Mineral Byproduct (Anthropogenic)

Slag Glass

Amorphous Silica Glass (with metal oxide inclusions)

Possible tektite or iron-rich slag-like natural specimen

Uncertain; possibly natural glass (tektite) or magnetite-rich rock

Silver (Sterling Silver Jewelry)

Argentum (Ag) mixed with Copper (Cu)

Pyrite in Matrix

Iron Sulfide (FeS2)

Asphalt Conglomerate

Artificial Bituminous Conglomerate

Iron-rich slag or weathered ironstone fragments

Probably hematite–goethite material; possibly industrial iron slag (Fe₂O₃/FeO(OH))

Slag (Industrial Glass Slag)

Amorphous Silicate Glass (often containing Al, Ca, Mg, and Ti oxides)

Possible basaltic volcanic rock or iron-rich meteorite

Likely basalt (plagioclase–pyroxene rock); meteorite status cannot be confirmed visually

Aqua Aura Quartz

Silicon Dioxide (SiO2) bonded with Gold (Au)

Silver (Jewelry form)

Native Silver (Ag)

Green Slag Glass

Cullet (Amorphous Silicon Dioxide with impurities)

Chert (Arrowhead Fragment)

Microcrystalline Quartz (SiO2)

Blue Slag Glass

Ferro-silicate glass (Slag)

Quartz (Engineered Quartz Surface)

Silicon Dioxide (SiO2) based composite

Quartz (Milky/River Quartz)

Silicon Dioxide (SiO2)

Calcite

Calcium Carbonate (CaCO3)

Conglomeratic gravel / polymictic breccia

Polymictic rudite, likely anthropogenic or beach/stream gravel; composition varies

Grooved Maun Ball (Maul/Hammerstone-like Concretion)

Calcareous/Ferruginous Concretion in Sandstone Matrix

Red Slag Glass

Amorphous Silica (Industrial byproduct with metallic oxide dopants)

Green sea glass or green glass-like tumbled material

Amorphous silicate glass; likely anthropogenic soda-lime glass, not a natural mineral

Granite Pebble

Granite (Phaneritic intrusive igneous rock comprising Quartz, Feldspar, and Mica)

Cullet Glass (Strawberry Glass)

Amorphous Silicon Dioxide (SiO2) with metallic dopants

Possible industrial slag or basaltic volcanic glass

Likely iron-rich vitreous slag; natural alternative: basaltic glass (tachylite)

Weathered metallic sulfide ore, likely pyrite-bearing rock

Pyrite (FeS₂), possibly in a quartz–iron-oxide host

Pyrite (on Quartz matrix)

Iron Disulfide (FeS2)

Silicon Carbide

Silicon Carbide (Moissanite / Carborundum), SiC

Mother of Pearl (Nacre)

Aragonite (CaCO3) with Organic Matrix

Queen Conch Shell (Biogenic Calcium Carbonate)

Aliger gigas (synonym Strombus gigas); Composition: Aragonite (CaCO3)

Quartz Pebble

Silicon Dioxide (SiO2)

Fired Clay Brick (Anthropic Rock substitute)

Anthropogenic polycrystalline ceramic (predominantly Mullite and Quartz: Al6Si2O13 + SiO2)

Green Obsidian Sphere (man-made glass)

Vitreous Silica with Chromium/Iron additives

Slag (Industrial)

N/A (Anthropogenic Slag)

Slag Glass (Cullet)

Amorphous Silica / Glass residue

Likely slag or metallic industrial byproduct

Unidentified iron-rich ferrous slag; possibly magnetite-bearing slag

Pyrite

Iron Sulfide (FeS2)

Concrete Fragment

Hardened Portland cement and mineral aggregate

Iron-rich vesicular rock, possibly slag or weathered basalt

Identification uncertain; likely ferruginous basalt/ironstone, with possible anthropogenic iron slag

Bismuth

Bismuth (Bi)

Slag

Ferrous slag (by-product of iron smelting)

Carborundum (Silicon Carbide)

Silicon Carbide (SiC)

Metal Chain (Likely Steel or a Steel Alloy)

Steel (primarily iron and carbon); specific alloy unknown

Asphalt (Road Aggregate)

Asphalt concrete / Bituminous mixture