Man Made Silicate (Anthropogenic Glass)

Amazonite

K(AlSi3O8) - Potassium Aluminum Silicate (color due to lead)

Blue Slag Glass

Amorphous Silica (Byproduct of smelting)

Man-made Metal Pin (Non-geological)

Antimony-Lead Alloy or Zinc/Brass Base with Electroplating

Sea Glass (Teal/Turquoise)

Amorphous Silica (SiO2) with trace metal oxides

Glass Nugget (Tumbled Glass)

Amorphous Silicon Dioxide (SiO2) with additives

Slag Glass

Glassy Silicate Residue

Goldstone (aventurine glass)

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

White Marble

Metamorphic Limestone (CaCO3)

Asphalt aggregate

Human-made bituminous asphalt containing crushed silicate rock aggregate

Blue glass-like bead or gemstone keychain ornament

Indeterminate; likely cobalt-blue glass or synthetic blue spinel, not identifiable as a natural mineral from the image

Chert (Green Chert or Jasper)

Microcrystalline Quartz (SiO2)

Sea Glass

Amorphous Silicon Dioxide (SiO2)

Likely blue glass or synthetic gemstone jewelry

Uncertain; possibly synthetic spinel, cubic zirconia, or blue glass

Porcelain (Stoneware Ceramic)

Mullite / Silica-glass composite (Al6Si2O13)

Quartz pebble

Silicon dioxide (SiO2)

Green Aura Quartz (Titanium treated Kyanite or Quartz)

Silicon Dioxide (SiO2) or Aluminum Silicate (Al2SiO5) with Titanium/Metal Oxide coating

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

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

Green Glass Slag

Amorphous Silicon Dioxide (SiO2) with metal oxide impurities

Pumice

Pumice (Volcanic silicate glass)

Clear-stone silver-tone teardrop earring

The stones may be colorless quartz or glass; the image does not allow reliable identification. Metal setting appears silver-tone.

Man-made Green Quartz (Lab-grown or Treated)

Silicon Dioxide (SiO2) with artificial coloration

Green Aventurine

Quartz (SiO2) with Fuchsite inclusions

White-and-dark marble or agate-style gemstone bead bracelet

Likely calcite-rich marble (CaCO₃) mixed with dark gray stone beads; exact material is uncertain from the photo

Black Obsidian

Obsidian (Volcanic Glass, SiO2 + impurities)

Rough Diamond

Native Carbon (C)

Red cabochon gemstone ring (likely glass or synthetic stone)

Undetermined; the image does not establish a natural mineral identity

Moldavite

Tektite (Natural Silicate Glass)

Slag (Industrial Glass/Metal Waste)

Artificial silicate/ferro-silicate byproduct

Sea Glass

Amorphous silicon dioxide (glass)

Tumbled quartz (likely milky quartz)

Quartz, silicon dioxide (SiO₂)

Colorless faceted gemstone, likely glass or quartz

Uncertain; possibly quartz (SiO₂), but the strong uniform brilliance and apparent molded/faceted form may indicate leaded glass or cubic zirconia

Ferrous Slag (Iron Smelting By-product)

Fused Siliceous Slag

Red faceted gemstone, possibly garnet

Likely almandine garnet, Fe₃Al₂(SiO₄)₃; identity cannot be confirmed from the image

Milky quartz

Quartz (silicon dioxide, SiO₂)

Likely clear quartz crystal (possibly cut/polished quartz or glass imitation)

Quartz, silicon dioxide (SiO₂)

Corundum (Pink Sapphire / Ruby)

Al2O3 (Aluminum Oxide)

Tektite

Natural impact glass

Slag

Ferrous slag (by-product of iron smelting)

Sea Glass

Amorphous Silica (Glass) SiO2

Obsidian

Volcanic Glass (70% or more SiO2)

Green Aventurine

Silicon Dioxide (SiO2) with inclusions of Fuchsite

Aventurine

Silicon Dioxide (SiO2) with inclusions of Fuchsite