Man Made Composite

Opalite

Man-made Glass (Synthetic Opalized Glass)

Titanium Aura Quartz

Titanium-coated Silicon Dioxide (SiO2)

Asphalt Concrete

Bituminous Concrete (Anthropic Rock)

Chert (Chalky Flint Node)

Chert (Microcrystalline Quartz, SiO2)

Iron-rich slag or ironstone; appearance is not diagnostic

Likely iron-oxide-rich material (hematite, Fe₂O₃, and/or magnetite, Fe₃O₄); possibly smelting slag

Opalite Egg

Synthetic Glass (Simulated Opal)

Rainbow Hematite Ring

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

Polymer Clay (Mock Mineral)

Polyvinyl chloride (PVC) with plasticizers and pigment

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)

White pebble, likely quartz or calcite

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

Polished blue glassy mineral specimen, likely sodalite or blue aventurine

Most consistent with sodalite (Na₈Al₆Si₆O₂₄Cl₂), though dyed quartzite or blue glass cannot be excluded from the photograph

Cubic Zirconia (Jewelry Setting)

Zirconium Dioxide (ZrO2)

Diamond

Native Carbon (C)

Conglomerate

Conglomerate (clastic sedimentary rock)

Blue Slag Glass

Anthropogenic Amorphous Silicon Dioxide

Blue glassy gemstone-like specimen

Indeterminate; possibly dyed or treated turquoise, blue apatite, or man-made glass

Red glassy gemstone, possibly garnet

Unidentified red transparent material; garnet group (X₃Y₂(SiO₄)₃) is a possibility

Blue Goldstone

Synthetic glass with cobalt and copper inclusions

Cubic Zirconia (Jewelry Setting)

Cubic Zirconia (ZrO2)

Aluminum Slag

Anthropogenic Aluminum (Al)

Dzi Bead (Etched Chalcedony)

Cryptocrystalline Quartz (SiO2) with chemical etching

Cullet (Slag Glass)

Amorphous Silica (SiO2) with various metal oxide colorants

Dragon's Breath (Mexican Opal Glass)

Artisan Foil Glass (SiO2 based)

Milky quartz

Quartz (silicon dioxide, SiO₂)

Sea Glass

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

Polished opalite (likely man-made opalescent glass)

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

Sea Glass

Man-made silicate glass (Amorphous silicon dioxide)

Decorative gemstone-chip jewelry (likely turquoise, coral, and assorted beads)

Predominantly turquoise, CuAl₆(PO₄)₄(OH)₈·4H₂O; other pieces appear to be dyed coral or red stone, and possibly shell/metal components

Likely tumbled red mineral or glass imitation

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

Slag

Anthropogenic Vitreous Silica/Iron oxides

Concrete rubble

Anthropogenic conglomerate

Lava Rock with Fabric Impression

Scoria or Basalt with anthropogenic impressions

Quartz crystal fragment (likely milky quartz)

Quartz, silicon dioxide (SiO₂)

Dalmatian Stone

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

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

Green-and-white terrazzo (likely serpentine/marble aggregate)

Composite decorative stone; probable serpentinite (Mg₃Si₂O₅(OH)₄) with white calcite marble fragments in cementitious matrix