Not A Natural Rock (Man Made Composite)

Opalite-style glass pendant

Man-made opalescent glass (not natural opal)

Diamond (or Simulant)

Carbon (C) or relevant simulant formula (e.g., ZrO2 for Cubic Zirconia)

Asphalt Concrete (Bituminous Conglomerate)

Anthropogenic Bituminous Conglomerate

Quartz (Engineered Quartz Surface)

Silicon Dioxide (SiO2) based composite

Aggregate Concrete

Anthropogenic Conglomerate (Technosol)

Brick

Fired clay or Ceramic material (no specific mineralogical scientific name as it's a composite)

Asphalt Concrete

Bituminous conglomerate

Blue goldstone (man-made glass)

Copper-bearing aventurine glass; synthetic silicate glass

Asphalt (Road Aggregate)

Asphalt concrete / Bituminous mixture

Opalite

Synthetic glass / Opalized glass

Opalite

Man-made Glass (Synthetic Opalized Glass)

Opalite (likely man-made glass)

Opalite is a trade name for opalescent glass, not a natural mineral; composition is typically silica glass with additives

Engineered Quartz (Quartzite look-alike)

Silicon Dioxide (SiO2) composite

Possible obsidian or slag glass

Volcanic glass, primarily SiO₂; alternatively industrial iron-rich glassy slag

Mother of Pearl (Nacre)

Aragonite (CaCO3) with Organic Matrix

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

Weathered concrete or cementitious slab (not natural rock)

Artificial calcium-silicate cement composite; likely Portland cement concrete

Iron-rich slag or ironstone; appearance is not diagnostic

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

Conglomerate

Conglomerate (clastic sedimentary rock)

Opalite

Man-made opalescent glass

Diamond

Native Carbon (C)

Opalite

Man-made Glass (SiO2 + additives)

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

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

Terrazzo (with Marble and Granite fragments)

Cementitious or resinous composite containing Calcium Carbonate (CaCO3) and Silicates

Sandstone (likely Fossilized Wood or Concrete Simulacrum)

Arenite / Silicified Wood / Anthropogenic Concrete

Opalite

Man-made opalized glass

Opalite

Synthesized glass / Silicon dioxide

Blue Obsidian (Cullet Glass)

Man-made silicate glass

Cullet Glass / Slag Glass

Amorphous silica glass

Dragon's Breath (Mexican Opal Glass)

Artisan Foil Glass (SiO2 based)

Opalite

Synthetic Opalized Glass

Opalite (Man-made Glass)

Synthetic Silicon Dioxide Glass (SiO2 + metal oxides)

Sea Glass

Man-made silicate glass

Polished opalite (likely man-made opalescent glass)

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

Opalite

Synthetic Opalite Glass / Opalized Glass

Stamped concrete made to resemble flagstone

Portland-cement concrete with decorative stone-textured finish

Opalite

Synthetic Opalite (Man-made glass)

Turquoise cabochon ring

Turquoise — hydrated copper aluminum phosphate, CuAl₆(PO₄)₄(OH)₈·4H₂O

Concrete fragment with Aggregate

Anthropogenic Concrete with Calcarious and Siliceous Aggregate

Blue Diamond

Carbon with Boron impurities (C)

Green Obsidian Sphere (man-made glass)

Vitreous Silica with Chromium/Iron additives

Blue Obsidian

Volcanic Glass (Amorphous)