Anthropogenic Specimen (Man Made Material)

Opalite

Synthetic glass (SiO2 + impurities)

Slag Glass (Cullet)

Amorphous Silicon Dioxide (SiO2) with metal oxide colorants

Tumbled milky quartz pebble

Quartz (silicon dioxide, SiO₂), opaque-to-translucent milky variety

Glass / Silicon Dioxide (Man-made)

SiO2 (Amorphous Silicon Dioxide)

Green sea glass (likely)

Anthropogenic glass, not a mineral; composition commonly soda–lime silicate glass

Diamond

Native Carbon (C)

Quartz (Engineered Stone Countertop)

Silicon Dioxide (SiO2) with polymer resins

Red Sandstone or Brick Fragment

Arenite (if sandstone)

Hematite

Iron(III) oxide (Fe2O3)

Libyan Desert Glass

Tektite (high-silica impact glass), SiO2

Zinc Alloy (Silver-plated)

Zinc Alloy Casting (Zn-Al-Mg-Cu)

Tumbled milky quartz

Quartz — silicon dioxide (SiO₂), cryptocrystalline or microcrystalline variety possible

Carborundum (Silicon Carbide)

Silicon Carbide (SiC)

Goldstone

Avventurina (Man-made Glass with Copper inclusions)

Opalite (a synthetic glass)

Silicon Dioxide (SiO2) with various additives; not a true mineral but a man-made gem simulant

Opalite

Synthetic glass / Opaque silicious glass

Blue sea glass or blue glassy mineral fragment

Uncertain; likely man-made soda-lime glass, not a natural mineral

Polished opalite (likely man-made opalescent glass)

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

Opalite

Man-made opalescent glass

Opalite

Man-made opalized glass

Sea Glass

Man-made silicate glass

Slag Glass

Amorphous Silicate (Man-made)

Pyrite in Quartz (Drill Core)

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

Red glassy gemstone, possibly garnet

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

Slag (Anthropogenic Glass/Iron byproduct)

Ferro-silicate Slag

Asphalt (Bituminous Pavement)

Bituminous mix (Aggregates with Bitumen binder)

Possible weathered basalt or slag fragment

Basalt, chiefly plagioclase and pyroxene; identification is uncertain from the image

White quartz pebble or chip

Quartz (silicon dioxide, SiO₂), possibly milky quartz

Clear quartz crystal

Quartz (silicon dioxide, SiO₂)

Unidentified translucent crystal/mineral fragment

Likely quartz (SiO₂), but visual identification is uncertain

Synthetic Costume Accessory (Non-Geological)

Polyester and Acrylic Fiber (Anthropogenic polymer)

Note: This is a Man-Made Object (Costume/Prop Patch)

Synthetic fiber and pigments (Cellulose/Plastic-based composite)

Aura Quartz (Rainbow Quartz)

Silicon Dioxide (SiO2) with metallic vapor coatings

Dyed or synthetic turquoise-blue glass-like specimen

Likely man-made colored glass or resin; exact identification requires testing

Opalite (likely man-made glass)

Opalite; amorphous silica glass, not a natural mineral

Blue glassy gemstone cabochon, likely dyed chalcedony or glass

Uncertain; possible dyed chalcedony (microcrystalline quartz, SiO₂)

Opalite

Man-made Opalized Glass (Synthetic Glass)

Moldavite

Tektite (Impact Glass), ~80% SiO2 + Al2O3

Asphalt Chunk (Bituminous Concrete)

Aggregated Bitumen / Artificial Breccia

Carborundum (Silicon Carbide)

Silicon carbide (SiC)

Opalite

Synthetic Glass (Hydrated Silica Simulant)

Bismuth Crystal

Bismuth (Bi)