Mineral (Man Made Glass, Not Natural)

Quartz

Silicon dioxide (SiO₂)

Chert / Flint

Cryptocrystalline quartz (SiO2)

Probable amber fragment

Amber (fossilized plant resin; chiefly amorphous organic resin, commonly dominated by succinite)

Pearl (Biogenic Mineraloid)

Calcium carbonate (CaCO3) primarily as Aragonite

Pearl

Calcium Carbonate (mostly Aragonite), CaCO3 (with conchiolin)

Diamond (in jewelry setting)

Carbon (C)

Diamond (in jewelry setting)

Adamantine Carbon (C)

Diamond

C (Pure Carbon)

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)

Granite

Phaneritic Plutonic Felsic Rock (SiO2, KAlSi3O8, NaAlSi3O8, CaAl2Si2O8)

Green Aura Quartz (Titanium treated Kyanite or Quartz)

Silicon Dioxide (SiO2) or Aluminum Silicate (Al2SiO5) with Titanium/Metal Oxide coating

Chert (Flint)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Natural Pearl (appearing in a jewelry setting)

Calcium Carbonate (mostly Aragonite), CaCO3 with Conchiolin

Sandstone (Ferruginous)

Arenite (SiO2 with Fe2O3 inclusions)

Diamond (Cut Gemstone)

Natural Carbon (C)

Diamond (in a jewelry setting)

Cubic Carbon (C)

Turquoise (likely stabilized or simulated Howlite)

CuAl6(PO4)4(OH)8·4H2O (Hydrous phosphate of copper and aluminium)

Sandstone

Sedimentary Rock (Quartz Sandstone)

Pearl (Biogenic)

Nacre / Calcium Carbonate (CaCO3)

Turquoise

Hydrated phosphate of copper and aluminum, CuAl6(PO4)4(OH)8·4H2O

Pearl-and-gemstone insect brooch

Pearl: nacre (aragonite, CaCO₃); colored stones are likely synthetic or natural corundum/spinel/glass, not determinable from the image

Diamond

Natural Diamond (Carbon, C)

Sandstone (likely Fossilized Wood or Concrete Simulacrum)

Arenite / Silicified Wood / Anthropogenic Concrete

Titanium Coated Aura Quartz (Apple Aura Quartz)

Silicon Dioxide (SiO2) with Metallic Vapor Deposition Coating

Slag Glass (Cullet)

Amorphous Silicon Dioxide (SiO2) with metal oxide colorants

Diamond (Cut and Polished)

Diamond (pure Carbon, C)

Black Obsidian

Obsidian (Volcanic Glass, SiO2 + impurities)

Green Aventurine

Quartz (SiO2) with Fuchsite inclusions

Diamond

Carbon (C)

Synthetic Marbled Aggregate (Footwear Component)

Ethylene-vinyl acetate (Croslite™)

Smoky Quartz

Silicon Dioxide (SiO2)

Red Swirl Beads (Likely Resin or Glass, simulating Red Jasper or Agate)

N/A (for the beads as pictured); Red Jasper: SiO2 (Chert variety); Red Agate: SiO2 (Chalcedony variety)

Bismuth Crystal

Bismuth (Bi)

Slag (Industrial Byproduct)

Ferro-silicate glass (Slag)

Slag

Ferrous Slag (Siliceous industrial waste)

Man-made Synthetic Material (Costume Faux Fur)

Synthetic Polymer (Polyester/Acrylic)

Sandstone Pebble

Ferruginous Sandstone (SiO2 with Fe2O3)

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)

Chert (Field-collected Arrowhead-shaped Fragment)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Diamond

C (Carbon)

Dyed Blue Agate Slice

Silicon Dioxide (SiO2)

Granite

Granite (a phaneritic intrusive igneous rock consisting mainly of quartz, alkali feldspar, and plagioclase)