Mineraloid (Human Made Geological Specimen)

Goldstone (blue-goldstone–style glass) beads

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

Limonite (Iron Ore)

Limonite (an amorphous mixture of hydrated iron oxides, primarily FeO(OH)·nH2O)

Polished milky quartz (likely quartz worry stone or wand)

Quartz, silicon dioxide (SiO₂)

Polished banded agate pendant

Agate, a microcrystalline variety of chalcedony (SiO₂)

Opalite

Man-made opalescent glass

Chert (often called Flint)

Chert (Microcrystalline Quartz, SiO2)

Possible basalt or iron-rich slag

Basalt (tentative; identification uncertain from image)

Pearl (Biogenic Mineraloid)

Calcium carbonate (CaCO3) primarily as Aragonite

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)

Rose Gold (Copper-Gold Alloy)

Aurum-Cuprum Alloy (Au-Cu)

Carved Mottled Greenish-Yellow Crystal/Glass Object

Unknown; possibly a form of quartz (chalcedony/jadeite/nephrite) or glass/resin.

Engineered Quartz (Quartzite look-alike)

Silicon Dioxide (SiO2) composite

Road-surface aggregate (crushed stone)

Unidentifiable mixed lithic aggregate; likely basaltic/andesitic fragments with feldspar, quartz, and weathered rock

Pearl

Calcium carbonate (CaCO3) - mainly Aragonite with Conchiolin

Opaline Glass (Opalite)

Synthetic Silicon Dioxide Glass

Unidentified polished dark stone with a possible quartz fragment

Indeterminate; appearance may reflect polished basalt, obsidian, or iron-rich rock, with a pale quartz/feldspar inclusion

Limonite (Yellow Ochre)

Limonite (an amorphous mixture of hydrated iron oxides, primarily FeO(OH)·nH2O)

Dyed turquoise-colored lava stone beads

Vesicular basalt (scoria), commonly sold as dyed lava rock

Ornamental ring with likely blue sapphire and diamonds

Blue corundum (sapphire), Al₂O₃; surrounding stones appear diamond, C, set in gold-colored metal

Red gemstone ring, likely garnet or synthetic ruby

Possibly almandine garnet (Fe₃Al₂(SiO₄)₃) or corundum/ruby (Al₂O₃); image alone cannot distinguish

Sea Glass

Man-made vitreous material (silica-based glass)

Pearls (likely freshwater cultured pearls)

Pearl: nacre, primarily aragonite (CaCO₃) with conchiolin

Opalite

Man-made Glass (Synthetic Opalized Glass)

Note: Item is not a geological specimen

Homo sapiens (Dermal Appendage: Pilus)

Concrete with Aggregate

Composite construction material; primary matrix is Calcium Silicate Hydrate (C-S-H)

Beaded mineral/crystal jewelry (likely turquoise and coral accents)

Variable; blue beads may be turquoise (CuAl6(PO4)4(OH)8·4H2O), with possible dyed howlite, glass, or composite materials

Clear Quartz (Rock Crystal) Bead

Silicon Dioxide (SiO2)

Chert (Flint)

Silicon Dioxide (SiO2)

Opalite

Synthetic Opalised Glass

Pearl

Aragonite / Calcium Carbonate (CaCO3)

Opalite

Synthetic Glass (Amorphized Silicon Dioxide)

Cullet Glass (Slag Glass)

Amorphous Silicon Dioxide (Industrial Man-made)

Possible basalt or industrial iron-rich slag

Basalt (plagioclase–pyroxene rock); identification uncertain from image

Blue glass-like tumbled specimen

Most likely cobalt-blue slag glass or manufactured glass; not confidently identifiable as a natural mineral from the image

Gold

Native Gold (Au)

Crackled Quartz (Blue Dyed)

Silicon Dioxide (SiO2) with anthropogenic dye

Limonite/Goethite on Shale

Hydrous ferric oxides (FeO(OH)·nH2O) often associated with argillaceous rock

Dragon's Breath (Mexican Opal Glass)

Artisan Foil Glass (SiO2 based)

Sea Glass

Amorphous silicon dioxide (glass)

Snowflake Obsidian

Spherulitic Volcanic Glass (primarily SiO2 with Cristobalite inclusions)

Synthetic Resin (Artificial Specimen)

Polyurethane or Polyester Resin

Chert (specifically Flint)

Chert (SiO2)