Synthetic (Man Made Glass)

Opalite (likely man-made glass)

Opalite; amorphous silica glass, not a natural mineral

Opalite

Man-made opalescent glass (SiO2 + metal oxides)

Cubic Zirconia (Jewelry Setting)

Zirconium Dioxide (ZrO2)

Blue cabochon gemstone, likely synthetic glass or dyed stone

Indeterminate from image; possible glass, synthetic spinel, sodalite, or lapis lazuli

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.

Opalite

Synthetic Opalite Glass (Silicon Dioxide)

Opalite

Synthetically produced glass (Silicon Dioxide with metallic inclusions)

Blue Goldstone

Synthetic Avanturine Glass (or Aventurine Glass)

Opalite

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

Synthetic Resin / Plastic Figurine

Synthetic Polymer (Copolymer of Polyethylene or Resin)

Opalite

Synthetic Glass (Hydrated Crystalline Silicon Dioxide simulation)

Cherry Quartz with Rose Quartz

Crystalline Quartz (SiO2) with glass-based synthetic components

ABS Plastic (Acrylonitrile Butadiene Styrene)

(C8H8)x·(C4H6)y·(C3H3N)z

Opalite (likely man-made opalescent glass)

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

Red glassy cabochon, likely synthetic ruby or red glass

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

Ring with an Orange Inlay

N/A (Man-made object)

Crackled Quartz (Dyed)

Silicon Dioxide (SiO2)

Man-made Jewelry (Metal and Glass/Plastic)

Synthetic Alloy and Amorphous Solid (SiO2/Polymer)

Blue Goldstone

Aventurine Glass

Blue Sapphire (Synthetic or Man-made Glass Imitation)

Corundum (Al2O3) if natural; Lead-glass or Spinal if synthetic

Opalite-style pendant (likely synthetic glass, not natural opal)

Opalescent glass; commonly sold as “opalite” (not a recognized mineral species)

Opalite

Synthetic Glass, SiO2 base with metallic inclusions

Polished gemstone tower assortment

Primarily quartz varieties and simulants; apparent amethyst (SiO₂), rose quartz (SiO₂), clear quartz (SiO₂), fluorite (CaF₂), sodalite, malachite, and possibly dyed or composite stones

Cubic Zirconia

Cubic Zirconium Dioxide (ZrO2)

Faceted clear gemstone, likely quartz or glass imitation

Most likely quartz (SiO₂); exact identification requires refractive-index and hardness tests

Man-made Synthetic Material (Plastic/Composite)

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

Man-made Synthetic Material (Costume Faux Fur)

Synthetic Polymer (Polyester/Acrylic)

N/A - Non-Geological Item

Cubic Zirconia (Jewelry Setting)

Cubic Zirconia (ZrO2)

Dyed Agate

Chalcedony (SiO2)

Cobalt Glass Slug (Man-made Glass)

Amorphous Silica with Cobalt Oxide (SiO2 + CoO)

Man-made Glass (Tumbled/Shaped)

Amorphous Silicon Dioxide (SiO2) with metal oxide colorants

Man-made Polished Porcelain Tile (Artificial Geologic Lookalike)

Fused Silicate Ceramic with Alumina (Synthetic Kaolinite derivative)

Goldstone (with Tiger's Eye and Quartz)

Aventurine glass (Synthetic SiO2 with Cu inclusions)

Opalite (likely man-made glass)

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

Dyed or synthetic turquoise-blue glass-like specimen

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

Carborundum (Silicon Carbide)

Silicon carbide (SiC)

Cullet Glass / Slag Glass

Amorphous silica glass

Hematite

Iron(III) oxide (Fe2O3)

Acrylic or Resin (Synthetic Imitation)

Polymethyl Methacrylate (PMMA) or Polyepoxide

Green Glass (often marketed as 'Obsidian' or 'Green Quartz')

Amorphous Silica (SiO2) with copper or chromium additives

Sea Glass

Amorphous Silicon Dioxide (SiO2)