Man Made Mineral Simulant (Glass)

Strawberry Quartz

Silicon Dioxide (SiO2) with Hematite or Goethite inclusions

Sea Glass

Man-made vitreous material (silica glass)

Red Slag Glass

Amorphous Silica (Industrial byproduct with metallic oxide dopants)

Green sea glass or tumbled green quartz (uncertain)

Likely quartz (SiO₂) if natural; alternatively man-made soda-lime glass

Sea Glass

Man-made silicate glass (Amorphous silicon dioxide)

Asphalt (Road Aggregate)

Bituminous conglomerate

Opalite

Synthetic opalescent glass

Clear quartz fragment (rock crystal)

Quartz, silicon dioxide (SiO₂)

Opalite

Synthetic Glass (Hydrated Crystalline Silicon Dioxide simulation)

Mystic Topaz (Treated Quartz or Topaz)

Aluminum silicate fluoride hydroxide [Al2SiO4(F,OH)2] with thin-film metallic coating

Blue Obsidian (Cullet Glass)

Silicon Dioxide (Amorphous Glass)

Opalite (likely man-made opalescent glass)

Opalite; not a true mineral, typically synthetic opalescent glass (silica-based)

Goldstone

Man-made glass infused with metallic copper

Pyrite in Quartz (Drill Core)

Silicon Dioxide (SiO2) with Iron Sulfide (FeS2) inclusions

Sea Glass

Man-made silicate glass weathering product

Small greenish crystal/mineral fragment

Indeterminate; possibly olivine, quartz, or a green gemstone fragment

Concrete Fragment

Hardened Portland cement and mineral aggregate

Black glassy fragment, likely obsidian or industrial glass

Volcanic glass (obsidian), chiefly amorphous SiO₂; identification uncertain from image

Opalite

Synthetic Opalized Glass (SiO2 + additives)

Jewelry Chain with Blue and Clear Gemstones (Likely Cubic Zirconia)

Cubic Zirconia (ZrO₂), Silver or White Gold/Platinum Alloy

Blue glassy-looking specimen, possibly dyed or coated mineral

Not identifiable from the photograph; possibilities include dyed quartz or glassy slag, but composition cannot be established visually.

Asphalt Concrete (Bituminous Conglomerate)

Anthropogenic Bituminous Conglomerate

Opalite (Man-made Glass)

Fused glass (typically made of dolomite and metal opacifiers)

Decorative mosaic cross containing mixed rock and glass fragments

Polychrome aggregate; likely quartz, feldspar, marble, granite, and assorted colored glass

Cullet Glass (Slag Glass)

Amorphous Silicon Dioxide (Industrial byproduct)

Rock crystal (clear quartz), possibly cloudy quartz

Quartz, silicon dioxide (SiO₂)

Rock crystal quartz fragments

Quartz (silicon dioxide, SiO₂)

ABS Plastic (Acrylonitrile Butadiene Styrene)

(C8H8)x·(C4H6)y·(C3H3N)z

Clear Quartz (Faceted) or Cubic Zirconia / Glass imitation

SiO2 (if Quartz), ZrO2 (if Cubic Zirconia)

Opalite

Man-made Synthetic Glass (Silicon Dioxide with metal additives)

Libyan Desert Glass

Libyan Desert Glass (SiO2 with trace elements)

Sea Glass

Amorphous silicon dioxide (SiO2) - Man-made glass tumbled by nature

Slag

Anthropogenic glassy silicate

Green sea glass (likely)

Man-made glass, likely soda-lime silicate glass; not a natural mineral or rock

Polished labradorite sphere

Labradorite, calcic plagioclase feldspar ((Ca,Na)(Al,Si)₄O₈)

Cherry Quartz with Rose Quartz

Crystalline Quartz (SiO2) with glass-based synthetic components

Goldstone beads (likely brown goldstone)

Man-made copper-bearing glass; not a natural mineral. Often sold as “aventurine glass.”

Tumbled milky quartz pebble

Quartz (silicon dioxide, SiO₂), likely milky quartz

Blue Sandstone

Man-made glass with cobalt and copper inclusions

Milky quartz (likely quartz crystal fragment)

Quartz, silicon dioxide (SiO₂)

Blue Goldstone

Synthetic glass with cobalt and copper inclusions

Likely iron-rich slag or weathered ironstone fragment

Uncertain; possibly iron oxide–rich material (hematite/goethite) or industrial iron slag