Man Made Material (Metal)

Sea Glass

Silicon dioxide (mostly)

Green Sea Glass

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

Carborundum (Silicon Carbide)

Silicon carbide (SiC)

Slag Glass (Cullet)

Amorphous Silica (man-made), primarily SiO2 with trace metal oxides

Goldstone

Avventurina (Man-made Glass with Copper inclusions)

Quartz pebble (Quartztite fragment)

Silicon Dioxide (SiO2)

Diamond

Carbon (C)

Goldstone

Aventurine Glass (Man-made glass with copper inclusions)

Blue-beaded gemstone jewelry, likely lapis lazuli or dyed blue agate

Uncertain from the image; possible lazurite-bearing lapis lazuli (Na₃Ca(Si₃Al₃)O₁₂S) or blue chalcedony (SiO₂)

Carborundum (Silicon Carbide)

Silicon Carbide (SiC)

Sea Glass

Man-made vitreous material (silica-based glass)

Polished black stone, likely black obsidian

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

Blue Crackle Quartz (Dyed Quarzite)

Silicon Dioxide (SiO2) with artificial dye

Blue Obsidian (Cullet Glass)

Silicon Dioxide (Amorphous Glass)

Ceramic or Polished Stone Heart (Anthropogenic Material)

Glazed Ceramic (Silicon Dioxide based coating on Alumina Silicate body) or Polished Limestone/Marble (Calcium Carbonate, CaCO3)

Goldstone (Red)

Aventurine Glass (SiO2 + Cu)

Goldstone (Red)

Aventurine Glass (Cupriferous glass)

Sea Glass

Man-made silicate glass

Opalite

Man-made opalescent glass

Slag Glass

Amorphous Silicate (Man-made)

Asphalt (Road Aggregate)

Bituminous Conglomerate / Asphalt Concrete

Carborundum

Silicon Carbide (SiC)

Ferro-slag (Leland Blue/Slag Glass)

Anthropogenic Vitreous Silica (Industrial Slag)

Blue slag glass or dyed glass-like industrial material

Amorphous silicate glass; likely copper-bearing blue slag, but possibly colored man-made glass

Sandstone Concretion

Limonitic Sandstone Concretion

Cullet (Slag Glass)

Amorphous Silica (Industrial byproduct)

Gold (Elemental Metal)

Gold (Au)

Sea Glass

Man-made silicate glass

Industrial Slag

Anthropogenic Vitreous Slag

Gemstone bead necklace (likely citrine or yellow quartz)

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

Slag Glass (Cullet)

Amorphous Silicon Dioxide (SiO2) with metal oxide colorants

Green Glass Cullet / Recycled Glass

Amorphous Silicon Dioxide (SiO2) with various metal oxides

Artificial Rock Face (Faux Rock)

Glass Fiber Reinforced Concrete (GFRC)

Ferro-silicate Slag

Industrial Vitrified Slag (High-silica amorphous glass)

Pink Cubic Zirconia (CZ)

Zirconium Dioxide (ZrO2)

Metal Alloy (Jewelry)

Not a naturally occurring rock or mineral; likely a metal alloy for jewelry. Possible compositions include sterling silver (92.5% silver, 7.5% copper), or other silver/gold alloys.

Slag (Industrial Glass/Metal)

Ferrous slag or Glassy silicate byproduct

Ferruginous Conglomerate (or Iron-Rich Concrete/Slag)

Clastic Sedimentary (Silicon Dioxide/Iron Oxide matrix)

Aura Quartz (Titanium Quartz)

Titanium-coated Silicon Dioxide (SiO2 + Ti)

Concretion (Sandstone)

Carbonate-cemented Sandstone Concretion

Lapis lazuli and green-blue chalcedony jewelry

Lapis lazuli: lazurite-bearing metamorphic rock, chiefly lazurite (Na₃Ca(Al₃Si₃O₁₂)S) with calcite and pyrite; second stone: likely chrysoprase or green-blue chalcedony (microcrystalline quartz, SiO₂)

Blue Obsidian

Volcanic Glass (SiO2 with inclusions)