Sea Glass
Amorphous Silicon Dioxide (SiO2)
Mineral/Man-made
Category
Amorphous Solid
Browse amorphous solid specimens identified by the Rock Identifier community.
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Obsidian
Volcanic Glass (Amorphous Silica)
igneous
Pumice
Pumice (Amorphous volcanic glass)
igneous
Obsidian
Volcanic Glass (Amorphous SiO2)
igneous
Obsidian
Volcanic Glass (Amorphous SiO2)
igneous
Red Obsidian
Volcanic Glass (Amorphous SiO2)
igneous
Obsidian
Volcanic Glass (Amorphous SiO2)
igneous
Sea Glass
Amorphous Silica (Glass) SiO2
Mineraloid (Man-made origin)
Pumice
Pumice (Amorphous volcanic glass)
igneous
Pumice
Pumice (Amorphous volcanic glass)
igneous
Pumice
Pumice (Amorphous volcanic glass)
igneous
Amber
Succinite (amorphous organic polymer)
mineral
Pumice
Pumicite (Amorphous volcanic glass)
Igneous
Pumice
Pumice (Amorphous volcanic glass)
igneous
Tektite (Indochinite)
Tektite (Amorphous Silica Glass)
igneous
Obsidian
Volcanic Glass (Amorphous Silica)
igneous
Obsidian
Obsidian (Amorphous volcanic glass)
igneous
Slag Glass
Anthropogenic Amorphous Silicon Dioxide
mineral
Obsidian
Obsidian (Amorphous volcanic glass)
igneous
Cullet (Slag Glass)
Amorphous Silica (Industrial byproduct)
mineraloid
Amber
Amber (Amorphous Organic Hydrocarbon)
mineral
Obsidian (Apache Tear)
Amorphous Volcanic Glass (SiO2)
igneous
Slag Glass (Cullet)
Amorphous Silica / Glass residue
Man-made byproduct (Non-geological)
Black Obsidian
Obsidian (Amorphous Silicon Dioxide)
igneous
Glass
Amorphous Silicon Dioxide (SiO2)
mineraloid
Apache Tear (Obsidian)
Volcanic glass / Amorphous SiO2
igneous
Obsidian
Volcanic Glass (Amorphous SiO2)
igneous
Pumice
Pumicite (Amorphous Volcanic Glass)
Igneous
Blue Slag Glass
Anthropogenic Amorphous Silicon Dioxide
mineral
Pumice
Pumice (Amorphous volcanic glass)
igneous
Pumice
Pumice (Amorphous volcanic glass)
igneous
Blue Glass or Slag Glass
Amorphous Silica (Anthropogenic Glass)
mineral
Obsidian
Amorphous volcanic glass (70-75% SiO2)
igneous
Limonite (Yellow Ochre)
Hydrated Iron Oxide (FeO(OH)·nH2O)
mineral
Limonite (Iron Ore)
Limonite (Hydrous iron(III) oxide-hydroxide mixture, FeO(OH)·nH2O)
mineral
Red Jasper (possibly)
Jasper (a variety of Chalcedony, SiO2)
Mineral
Fire Opal (Common/Precious in Matrix)
Hydrated Silica (SiO2·nH2O)
mineral
Red Jasper
Jasper (a cryptocrystalline variety of Quartz, SiO₂)
Sedimentary Rock
Amber
Succinates
mineraloid
Gold Sheen Obsidian
Volcanic Glass (SiO2 + impurities)
igneous
Amber (Simulated/Faturan Style)
Resin mix (Likely Phenolic/Celluloid if synthetic, Succinite if natural)
Organic Gemstone (not a mineral)
Chipped Glass/Plastic Fragment
Silicon dioxide (SiO2) for glass (amorphous) or various polymer compounds for plastic
Man-made material (simulant/artifact)