Anthropogenic (Man Made Industrial Deposit)

Possible weathered basalt or slag fragment

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

Blue Sapphire (Synthetic or Man-made Glass Imitation)

Corundum (Al2O3) if natural; Lead-glass or Spinal if synthetic

Rainbow Hematite Ring

Iron(III) oxide (Fe2O3) with thin-film coating

Concrete with Aggregate

Artificial Conglomerate (Cement and Aggregate)

Opalite

Opalescent Glass (SiO2 + coloring agents)

Milky quartz (likely)

Quartz, silicon dioxide (SiO₂)

Tumbled black stone, likely black obsidian

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

Tumbled milky quartz pebble

Quartz (silicon dioxide, SiO₂)

Iron Slag (Industrial Byproduct)

Anthropogenic pyrometallurgical residue

Blue Goldstone

Man-made glass with cobalt and metal flecks

Man-made Metal Pin (Non-geological)

Antimony-Lead Alloy or Zinc/Brass Base with Electroplating

Man-made Jewelry Charm (Enameled Metal)

Not a natural mineral; composed of base metal alloy (likely zinc or brass) and epoxy resin/enamel.

White pebble, likely quartz or calcite

Indeterminate from image; possible microcrystalline quartz (SiO₂) or calcite (CaCO₃)

Cubic Zirconia (Jewelry Setting)

Zirconium Dioxide (ZrO2)

Sea Glass

Amorphous silicon dioxide (man-made glass weathered by nature)

Blue Goldstone

Synthetic glass with cobalt and copper inclusions

Dragon's Breath (Mexican Opal Glass)

Artisan Foil Glass (SiO2 based)

Polished white calcite sphere (identification tentative)

Calcite, CaCO₃

Milky quartz

Quartz (silicon dioxide, SiO₂)

N/A - Man-made object (Jewelry Chain)

Antiqued or Oxidized Metal Chain (often Steel or Brass)

Diamond (in a gold ring)

Diamond (pure carbon, C)

Clear quartz crystal (likely)

Quartz, silicon dioxide (SiO₂)

Chert / Flint Handaxe

Cryptocrystalline Quartz (SiO2)

Concrete-like aggregate surface with embedded rock fragments

Anthropogenic concrete or exposed aggregate; not a natural rock specimen

Sea Glass

Man-made silicate glass (Amorphous silicon dioxide)

Small rounded mineral pebble, possibly quartz

Uncertain; likely microcrystalline or crystalline SiO₂ (quartz), potentially with iron-oxide staining

Titanium Aura Quartz

Silicon Dioxide (SiO2) coated with Titanium and Niobium

Concretion with Geode Cavity

Ferruginous Sandstone Concretion with Quartz Center

Concrete fragment or Conglomerate

Artificial Conglomerate (Concrete) or Natural Conglomerate

Quartz crystal fragment (likely milky quartz)

Quartz, silicon dioxide (SiO₂)

Dalmatian Stone

Dalmatian Jasper (a misnomer for an Aplite with Arfvedsonite spots)

Likely tumbled red mineral or glass imitation

Indeterminate; possibilities include red jasper (microcrystalline quartz, SiO₂) or dyed chalcedony

Blue Impression Jasper beads

Impression jasper (microcrystalline quartz/chalcedony), chiefly SiO₂, with iron-oxide and other mineral inclusions

Cupronickel (on a 1981 Mexico 20 Pesos coin)

Copper-Nickel Alloy (Cu75Ni25)

Polished opalite (likely man-made opalescent glass)

Opalite is a commercial name, not a mineral; typically opalescent glass, often soda-lime silicate glass

Slag (Industrial Glass)

Anthropogenic Vitreous Slag (Post-industrial byproduct)

Tumbled amber-colored chalcedony or jasper

Microcrystalline quartz (SiO₂), likely iron-stained chalcedony/jasper

Slag (Industrial By-product)

Anthropogenic Vitreous Silica/Iron Silicate

Aura Quartz

Silicon Dioxide (SiO2) with metallic vapor coating

Sea Glass

Man-made vitreous material (silica-based glass)

Cullet Glass (Man-made Glass Slag)

Amorphous Silica (SiO2) with chemical additives

Porcelain (White Ceramic)

Mullite-bearing Vitrified Ceramic (Major phases: Mullite Al6Si2O13, Glassy Silica SiO2)