Anthropogenic (Man Made Product Subject To Geological Processes)

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

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

Opalite glass sphere (likely synthetic imitation)

Man-made opalescent glass; not natural opal

Concretion

Sedimentary Concretion (Ironstone / Calcite Concretion)

Quartz crystal (likely clear quartz)

Quartz, silicon dioxide (SiO₂)

Quartz (likely milky quartz or quartz glass-like fragment)

Quartz, silicon dioxide (SiO₂)

Blue Goldstone

Man-made glass with suspended copper, cobalt, or manganese particles

Quartz crystal fragment (likely milky quartz)

Quartz, silicon dioxide (SiO₂)

Orange glassy slag (industrial by-product)

Iron-rich silicate glass; composition varies, commonly Fe–Ca–Al silicate

Aura Quartz (Pink/Rose Aura Quartz)

Silicon Dioxide (SiO2) bonded with Platinum and/or Silver

Dyed Imperial Jasper (Sea Sediment Jasper)

Silicon Dioxide (SiO2) - Impure Quartz/Chalcedony

Red cabochon gemstone ring (likely ruby or red spinel; identity unconfirmed)

Possibly corundum (ruby, Al₂O₃) or spinel (MgAl₂O₄); visual identification alone cannot distinguish these from glass or synthetic stones.

Milky quartz (likely rough quartz crystal)

Quartz, silicon dioxide (SiO₂)

Green obsidian (likely molded or heat-treated glass-like specimen)

Volcanic glass; predominantly rhyolitic composition (silica-rich amorphous SiO₂)

Synthetic Resin (Artificial Specimen)

Polyurethane or Polyester Resin

Opalite

Synthetic Opalized Glass

Magnetic Hematite (Man-made)

Iron Oxide (Fe2O3) with Barium-Strontium Ferrite

Milky Quartz

Silicon Dioxide (SiO2)

White Marble

Recrystallized Calcite (CaCO3)

Goldstone

Avventurina (Man-made Glass with Copper inclusions)

Polished opalite (likely man-made opalescent glass)

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

Blue Cracked Quartz (Dyed Fire Crackle Quartz)

Silicon Dioxide (SiO2) with synthetic dye

Slag (Industrial By-product)

Glassy silicate or metallic smelting residue

Milky quartz (likely)

Quartz, silicon dioxide (SiO₂)

Tumbled milky quartz (likely)

Quartz, silicon dioxide (SiO₂)

Polished black pebble, possibly obsidian

Volcanic glass (obsidian), likely; identification is tentative from the image

Blue opal heart cabochon

Common opal, hydrated amorphous silica (SiO₂·nH₂O), likely blue-dyed or synthetic opalite

Tumbled clear quartz (rock crystal)

Quartz, silicon dioxide (SiO₂)

Iron Slag

Anthropogenic Vitreous Silicate (Byproduct of Smelting)

Clear quartz crystal

Quartz (silicon dioxide, SiO₂)

Asphalt (Bituminous Concrete)

Bituminous mix / Anthropogenic conglomerate

Pink Quartz / Sea Glass

Silicon Dioxide (SiO2)

Milky quartz (rough quartz fragment)

Quartz, silicon dioxide (SiO₂)

Goldstone (Red)

Aventurine Glass (Cupriferous glass)

Dyed Agate / Painted Stone

Silicon Dioxide (SiO2) with artificial pigment

Libyan Desert Glass

Libyan Desert Glass (SiO2 with trace elements)

Dyed Crackle Quartz (Green)

Quenching-treated Quartz (Silicon Dioxide, SiO2)

Asphalt Concrete

Bituminous Concrete / Asphaltic Composite

Obsidian (Blue)

Volcanic Glass (SiO2)

Carborundum

Silicon Carbide (SiC)

Carborundum (Silicon Carbide)

Silicon Carbide (SiC) / Moissanite (natural form)

Red glassy cabochon, likely synthetic ruby or red glass

Uncertain; possible synthetic corundum (Al₂O₃, chromium-colored) or man-made glass

Likely tumbled or cut quartz/chalcedony fragment

Silicon dioxide (SiO₂), probably microcrystalline quartz or quartz