Man Made Glass (Not A Natural Rock Or Mineral)

Green Glass Cullet / Recycled Glass

Amorphous Silicon Dioxide (SiO2) with various metal oxides

Blue opalescent glass-like gemstone (possibly imitation opalite)

Likely man-made opalite glass; composition varies, typically silica-based glass

Blue opalite glass cabochon (likely imitation opal)

Man-made opalescent glass; not a natural mineral

Goldstone (aventurine glass)

Synthetic copper-bearing soda-lime glass; commonly sold as red goldstone

Blue goldstone (man-made glass)

Copper-bearing aventurine glass; synthetic silicate glass

Green glass-like cabochon, likely synthetic glass or resin

Unidentified green transparent material; possibly molded glass, synthetic spinel, or resin

Goldstone and pink quartz bead strands

Goldstone is aventurescent copper-bearing glass; pink beads are likely rose quartz (SiO₂), though dyed or glass imitations are possible

Opalite

Synthetic glass / Opaque silicious glass

Opalite

Synthesized glass / Silicon dioxide glass

Likely green bottle glass, not a geological specimen

Manufactured soda-lime 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

Green glass sphere/marble

Soda-lime glass (primarily SiO2, Na2O, CaO)

Opalite

Synthetic glass / Opalized glass

Blue glassy fragment among beach gravel

Likely cobalt-blue man-made glass; not a natural mineral specimen

Tumbled opalite (likely man-made glass)

Opalite, a trade name for opalescent glass; not natural opal

Opalite (a synthetic glass)

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

Green stone fragment (unidentified)

Undetermined; possibly serpentine or greenstone, but the image is insufficient for identification

Green sea glass (likely bottle glass)

Man-made soda-lime silicate glass; not a natural mineral

Opalite

Synthetic glass / Simulated opal

Opalite-style glass pendant

Man-made opalescent glass (not natural opal)

Opalite

Man-made Glass (Synthetic Opalized Glass)

Opalite (likely man-made glass)

Opalite; amorphous silica glass, not a natural mineral

Unidentified gray rock fragment

Indeterminate from image; possibly quartz- or feldspar-rich silicate material

Opalite (Man-made Glass)

Synthetic Opalised Glass

Blue Goldstone

Man-made glass with cobalt and metal flecks

Opalite (likely man-made glass)

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

Blue Obsidian (Cullet Glass)

Man-made silicate glass

Man-made Synthetic Material (Plastic/Composite)

Acrylonitrile Butadiene Styrene (ABS) or High-Impact Polystyrene (HIPS)

Small black stone fragment (possibly obsidian)

Unidentified dark rock; obsidian is volcanic glass (composition typically rhyolitic)

Green sea glass (likely slag glass or bottle glass)

Man-made soda-lime silicate glass; not a naturally occurring mineral

Opalite

Synthetic Opalite Glass / Opalized Glass

Small rock fragment (unidentified)

Undetermined; the image does not show enough detail for reliable identification

Carved opalite pendant

Opalite (man-made opalescent glass; not a natural mineral)

Opalite

Synthetic glass / Opalized glass

Opalite

Man-made opalized glass

Opalite

Synthesized glass / Silicon dioxide

Not a rock, mineral, or geological specimen

N/A - Non-Geological Item

Man-made Metal Pin (Non-geological)

Antimony-Lead Alloy or Zinc/Brass Base with Electroplating

Opalite (Man-made Glass)

Fused glass (typically made of dolomite and metal opacifiers)

Opalite

Synthetic Opalite (Man-made glass)

Blue crystal pendant (likely blue glass or synthetic crystal)

Not identifiable from the image; possibly synthetic quartz or glass, rather than a natural mineral