Mineral (Man Made Glass, Not Natural)

Stainless Steel (Polished)

Ferrous Alloy containing Iron (Fe), Chromium (Cr), and Carbon (C)

Goldstone and pink quartz bead strands

Goldstone is aventurescent copper-bearing glass; pink beads are likely rose quartz (SiO₂), though dyed or glass imitations are possible

Green Aventurine

Silicon Dioxide (SiO2) with inclusions of Fuchsite (K(Al,Cr)2AlSi3O10(OH)2)

Chert (Arrowhead/Artifact Fragment)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Yellow cabochon gemstone, likely citrine or yellow glass imitation

Quartz (SiO₂), if natural citrine; visual evidence is insufficient to exclude man-made glass or resin

Chert Concretion

Chert (Microcrystalline Quartz, SiO2)

Fluorite (Polished Point/Tower)

Calcium Fluoride (CaF2)

Blue Crackle Quartz (Dyed Quarzite)

Silicon Dioxide (SiO2) with artificial dye

Asphalt Concrete (Bituminous Pavement)

Aggregates in Bitumen Matrix

Concrete with Aggregate

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

Diamond

Carbon (C)

Quartz crystal (likely clear quartz)

Quartz, silicon dioxide (SiO₂)

Sea Glass (specifically Frosted White)

Amorphous Silica (substance: Sodium-calcium silicate glass)

Carved Stone Turtle

Carved Soapstone and Quartz

Hematite Beads

Hematite (Fe2O3)

Concretion (Sandstone)

Carbonate-cemented Sandstone Concretion

Felsic Drill Core (likely Gneiss or Granite)

Felsic Metamorphic Rock (Gneissic profile)

Blue slag glass / industrial smelter slag

Man-made iron-rich silicate slag; composition variable, commonly Fe–Ca–Mg–Al silicates with glassy phases

Aluminum Slag

Anthropogenic Aluminum (Al)

Corundum (Pink Sapphire / Ruby)

Al2O3 (Aluminum Oxide)

Tumbled aqua glassy mineral specimen, likely chrysocolla or turquoise imitation

Uncertain from image; possible chrysocolla (hydrated copper aluminosilicate, variable composition) or dyed/man-made glass

Polished dendritic agate or jasper

Microcrystalline quartz (SiO₂), likely chalcedony with iron/manganese dendrites

Green glassy mineral fragment, possibly fluorite

Fluorite (calcium fluoride, CaF₂), tentative identification

Cobalt Glass Slug (Cullet)

Man-made Silicate Glass with Cobalt Oxide (CoO)

Slag Glass

SiO2 (Silicon Dioxide) with impurities

Concrete Fragment

Artificial Conglomerate (Cement and Aggregate)

Metal Alloy (Likely Pewter or Sterling Silver)

Not a natural geological specimen; composed of refined metals. If pewter, it's a tin-based alloy. If sterling silver, it's 92.5% silver and 7.5% other metals (usually copper).

Iron Slag (Industrial Byproduct)

Anthropogenic Vitrification Product/Ferrous Slag

Asphalt Concrete

Bituminous Concrete (Anthropic Rock)

Ferrochrome Slag

Anthropogenic slag (Fe-Cr alloy waste)

Slag (Industrial Byproduct)

Artificial silicate/iron byproduct

Concrete with Aggregate

Artificial Conglomerate (Cement and Aggregate)

Polished brown jasper (likely brecciated or orbicular jasper)

Microcrystalline quartz/chalcedony, SiO₂, with iron-oxide and other mineral inclusions

Glass Nugget (Tumbled Glass)

Amorphous Silicon Dioxide (SiO2) with additives

Transit Token (RTD Denver)

Nickel-plated brass or bronze alloy (Cu-Sn-Zn-Ni)

Obsidian (likely black volcanic glass)

Obsidian; primarily amorphous volcanic silica glass, approximately SiO₂-rich rhyolitic composition

Red cabochon gemstone ring (likely glass or synthetic stone)

Undetermined; the image does not establish a natural mineral identity

Dzi Bead (Etched Chalcedony)

Cryptocrystalline Quartz (SiO2) with chemical etching

Blue glass-like tumbled specimen

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

Green glassy mineral specimen, likely rough emerald or green fluorite

Tentatively beryl (Be₃Al₂Si₆O₁₈), emerald variety; synthetic/man-made glass cannot be excluded from the photograph

Titanium-coated Metal Cube (Man-made Fidget Toy)

Titanium-anodized or electroplated alloy (e.g., Ti-coated Zinc or Aluminum)

Cubic Zirconia

Cubic Zirconium Dioxide (ZrO2)