Goldstone

Synthetic glass with copper or cobalt/manganese inclusions

Goldstone

Avventurina (Cu + SiO2 glass)

Man-made Jewelry (Metal and Glass/Plastic)

Synthetic Alloy and Amorphous Solid (SiO2/Polymer)

Rough Sapphire (Corundum)

Corundum (Al2O3)

Blue Goldstone

Aventurine Glass (SiO2 with Cobalt/Copper inclusions)

Goldstone (blue-goldstone–style glass) beads

Artificial aventurine glass, typically silica glass with copper inclusions; not a natural mineral

Diamond

Native Carbon (C)

Diamond (or Simulant)

Carbon (C) or Cubic Zirconia (ZrO2)

Chert

Microcrystalline Quartz (SiO2)

Tektite

Impactite (Natural Silicate Glass)

Ferro-silicate Slag

Industrial Vitrified Slag (High-silica amorphous glass)

Acrylic or Resin (Synthetic Imitation)

Polymethyl Methacrylate (PMMA) or Polyepoxide

Red glass-like crystal, likely synthetic ruby or red glass

Uncertain from image; possible corundum (ruby), Al₂O₃, or synthetic glass

Yellow Sapphire (Raw)

Corundum (Al2O3)

Polished black stone, likely black obsidian

Obsidian (volcanic glass), chiefly silica-rich rhyolitic composition

Diamond (in a jewelry setting)

Carbon (C)

Labradorite

Labradorite ((Ca, Na)(Al, Si)4O8)

Slag

Glassy silicate byproduct (anthropogenic material)

Sandstone Concretion

Septarian or Carbonate-cemented Sandstone Concretion

Glass / Silicon Dioxide (Man-made)

SiO2 (Amorphous Silicon Dioxide)

Chipped Glass/Plastic Fragment

Silicon dioxide (SiO2) for glass (amorphous) or various polymer compounds for plastic

Slag

Metallurgical by-product